From 26352dcaf1024edef85a4b26bb8289e864574926 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Wed, 25 Jun 2025 12:32:50 +0200
Subject: [PATCH 01/24] Migrate `ConversationListPage` to ListView

---
 ...ignConversationLabelDialogAction.class.php | 124 +++++++
 .../label/ConversationLabel.class.php         |  11 +
 ...rsationBulkInteractionCollecting.class.php |  21 ++
 ...onversationInteractionCollecting.class.php |  21 ++
 .../ConversationListViewInitialized.class.php |  21 ++
 files/lib/page/ConversationListPage.class.php | 316 ++---------------
 .../command/AssignConversationLabel.class.php |  80 +++++
 .../AssignConversationLabels.class.php        |   2 +
 .../GetConversationLabels.class.php           |   2 +
 .../GetConversationLeaveDialog.class.php      |   2 +
 .../conversations/LeaveConversation.class.php |   2 +
 .../ConversationLabelFormField.class.php      |  75 ++++
 .../ConversationBulkInteractions.class.php    |  46 +++
 .../user/ConversationInteractions.class.php   |  54 +++
 .../user/ConversationListView.class.php       | 127 +++++++
 files/style/conversation.scss                 |   5 +
 templates/conversationList.tpl                | 328 +-----------------
 templates/conversationListItems.tpl           | 121 +++++++
 .../shared_conversationLabelFormField.tpl     |  38 ++
 19 files changed, 794 insertions(+), 602 deletions(-)
 create mode 100644 files/lib/action/AssignConversationLabelDialogAction.class.php
 create mode 100644 files/lib/event/interaction/bulk/user/ConversationBulkInteractionCollecting.class.php
 create mode 100644 files/lib/event/interaction/user/ConversationInteractionCollecting.class.php
 create mode 100644 files/lib/event/listView/user/ConversationListViewInitialized.class.php
 create mode 100644 files/lib/system/conversation/command/AssignConversationLabel.class.php
 create mode 100644 files/lib/system/form/builder/field/ConversationLabelFormField.class.php
 create mode 100644 files/lib/system/interaction/bulk/user/ConversationBulkInteractions.class.php
 create mode 100644 files/lib/system/interaction/user/ConversationInteractions.class.php
 create mode 100644 files/lib/system/listView/user/ConversationListView.class.php
 create mode 100644 templates/conversationListItems.tpl
 create mode 100644 templates/shared_conversationLabelFormField.tpl

diff --git a/files/lib/action/AssignConversationLabelDialogAction.class.php b/files/lib/action/AssignConversationLabelDialogAction.class.php
new file mode 100644
index 00000000..8adc8e2f
--- /dev/null
+++ b/files/lib/action/AssignConversationLabelDialogAction.class.php
@@ -0,0 +1,124 @@
+<?php
+
+namespace wcf\action;
+
+use Laminas\Diactoros\Response\JsonResponse;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use wcf\data\conversation\Conversation;
+use wcf\data\conversation\label\ConversationLabel;
+use wcf\data\conversation\label\ConversationLabelList;
+use wcf\http\Helper;
+use wcf\system\conversation\command\AssignConversationLabel;
+use wcf\system\exception\IllegalLinkException;
+use wcf\system\exception\PermissionDeniedException;
+use wcf\system\form\builder\field\MultipleSelectionFormField;
+use wcf\system\form\builder\Psr15DialogForm;
+use wcf\system\WCF;
+
+/**
+ * Action for assigning label to a conversation.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class AssignConversationLabelDialogAction implements RequestHandlerInterface
+{
+    #[\Override]
+    public function handle(ServerRequestInterface $request): ResponseInterface
+    {
+        $parameters = Helper::mapQueryParameters(
+            $request->getQueryParams(),
+            <<<'EOT'
+                array {
+                    id?: positive-int,
+                    objectIDs?: positive-int[]
+                }
+                EOT
+        );
+
+        if (!isset($parameters['id']) && !isset($parameters['objectIDs'])) {
+            throw new IllegalLinkException();
+        }
+
+        $conversationIDs = $parameters['objectIDs'] ?? [$parameters['id']];
+
+        if ($conversationIDs === []) {
+            throw new IllegalLinkException();
+        }
+
+        if (!Conversation::isParticipant($conversationIDs)) {
+            throw new PermissionDeniedException();
+        }
+
+        $labelList = ConversationLabel::getLabelsByUser();
+        if ($labelList->count() === 0) {
+            throw new IllegalLinkException();
+        }
+
+        $form = $this->getForm($conversationIDs, $labelList);
+
+        if ($request->getMethod() === 'GET') {
+            return $form->toResponse();
+        } elseif ($request->getMethod() === 'POST') {
+            $response = $form->validateRequest($request);
+            if ($response !== null) {
+                return $response;
+            }
+            $labelIDs = $form->getData()['labelIDs'] ?? [];
+
+            (new AssignConversationLabel($labelList, $conversationIDs, $labelIDs))();
+
+            return new JsonResponse([]);
+        } else {
+            throw new \LogicException('Unreachable');
+        }
+    }
+
+    /**
+     * @param int[] $conversationIDs
+     */
+    private function getForm(array $conversationIDs, ConversationLabelList $labelList): Psr15DialogForm
+    {
+        $form = new Psr15DialogForm(
+            static::class,
+            WCF::getLanguage()->get('wcf.conversation.label.assignLabels')
+        );
+
+        $form->appendChildren([
+            MultipleSelectionFormField::create('labelIDs')
+                ->options(
+                    \array_map(static fn (ConversationLabel $label) => $label->render(), $labelList->getObjects())
+                )
+                ->value($this->getSelectedLabelIDs($conversationIDs)),
+        ]);
+
+        $form->markRequiredFields(false);
+        $form->build();
+
+        return $form;
+    }
+
+    /**
+     * @param int[] $conversationIDs
+     *
+     * @return int[]
+     */
+    private function getSelectedLabelIDs(array $conversationIDs): array
+    {
+        if (\count($conversationIDs) !== 1) {
+            return [];
+        }
+
+        $sql = "SELECT  labelID
+                FROM    wcf1_conversation_label_to_object
+                WHERE   conversationID = ?";
+        $statement = WCF::getDB()->prepare($sql);
+        $statement->execute([\reset($conversationIDs)]);
+
+        return $statement->fetchAll(\PDO::FETCH_COLUMN) ?: [];
+    }
+}
diff --git a/files/lib/data/conversation/label/ConversationLabel.class.php b/files/lib/data/conversation/label/ConversationLabel.class.php
index f81ee91c..3330d4e3 100644
--- a/files/lib/data/conversation/label/ConversationLabel.class.php
+++ b/files/lib/data/conversation/label/ConversationLabel.class.php
@@ -4,6 +4,7 @@
 
 use wcf\data\DatabaseObject;
 use wcf\system\WCF;
+use wcf\util\StringUtil;
 
 /**
  * Represents a conversation label.
@@ -64,4 +65,14 @@ public static function getLabelCssClassNames()
     {
         return self::$availableCssClassNames;
     }
+
+    public function render(): string
+    {
+        $cssClassName = $this->cssClassName ? ' ' . $this->cssClassName : '';
+        $title = StringUtil::encodeHTML($this->label);
+
+        return <<<HTML
+            <span class="badge label{$cssClassName}">{$title}</span>
+        HTML;
+    }
 }
diff --git a/files/lib/event/interaction/bulk/user/ConversationBulkInteractionCollecting.class.php b/files/lib/event/interaction/bulk/user/ConversationBulkInteractionCollecting.class.php
new file mode 100644
index 00000000..a22a1c39
--- /dev/null
+++ b/files/lib/event/interaction/bulk/user/ConversationBulkInteractionCollecting.class.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace wcf\event\interaction\bulk\user;
+
+use wcf\event\IPsr14Event;
+use wcf\system\interaction\bulk\user\ConversationBulkInteractions;
+
+/**
+ * Indicates that the provider for conversation bulk interactions is collecting interactions.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class ConversationBulkInteractionCollecting implements IPsr14Event
+{
+    public function __construct(public readonly ConversationBulkInteractions $param)
+    {
+    }
+}
diff --git a/files/lib/event/interaction/user/ConversationInteractionCollecting.class.php b/files/lib/event/interaction/user/ConversationInteractionCollecting.class.php
new file mode 100644
index 00000000..9cebaf27
--- /dev/null
+++ b/files/lib/event/interaction/user/ConversationInteractionCollecting.class.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace wcf\event\interaction\user;
+
+use wcf\event\IPsr14Event;
+use wcf\system\interaction\user\ConversationInteractions;
+
+/**
+ * Indicates that the provider for conversation interactions is collecting interactions.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class ConversationInteractionCollecting implements IPsr14Event
+{
+    public function __construct(public readonly ConversationInteractions $param)
+    {
+    }
+}
diff --git a/files/lib/event/listView/user/ConversationListViewInitialized.class.php b/files/lib/event/listView/user/ConversationListViewInitialized.class.php
new file mode 100644
index 00000000..8a279ee2
--- /dev/null
+++ b/files/lib/event/listView/user/ConversationListViewInitialized.class.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace wcf\event\listView\user;
+
+use wcf\event\IPsr14Event;
+use wcf\system\listView\user\ConversationListView;
+
+/**
+ * Indicates that the conversation list view has been initialized.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class ConversationListViewInitialized implements IPsr14Event
+{
+    public function __construct(public readonly ConversationListView $param)
+    {
+    }
+}
diff --git a/files/lib/page/ConversationListPage.class.php b/files/lib/page/ConversationListPage.class.php
index 69c0ac1f..6ce0b39a 100644
--- a/files/lib/page/ConversationListPage.class.php
+++ b/files/lib/page/ConversationListPage.class.php
@@ -2,115 +2,33 @@
 
 namespace wcf\page;
 
-use wcf\data\conversation\label\ConversationLabel;
-use wcf\data\conversation\label\ConversationLabelList;
 use wcf\data\conversation\UserConversationList;
-use wcf\system\clipboard\ClipboardHandler;
-use wcf\system\database\util\PreparedStatementConditionBuilder;
-use wcf\system\exception\IllegalLinkException;
-use wcf\system\page\PageLocationManager;
+use wcf\system\listView\user\ConversationListView;
 use wcf\system\request\LinkHandler;
 use wcf\system\WCF;
-use wcf\util\ArrayUtil;
-use wcf\util\HeaderUtil;
 
 /**
  * Shows a list of conversations.
  *
- * @author  Marcel Werk
- * @copyright   2001-2019 WoltLab GmbH
+ * @author  Olaf Braun, Marcel Werk
+ * @copyright   2001-2025 WoltLab GmbH
  * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  *
- * @extends SortablePage<UserConversationList>
+ * @extends AbstractListViewPage<ConversationListView>
  */
-class ConversationListPage extends SortablePage
+final class ConversationListPage extends AbstractListViewPage
 {
-    /**
-     * @inheritDoc
-     */
-    public $defaultSortField = CONVERSATION_LIST_DEFAULT_SORT_FIELD;
-
-    /**
-     * @inheritDoc
-     */
-    public $defaultSortOrder = CONVERSATION_LIST_DEFAULT_SORT_ORDER;
-
-    /**
-     * @inheritDoc
-     */
-    public $validSortFields = ['subject', 'time', 'username', 'lastPostTime', 'replies', 'participants'];
-
-    /**
-     * @inheritDoc
-     */
-    public $itemsPerPage = CONVERSATIONS_PER_PAGE;
-
-    /**
-     * @inheritDoc
-     */
-    public $loginRequired = true;
-
-    /**
-     * @inheritDoc
-     */
-    public $neededModules = ['MODULE_CONVERSATION'];
-
-    /**
-     * @inheritDoc
-     */
-    public $neededPermissions = ['user.conversation.canUseConversation'];
+    public string $filter = '';
 
-    /**
-     * list filter
-     * @var string
-     */
-    public $filter = '';
+    public int $conversationCount = 0;
 
-    /**
-     * label id
-     * @var int
-     */
-    public $labelID = 0;
+    public int $draftCount = 0;
 
-    /**
-     * label list object
-     * @var ConversationLabelList
-     */
-    public $labelList;
-
-    /**
-     * number of conversations (no filter)
-     * @var int
-     */
-    public $conversationCount = 0;
+    public int $hiddenCount = 0;
 
-    /**
-     * number of drafts
-     * @var int
-     */
-    public $draftCount = 0;
+    public int $outboxCount = 0;
 
-    /**
-     * number of hidden conversations
-     * @var int
-     */
-    public $hiddenCount = 0;
-
-    /**
-     * number of sent conversations
-     * @var int
-     */
-    public $outboxCount = 0;
-
-    /**
-     * participant that
-     * @var string[]
-     */
-    public $participants = [];
-
-    /**
-     * @inheritDoc
-     */
+    #[\Override]
     public function readParameters()
     {
         parent::readParameters();
@@ -121,131 +39,6 @@ public function readParameters()
         if (!\in_array($this->filter, UserConversationList::$availableFilters)) {
             $this->filter = '';
         }
-
-        // user settings
-        /** @noinspection PhpUndefinedFieldInspection */
-        if (WCF::getUser()->conversationsPerPage) {
-            /** @noinspection PhpUndefinedFieldInspection */
-            $this->itemsPerPage = WCF::getUser()->conversationsPerPage;
-        }
-
-        // labels
-        $this->labelList = ConversationLabel::getLabelsByUser();
-        if (!empty($_REQUEST['labelID'])) {
-            $this->labelID = \intval($_REQUEST['labelID']);
-
-            $validLabel = false;
-            foreach ($this->labelList as $label) {
-                if ($label->labelID == $this->labelID) {
-                    $validLabel = true;
-                    break;
-                }
-            }
-
-            if (!$validLabel) {
-                throw new IllegalLinkException();
-            }
-        }
-
-        if (isset($_REQUEST['participants'])) {
-            $this->participants = \array_slice(ArrayUtil::trim(\explode(',', $_REQUEST['participants'])), 0, 20);
-        }
-
-        if (!empty($_POST)) {
-            $participantsParameter = '';
-            foreach ($this->participants as $participant) {
-                if (!empty($participantsParameter)) {
-                    $participantsParameter .= ',';
-                }
-                $participantsParameter .= \rawurlencode($participant);
-            }
-            if (!empty($participantsParameter)) {
-                $participantsParameter = '&participants=' . $participantsParameter;
-            }
-
-            HeaderUtil::redirect(
-                LinkHandler::getInstance()->getLink(
-                    'ConversationList',
-                    [],
-                    'sortField=' . $this->sortField . '&sortOrder=' . $this->sortOrder . '&filter=' . $this->filter . '&labelID=' . $this->labelID . '&pageNo=' . $this->pageNo . $participantsParameter
-                )
-            );
-
-            exit;
-        }
-    }
-
-    /**
-     * @inheritDoc
-     */
-    protected function initObjectList()
-    {
-        $this->objectList = new UserConversationList(WCF::getUser()->userID, $this->filter, $this->labelID);
-        $this->objectList->setLabelList($this->labelList);
-
-        if (!empty($this->participants)) {
-            // The column `conversation_to_user.username` has no index, causing full table scans when
-            // trying to filter by it, therefore we'll read the user ids in advance.
-            $conditions = new PreparedStatementConditionBuilder();
-            $conditions->add('username IN (?)', [$this->participants]);
-            $sql = "SELECT  userID
-                    FROM    wcf1_user
-                    " . $conditions;
-            $statement = WCF::getDB()->prepare($sql);
-            $statement->execute($conditions->getParameters());
-            $userIDs = [];
-            while ($userID = $statement->fetchColumn()) {
-                $userIDs[] = $userID;
-            }
-
-            if (!empty($userIDs)) {
-                // The condition is split into two branches in order to account for invisible participants.
-                // Invisible participants are only visible to the conversation starter and remain invisible
-                // until they write their first message.
-                //
-                // We need to protect these users from being exposed as participants by including them for
-                // any conversation that the current user has started. For all other conversations, users
-                // flagged with `isInvisible = 0` must be excluded.
-                //
-                // See https://github.com/WoltLab/com.woltlab.wcf.conversation/issues/131
-                $this->objectList->getConditionBuilder()->add('
-                    (
-                        (
-                            conversation.userID = ?
-                            AND conversation.conversationID IN (
-                                SELECT      conversationID
-                                FROM        wcf1_conversation_to_user
-                                WHERE       participantID IN (?)
-                                GROUP BY    conversationID
-                                HAVING      COUNT(conversationID) = ?
-                            )
-                        )
-                        OR
-                        (
-                            conversation.userID <> ?
-                            AND conversation.conversationID IN (
-                                SELECT      conversationID
-                                FROM        wcf1_conversation_to_user
-                                WHERE       participantID IN (?)
-                                        AND isInvisible = ?
-                                GROUP BY    conversationID
-                                HAVING      COUNT(conversationID) = ?
-                            )
-                        )
-                    )', [
-                    // Parameters for the first condition.
-                    WCF::getUser()->userID,
-                    $userIDs,
-                    \count($userIDs),
-
-                    // Parameters for the second condition.
-                    WCF::getUser()->userID,
-                    $userIDs,
-                    0,
-                    \count($userIDs),
-                ]);
-            }
-        }
     }
 
     /**
@@ -253,83 +46,46 @@ protected function initObjectList()
      */
     public function readData()
     {
-        // if sort field is `username`, `conversation.` has to prepended because `username`
-        // alone is ambiguous
-        if ($this->sortField === 'username') {
-            $this->sortField = 'conversation.username';
-        }
-
         parent::readData();
 
-        // change back to old value
-        if ($this->sortField === 'conversation.username') {
-            $this->sortField = 'username';
-        }
-
-        if ($this->filter != '') {
-            // `-1` = pseudo object id to have to pages with identifier `com.woltlab.wcf.conversation.ConversationList`
-            PageLocationManager::getInstance()->addParentLocation('com.woltlab.wcf.conversation.ConversationList', -1);
-        }
-
-        // read stats
-        if (!$this->labelID && empty($this->participants)) {
-            switch ($this->filter) {
-                case '':
-                    $this->conversationCount = $this->items;
-                    break;
-
-                case 'draft':
-                    $this->draftCount = $this->items;
-                    break;
-
-                case 'hidden':
-                    $this->hiddenCount = $this->items;
-                    break;
-
-                case 'outbox':
-                    $this->outboxCount = $this->items;
-                    break;
-            }
-        }
+        $this->conversationCount = $this->getConversationCount('');
+        $this->draftCount = $this->getConversationCount('draft');
+        $this->hiddenCount = $this->getConversationCount('hidden');
+        $this->outboxCount = $this->getConversationCount('outbox');
+    }
 
-        if ($this->filter != '' || $this->labelID || !empty($this->participants)) {
-            $conversationList = new UserConversationList(WCF::getUser()->userID, '');
-            $this->conversationCount = $conversationList->countObjects();
-        }
-        if ($this->filter != 'draft' || $this->labelID || !empty($this->participants)) {
-            $conversationList = new UserConversationList(WCF::getUser()->userID, 'draft');
-            $this->draftCount = $conversationList->countObjects();
-        }
-        if ($this->filter != 'hidden' || $this->labelID || !empty($this->participants)) {
-            $conversationList = new UserConversationList(WCF::getUser()->userID, 'hidden');
-            $this->hiddenCount = $conversationList->countObjects();
-        }
-        if ($this->filter != 'outbox' || $this->labelID || !empty($this->participants)) {
-            $conversationList = new UserConversationList(WCF::getUser()->userID, 'outbox');
-            $this->outboxCount = $conversationList->countObjects();
-        }
+    private function getConversationCount(string $filter): int
+    {
+        return (new UserConversationList(WCF::getUser()->userID, $filter))->countObjects();
     }
 
-    /**
-     * @inheritDoc
-     */
+    #[\Override]
     public function assignVariables()
     {
         parent::assignVariables();
 
         WCF::getTPL()->assign([
             'filter' => $this->filter,
-            'hasMarkedItems' => ClipboardHandler::getInstance()->hasMarkedItems(
-                ClipboardHandler::getInstance()->getObjectTypeID('com.woltlab.wcf.conversation.conversation')
-            ),
-            'labelID' => $this->labelID,
-            'labelList' => $this->labelList,
             'conversationCount' => $this->conversationCount,
             'draftCount' => $this->draftCount,
             'hiddenCount' => $this->hiddenCount,
             'outboxCount' => $this->outboxCount,
-            'participants' => $this->participants,
-            'validSortFields' => $this->validSortFields,
         ]);
     }
+
+    #[\Override]
+    protected function createListView(): ConversationListView
+    {
+        return new ConversationListView($this->filter);
+    }
+
+    #[\Override]
+    protected function initListView(): void
+    {
+        parent::initListView();
+
+        $this->listView->setBaseUrl(LinkHandler::getInstance()->getControllerLink(static::class, [
+            'filter' => $this->filter,
+        ]));
+    }
 }
diff --git a/files/lib/system/conversation/command/AssignConversationLabel.class.php b/files/lib/system/conversation/command/AssignConversationLabel.class.php
new file mode 100644
index 00000000..63a08291
--- /dev/null
+++ b/files/lib/system/conversation/command/AssignConversationLabel.class.php
@@ -0,0 +1,80 @@
+<?php
+
+namespace wcf\system\conversation\command;
+
+use wcf\data\conversation\label\ConversationLabelList;
+use wcf\system\database\util\PreparedStatementConditionBuilder;
+use wcf\system\WCF;
+
+/**
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class AssignConversationLabel
+{
+    public function __construct(
+        public readonly ConversationLabelList $labelList,
+        /**
+         * @var int[]
+         */
+        public readonly array $conversationIDs,
+        /**
+         * @var int[]
+         */
+        public readonly array $labelIDs
+    ) {
+    }
+
+    public function __invoke(): void
+    {
+        $this->removeOldLabels($this->conversationIDs, $this->labelList->getObjectIDs());
+        $this->assignLabels($this->conversationIDs, $this->labelIDs);
+    }
+
+    /**
+     * @param int[] $conversationIDs
+     * @param int[] $labelIDs
+     */
+    private function removeOldLabels(array $conversationIDs, array $labelIDs): void
+    {
+        if ($labelIDs === []) {
+            return;
+        }
+
+        $conditions = new PreparedStatementConditionBuilder();
+        $conditions->add("conversationID IN (?)", [$conversationIDs]);
+        $conditions->add("labelID IN (?)", [$labelIDs]);
+
+        $sql = "DELETE FROM wcf1_conversation_label_to_object
+                " . $conditions;
+        $statement = WCF::getDB()->prepare($sql);
+        $statement->execute($conditions->getParameters());
+    }
+
+    /**
+     * @param int[] $conversationIDs
+     * @param int[] $labelIDs
+     */
+    private function assignLabels(array $conversationIDs, array $labelIDs): void
+    {
+        if ($labelIDs === []) {
+            return;
+        }
+
+        $sql = "INSERT INTO wcf1_conversation_label_to_object
+                            (labelID, conversationID)
+                VALUES      (?, ?)";
+        $statement = WCF::getDB()->prepare($sql);
+
+        foreach ($labelIDs as $labelID) {
+            foreach ($conversationIDs as $conversationID) {
+                $statement->execute([
+                    $labelID,
+                    $conversationID,
+                ]);
+            }
+        }
+    }
+}
diff --git a/files/lib/system/endpoint/controller/core/conversations/AssignConversationLabels.class.php b/files/lib/system/endpoint/controller/core/conversations/AssignConversationLabels.class.php
index f983ad67..561b738c 100644
--- a/files/lib/system/endpoint/controller/core/conversations/AssignConversationLabels.class.php
+++ b/files/lib/system/endpoint/controller/core/conversations/AssignConversationLabels.class.php
@@ -24,6 +24,8 @@
  * @copyright   2001-2025 WoltLab GmbH
  * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  * @since       6.2
+ *
+ * TODO remove
  */
 #[PostRequest('/core/conversations/assign-labels')]
 final class AssignConversationLabels implements IController
diff --git a/files/lib/system/endpoint/controller/core/conversations/GetConversationLabels.class.php b/files/lib/system/endpoint/controller/core/conversations/GetConversationLabels.class.php
index 1fbd2e6a..c17c071a 100644
--- a/files/lib/system/endpoint/controller/core/conversations/GetConversationLabels.class.php
+++ b/files/lib/system/endpoint/controller/core/conversations/GetConversationLabels.class.php
@@ -26,6 +26,8 @@
  * @copyright   2001-2025 WoltLab GmbH
  * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  * @since       6.2
+ *
+ * TODO remove
  */
 #[GetRequest('/core/conversations/labels')]
 final class GetConversationLabels implements IController
diff --git a/files/lib/system/endpoint/controller/core/conversations/GetConversationLeaveDialog.class.php b/files/lib/system/endpoint/controller/core/conversations/GetConversationLeaveDialog.class.php
index 78e1deba..70bd1b37 100644
--- a/files/lib/system/endpoint/controller/core/conversations/GetConversationLeaveDialog.class.php
+++ b/files/lib/system/endpoint/controller/core/conversations/GetConversationLeaveDialog.class.php
@@ -19,6 +19,8 @@
  * @copyright   2001-2025 WoltLab GmbH
  * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  * @since       6.2
+ *
+ * TODO remove
  */
 #[GetRequest('/core/conversations/{id:\d+}/leave-dialog')]
 final class GetConversationLeaveDialog implements IController
diff --git a/files/lib/system/endpoint/controller/core/conversations/LeaveConversation.class.php b/files/lib/system/endpoint/controller/core/conversations/LeaveConversation.class.php
index df9d14a8..b7220e60 100644
--- a/files/lib/system/endpoint/controller/core/conversations/LeaveConversation.class.php
+++ b/files/lib/system/endpoint/controller/core/conversations/LeaveConversation.class.php
@@ -19,6 +19,8 @@
  * @copyright   2001-2025 WoltLab GmbH
  * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  * @since       6.2
+ *
+ * TODO remove
  */
 #[PostRequest('/core/conversations/{id:\d+}/leave')]
 final class LeaveConversation implements IController
diff --git a/files/lib/system/form/builder/field/ConversationLabelFormField.class.php b/files/lib/system/form/builder/field/ConversationLabelFormField.class.php
new file mode 100644
index 00000000..47c045be
--- /dev/null
+++ b/files/lib/system/form/builder/field/ConversationLabelFormField.class.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace wcf\system\form\builder\field;
+
+use wcf\data\conversation\label\ConversationLabel;
+use wcf\system\form\builder\field\validation\FormFieldValidationError;
+
+/**
+ * Implementation of a form field to select a conversation label.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class ConversationLabelFormField extends AbstractFormField
+{
+    /**
+     * @var ConversationLabel[]
+     */
+    public array $labels = [];
+
+    /**
+     * @inheritDoc
+     */
+    protected $javaScriptDataHandlerModule = 'WoltLabSuite/Core/Form/Builder/Field/Value';
+
+    /**
+     * @inheritDoc
+     */
+    protected $templateName = 'shared_conversationLabelFormField';
+
+    /**
+     * @param ConversationLabel[] $labels
+     */
+    public function labels(array $labels): static
+    {
+        $this->labels = $labels;
+
+        return $this;
+    }
+
+    /**
+     * @return ConversationLabel[]
+     */
+    public function getLabels(): array
+    {
+        return $this->labels;
+    }
+
+    #[\Override]
+    public function readValue()
+    {
+        if ($this->getDocument()->hasRequestData($this->getPrefixedId())) {
+            $this->value = \intval($this->getDocument()->getRequestData($this->getPrefixedId()));
+        }
+
+        return $this;
+    }
+
+    #[\Override]
+    public function validate()
+    {
+        if ($this->isRequired()) {
+            if ($this->value <= 0) {
+                $this->addValidationError(new FormFieldValidationError('empty'));
+            }
+        } elseif ($this->value > 0 && !\array_key_exists($this->value, $this->labels)) {
+            $this->addValidationError(new FormFieldValidationError(
+                'invalidValue',
+                'wcf.global.form.error.noValidSelection'
+            ));
+        }
+    }
+}
diff --git a/files/lib/system/interaction/bulk/user/ConversationBulkInteractions.class.php b/files/lib/system/interaction/bulk/user/ConversationBulkInteractions.class.php
new file mode 100644
index 00000000..4eb7c4ac
--- /dev/null
+++ b/files/lib/system/interaction/bulk/user/ConversationBulkInteractions.class.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace wcf\system\interaction\bulk\user;
+
+use wcf\action\AssignConversationLabelDialogAction;
+use wcf\data\conversation\ConversationList;
+use wcf\data\conversation\label\ConversationLabel;
+use wcf\event\interaction\bulk\user\ConversationBulkInteractionCollecting;
+use wcf\system\event\EventHandler;
+use wcf\system\interaction\bulk\AbstractBulkInteractionProvider;
+use wcf\system\interaction\bulk\BulkFormBuilderDialogInteraction;
+
+/**
+ * Bulk interaction provider for conversations.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class ConversationBulkInteractions extends AbstractBulkInteractionProvider
+{
+    public function __construct()
+    {
+        $labelList = ConversationLabel::getLabelsByUser();
+
+        $this->addInteractions([
+            new BulkFormBuilderDialogInteraction(
+                'assignLabel',
+                AssignConversationLabelDialogAction::class,
+                'wcf.conversation.edit.assignLabel',
+                static fn () => $labelList->count() > 0,
+            ),
+        ]);
+
+        EventHandler::getInstance()->fire(
+            new ConversationBulkInteractionCollecting($this)
+        );
+    }
+
+    #[\Override]
+    public function getObjectListClassName(): string
+    {
+        return ConversationList::class;
+    }
+}
diff --git a/files/lib/system/interaction/user/ConversationInteractions.class.php b/files/lib/system/interaction/user/ConversationInteractions.class.php
new file mode 100644
index 00000000..4de1f507
--- /dev/null
+++ b/files/lib/system/interaction/user/ConversationInteractions.class.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace wcf\system\interaction\user;
+
+use wcf\action\AssignConversationLabelDialogAction;
+use wcf\data\conversation\Conversation;
+use wcf\data\conversation\label\ConversationLabel;
+use wcf\event\interaction\user\ConversationInteractionCollecting;
+use wcf\system\event\EventHandler;
+use wcf\system\interaction\AbstractInteractionProvider;
+use wcf\system\interaction\Divider;
+use wcf\system\interaction\FormBuilderDialogInteraction;
+use wcf\system\request\LinkHandler;
+
+/**
+ * Interaction provider for conversations.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class ConversationInteractions extends AbstractInteractionProvider
+{
+    public function __construct()
+    {
+        $labelList = ConversationLabel::getLabelsByUser();
+
+        $this->addInteractions([
+            // TODO edit subject `wcf.conversation.edit.subject`
+            // TODO close `wcf.conversation.edit.close`
+            // TODO open `wcf.conversation.edit.open`
+            new FormBuilderDialogInteraction(
+                'assignLabel',
+                LinkHandler::getInstance()->getControllerLink(AssignConversationLabelDialogAction::class, ['id' => '%s']),
+                'wcf.conversation.edit.assignLabel',
+                static fn () => $labelList->count() > 0,
+            ),
+            new Divider(),
+            // TODO add a participant `wcf.conversation.edit.addParticipants`
+            // TODO leave `wcf.conversation.edit.leave`
+        ]);
+
+        EventHandler::getInstance()->fire(
+            new ConversationInteractionCollecting($this)
+        );
+    }
+
+    #[\Override]
+    public function getObjectClassName(): string
+    {
+        return Conversation::class;
+    }
+}
diff --git a/files/lib/system/listView/user/ConversationListView.class.php b/files/lib/system/listView/user/ConversationListView.class.php
new file mode 100644
index 00000000..832866c6
--- /dev/null
+++ b/files/lib/system/listView/user/ConversationListView.class.php
@@ -0,0 +1,127 @@
+<?php
+
+namespace wcf\system\listView\user;
+
+use wcf\data\conversation\label\ConversationLabel;
+use wcf\data\conversation\label\ConversationLabelList;
+use wcf\data\conversation\UserConversationList;
+use wcf\data\conversation\ViewableConversation;
+use wcf\data\DatabaseObjectList;
+use wcf\event\listView\user\ConversationListViewInitialized;
+use wcf\system\form\builder\field\AbstractFormField;
+use wcf\system\form\builder\field\ConversationLabelFormField;
+use wcf\system\interaction\bulk\user\ConversationBulkInteractions;
+use wcf\system\interaction\user\ConversationInteractions;
+use wcf\system\listView\AbstractListView;
+use wcf\system\listView\filter\AbstractFilter;
+use wcf\system\listView\filter\TextFilter;
+use wcf\system\listView\filter\UserFilter;
+use wcf\system\listView\ListViewSortField;
+use wcf\system\WCF;
+
+/**
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ *
+ * @extends AbstractListView<ViewableConversation, UserConversationList>
+ */
+final class ConversationListView extends AbstractListView
+{
+    public readonly string $filter;
+
+    public function __construct(string $filter = '')
+    {
+        if ($filter === '' || \in_array($filter, UserConversationList::$availableFilters)) {
+            $this->filter = $filter;
+        } else {
+            $this->filter = '';
+        }
+
+        $this->addAvailableSortFields([
+            new ListViewSortField('time', 'wcf.global.date'),
+            new ListViewSortField('subject', 'wcf.global.title'),
+            new ListViewSortField('lastPostTime', 'wcf.conversation.lastPostTime'),
+            new ListViewSortField('username', 'wcf.user.username'),
+            new ListViewSortField('replies', 'wcf.conversation.replies'),
+            new ListViewSortField('participants', 'wcf.conversation.participants'),
+        ]);
+
+        $this->addAvailableFilters([
+            new TextFilter('subject', 'wcf.global.title'),
+            new UserFilter('participants', 'wcf.conversation.participants'),
+            $this->getLabelFilter(),
+        ]);
+
+        $this->setInteractionProvider(new ConversationInteractions());
+        $this->setBulkInteractionProvider(new ConversationBulkInteractions());
+
+        $this->setItemsPerPage(WCF::getUser()->conversationsPerPage ?: \CONVERSATIONS_PER_PAGE);
+        $this->setSortField(\CONVERSATION_LIST_DEFAULT_SORT_FIELD);
+        $this->setSortOrder(\CONVERSATION_LIST_DEFAULT_SORT_ORDER);
+        $this->setCssClassName("tabularList");
+    }
+
+    #[\Override]
+    protected function createObjectList(): UserConversationList
+    {
+        return new UserConversationList(WCF::getUser()->userID, $this->filter);
+    }
+
+    #[\Override]
+    public function renderItems(): string
+    {
+        return WCF::getTPL()->render('wcf', 'conversationListItems', ['view' => $this]);
+    }
+
+    #[\Override]
+    protected function getInitializedEvent(): ConversationListViewInitialized
+    {
+        return new ConversationListViewInitialized($this);
+    }
+
+    #[\Override]
+    public function getParameters(): array
+    {
+        return ['filter' => $this->filter];
+    }
+
+    private function getLabelFilter(): AbstractFilter
+    {
+        return new class extends AbstractFilter {
+            public readonly ConversationLabelList $labelList;
+
+            public function __construct()
+            {
+                $this->labelList = ConversationLabel::getLabelsByUser();
+                parent::__construct('label', 'wcf.label.label');
+            }
+
+            public function getFormField(): AbstractFormField
+            {
+                return ConversationLabelFormField::create('label')
+                    ->label($this->languageItem)
+                    ->labels($this->labelList->getObjects());
+            }
+
+            public function applyFilter(DatabaseObjectList $list, string $value): void
+            {
+                $list->getConditionBuilder()->add(
+                    "{$list->getDatabaseTableAlias()}.{$list->getDatabaseTableIndexName()} IN (
+                        SELECT  conversationID
+                        FROM    wcf1_conversation_label_to_object
+                        WHERE   labelID = ?
+                    )",
+                    [$value]
+                );
+            }
+
+            #[\Override]
+            public function renderValue(string $value): string
+            {
+                return $this->labelList->search((int)$value)->label;
+            }
+        };
+    }
+}
diff --git a/files/style/conversation.scss b/files/style/conversation.scss
index 1b981e90..f36e5d97 100644
--- a/files/style/conversation.scss
+++ b/files/style/conversation.scss
@@ -38,3 +38,8 @@
 		margin-left: 10px;
 	}
 }
+
+.conversationList .columnInteractions {
+	display: flex;
+	flex-direction: column;
+}
diff --git a/templates/conversationList.tpl b/templates/conversationList.tpl
index bd0dd3ca..b2f605a4 100644
--- a/templates/conversationList.tpl
+++ b/templates/conversationList.tpl
@@ -1,4 +1,4 @@
-{capture assign='pageTitle'}{if $filter}{lang}wcf.conversation.folder.{$filter}{/lang}{else}{$__wcf->getActivePage()->getTitle()}{/if}{if $pageNo > 1} - {lang}wcf.page.pageNo{/lang}{/if}{/capture}
+{capture assign='pageTitle'}{if $filter}{lang}wcf.conversation.folder.{$filter}{/lang}{else}{$__wcf->getActivePage()->getTitle()}{/if}{/capture}
 
 {capture assign='contentHeader'}
 	<header class="contentHeader">
@@ -27,7 +27,7 @@
 {/capture}
 
 {capture assign='headContent'}
-	<link rel="alternate" type="application/rss+xml" title="{lang}wcf.global.button.rss{/lang}" href="{link controller='ConversationRssFeed'}at={@$__wcf->getUser()->userID}-{@$__wcf->getUser()->accessToken}{/link}">
+	<link rel="alternate" type="application/rss+xml" title="{lang}wcf.global.button.rss{/lang}" href="{link controller='ConversationRssFeed'}at={$__wcf->getUser()->userID}-{$__wcf->getUser()->accessToken}{/link}">
 {/capture}
 
 {capture assign='sidebarRight'}
@@ -54,60 +54,6 @@
 		</div>
 	</section>
 	
-	<section class="box">
-		<h2 class="boxTitle">{lang}wcf.conversation.filter.participants{/lang}</h2>
-		
-		<div class="boxContent">
-			<form action="{link controller='ConversationList'}{if $filter}filter={@$filter}&{/if}sortField={$sortField}&sortOrder={$sortOrder}&pageNo={@$pageNo}{/link}" method="post">
-				<dl>
-					<dt></dt>
-					<dd><label><textarea id="participants" name="participants" class="long">{implode from=$participants item=participant glue=','}{$participant}{/implode}</textarea></label></dd>
-				</dl>
-				
-				<div class="formSubmit">
-					<input type="submit" value="{lang}wcf.global.button.submit{/lang}" accesskey="s">
-					{csrfToken}
-				</div>
-			</form>
-		</div>
-	</section>
-	
-	<section class="box jsOnly">
-		<h2 class="boxTitle">{lang}wcf.conversation.label{/lang}</h2>
-		
-		<div class="boxContent">
-			<div id="conversationLabelFilter" class="dropdown">
-				<div class="dropdownToggle" data-toggle="conversationLabelFilter">
-					{if $labelID}
-						{foreach from=$labelList item=label}
-							{if $label->labelID == $labelID}
-								<span class="badge label{if $label->cssClassName} {$label->cssClassName}{/if}">{$label->label}</span>
-							{/if}
-						{/foreach}
-					{else}
-						<span class="badge">{lang}wcf.conversation.label.filter{/lang}</span>
-					{/if}
-				</div>
-				
-				<div class="dropdownMenu">
-					<ul class="scrollableDropdownMenu">
-						{foreach from=$labelList item=label}
-							<li><a href="{link controller='ConversationList'}{if $filter}filter={@$filter}&{/if}{if !$participants|empty}participants={implode from=$participants item=participant}{$participant|rawurlencode}{/implode}&{/if}sortField={$sortField}&sortOrder={$sortOrder}&pageNo={@$pageNo}&labelID={@$label->labelID}{/link}"><span class="badge label{if $label->cssClassName} {@$label->cssClassName}{/if}" data-css-class-name="{if $label->cssClassName}{@$label->cssClassName}{/if}" data-label-id="{$label->labelID}">{$label->label}</span></a></li>
-						{/foreach}
-					</ul>
-					<ul>
-						<li class="dropdownDivider"{if !$labelList|count} style="display: none;"{/if}></li>
-						<li><a href="{link controller='ConversationList'}{if $filter}filter={@$filter}&{/if}{if !$participants|empty}participants={implode from=$participants item=participant}{$participant|rawurlencode}{/implode}&{/if}sortField={$sortField}&sortOrder={$sortOrder}&pageNo={@$pageNo}{/link}"><span class="badge label">{lang}wcf.conversation.label.disableFilter{/lang}</span></a></li>
-					</ul>
-				</div>
-			</div>
-		</div>
-		
-		<div class="boxContent">
-			<button type="button" id="manageLabel" class="button">{lang}wcf.conversation.label.management{/lang}</button>
-		</div>
-	</section>
-	
 	{event name='beforeQuotaBox'}
 	
 	<section class="box conversationQuota">
@@ -130,276 +76,14 @@
 	{event name='boxes'}
 {/capture}
 
-{capture assign='contentInteractionPagination'}
-	{assign var='participantsParameter' value=''}
-	{if $participants}{capture assign='participantsParameter'}&participants={implode from=$participants item=participant}{$participant|rawurlencode}{/implode}{/capture}{/if}
-	{assign var='labelIDParameter' value=''}
-	{if $labelID}{assign var='labelIDParameter' value="&labelID=$labelID"}{/if}
-	{pages print=true assign=pagesLinks controller='ConversationList' link="filter=$filter$participantsParameter&pageNo=%d&sortField=$sortField&sortOrder=$sortOrder$labelIDParameter"}
-{/capture}
-
-{capture assign='contentInteractionButtons'}
-	<button type="button" class="markAllAsReadButton contentInteractionButton button small jsOnly">
-		{icon name='check'}
-		<span>{lang}wcf.global.button.markAllAsRead{/lang}</span>
-	</button>
-{/capture}
-
 {capture assign='contentInteractionDropdownItems'}
-	<li><a rel="alternate" href="{link controller='ConversationRssFeed'}at={@$__wcf->getUser()->userID}-{@$__wcf->getUser()->accessToken}{/link}">{lang}wcf.global.button.rss{/lang}</a></li>
+	<li><a rel="alternate" href="{link controller='ConversationRssFeed'}at={$__wcf->getUser()->userID}-{$__wcf->getUser()->accessToken}{/link}">{lang}wcf.global.button.rss{/lang}</a></li>
 {/capture}
 
 {include file='header'}
 
-{if !$items}
-	<woltlab-core-notice type="info">{lang}wcf.conversation.noConversations{/lang}</woltlab-core-notice>
-{else}
-	<div class="section tabularBox messageGroupList conversationList jsClipboardContainer" data-type="com.woltlab.wcf.conversation.conversation">
-		<ol class="tabularList">
-			<li class="tabularListRow tabularListRowHead">
-				<ol class="tabularListColumns">
-					<li class="columnMark jsOnly"><label><input type="checkbox" class="jsClipboardMarkAll"></label></li>
-					
-					<li class="columnSort">
-						<ul class="inlineList">
-							<li>
-								<a rel="nofollow" href="{link controller='ConversationList'}{if $filter}filter={@$filter}&{/if}{if !$participants|empty}participants={implode from=$participants item=participant}{$participant|rawurlencode}{/implode}&{/if}pageNo={@$pageNo}&sortField={$sortField}&sortOrder={if $sortOrder == 'ASC'}DESC{else}ASC{/if}{if $labelID}&labelID={@$labelID}{/if}{/link}">
-									{if $sortOrder === 'ASC'}
-										<span class="jsTooltip" title="{lang}wcf.global.sorting{/lang} ({lang}wcf.global.sortOrder.ascending{/lang})">
-											{icon name='arrow-down-wide-short'}
-										</span>
-									{else}
-										<span class="jsTooltip" title="{lang}wcf.global.sorting{/lang} ({lang}wcf.global.sortOrder.descending{/lang})">
-											{icon name='arrow-down-short-wide'}
-										</span>
-									{/if}
-								</a>
-							</li>
-							<li>
-								<div class="dropdown">
-									<span class="dropdownToggle">{if $sortField == 'subject'}{lang}wcf.global.subject{/lang}{else}{lang}wcf.conversation.{$sortField}{/lang}{/if}</span>
-									
-									<ul class="dropdownMenu">
-										{foreach from=$validSortFields item=_sortField}
-											<li{if $_sortField === $sortField} class="active"{/if}><a rel="nofollow" href="{link controller='ConversationList'}{if $filter}filter={@$filter}&{/if}{if !$participants|empty}participants={implode from=$participants item=participant}{$participant|rawurlencode}{/implode}&{/if}pageNo={@$pageNo}&sortField={$_sortField}&sortOrder={if $sortField === $_sortField}{if $sortOrder === 'DESC'}ASC{else}DESC{/if}{else}{$sortOrder}{/if}{if $labelID}&labelID={@$labelID}{/if}{/link}">{if $_sortField == 'subject'}{lang}wcf.global.subject{/lang}{else}{lang}wcf.conversation.{$_sortField}{/lang}{/if}</a></li>
-										{/foreach}
-									</ul>
-								</div>
-							</li>
-						</ul>
-					</li>
-				</ol>
-			</li>
-			
-			{foreach from=$objects item=conversation}
-				<li class="tabularListRow">
-					<ol class="tabularListColumns messageGroup conversation jsClipboardObject{if $conversation->isNew()} new{/if}" data-conversation-id="{$conversation->conversationID}" data-label-ids="[ {implode from=$conversation->getAssignedLabels() item=label}{$label->labelID}{/implode} ]" data-is-closed="{$conversation->isClosed}" data-can-close-conversation="{if $conversation->userID == $__wcf->getUser()->userID}1{else}0{/if}" data-can-add-participants="{if $conversation->canAddParticipants()}1{else}0{/if}">
-						<li class="columnMark jsOnly">
-							<label><input type="checkbox" class="jsClipboardItem" data-object-id="{$conversation->conversationID}"></label>
-						</li>
-						<li class="columnIcon columnAvatar">
-							{if $conversation->getUserProfile()->getAvatar()}
-								<div>
-									<p{if $conversation->isNew()} title="{lang}wcf.conversation.markAsRead.doubleClick{/lang}"{/if}>{@$conversation->getUserProfile()->getAvatar()->getImageTag(48)}</p>
-									
-									{if $conversation->ownPosts && $conversation->userID != $__wcf->user->userID}
-										{if $__wcf->getUserProfileHandler()->getAvatar()}
-											<small class="myAvatar jsTooltip" title="{lang}wcf.conversation.ownPosts{/lang}">{@$__wcf->getUserProfileHandler()->getAvatar()->getImageTag(24)}</small>
-										{/if}
-									{/if}
-								</div>
-							{/if}
-						</li>
-						<li class="columnSubject">
-							{hascontent}
-								<ul class="labelList">
-									{content}
-										{foreach from=$conversation->getAssignedLabels() item=label}
-											<li><a href="{link controller='ConversationList'}{if $filter}filter={@$filter}&{/if}{if !$participants|empty}participants={implode from=$participants item=participant}{$participant|rawurlencode}{/implode}&{/if}sortField={$sortField}&sortOrder={$sortOrder}&pageNo={@$pageNo}&labelID={@$label->labelID}{/link}" class="badge label{if $label->cssClassName} {@$label->cssClassName}{/if}">{$label->label}</a></li>
-										{/foreach}
-									{/content}
-								</ul>
-							{/hascontent}
-								
-							<h3>
-								<a href="{if $conversation->isNew()}{link controller='Conversation' object=$conversation}action=firstNew{/link}{else}{$conversation->getLink()}{/if}" class="conversationLink messageGroupLink" data-object-id="{$conversation->conversationID}">{$conversation->subject}</a>
-								{if $conversation->replies}
-									<span class="badge messageGroupCounterMobile">{@$conversation->replies|shortUnit}</span>
-								{/if}
-							</h3>
-							
-							<aside class="statusDisplay" role="presentation">
-								<ul class="statusIcons">
-									{if $conversation->isClosed}
-										<li>
-											<span class="jsIconLock jsTooltip" title="{lang}wcf.global.state.closed{/lang}">
-												{icon name='lock'}
-											</span>
-										</li>
-									{/if}
-									{if $conversation->attachments}
-										<li>
-											<span class="jsIconAttachment jsTooltip" title="{lang}wcf.conversation.attachments{/lang}">
-												{icon name='paperclip'}
-											</span>
-										</li>
-									{/if}
-								</ul>
-							</aside>
-							
-							<ul class="inlineList dotSeparated small messageGroupInfo">
-								<li class="messageGroupAuthor">{user object=$conversation->getUserProfile()}</li>
-								<li class="messageGroupTime">{time time=$conversation->time}</li>
-								<li class="messageGroupEditLink jsOnly"><a href="#" class="jsConversationInlineEditor">{lang}wcf.global.button.edit{/lang}</a></li>
-								{event name='messageGroupInfo'}
-							</ul>
-							
-							<ul class="messageGroupInfoMobile">
-								<li class="messageGroupAuthorMobile">{$conversation->username}</li>
-								<li class="messageGroupLastPostTimeMobile">{time time=$conversation->lastPostTime}</li>
-							</ul>
-							
-							{if $conversation->getParticipantSummary()|count}
-								<small class="conversationParticipantSummary">
-									{assign var='participantSummaryCount' value=$conversation->getParticipantSummary()|count}
-									{lang}wcf.conversation.participants{/lang}: {implode from=$conversation->getParticipantSummary() item=participant}<a href="{$participant->getLink()}" class="userLink{if $participant->hideConversation == 2} conversationLeft{/if}" data-object-id="{$participant->userID}">{$participant->username}</a>{/implode}
-									{if $participantSummaryCount < $conversation->participants}{lang}wcf.conversation.participants.other{/lang}{/if}
-								</small>
-							{/if}
-							
-							{event name='conversationData'}
-						</li>
-						<li class="columnStats">
-							<dl class="plain statsDataList">
-								<dt>{lang}wcf.conversation.replies{/lang}</dt>
-								<dd>{@$conversation->replies|shortUnit}</dd>
-							</dl>
-							<dl class="plain statsDataList">
-								<dt>{lang}wcf.conversation.participants{/lang}</dt>
-								<dd>{@$conversation->participants|shortUnit}</dd>
-							</dl>
-							
-							<div class="messageGroupListStatsSimple">
-								{if $conversation->replies}
-									<span aria-label="{lang}wcf.conversation.replies{/lang}">
-										{icon name='comment'}
-									</span>
-									{@$conversation->replies|shortUnit}
-								{/if}
-							</div>
-						</li>
-						<li class="columnLastPost">
-							{if $conversation->replies != 0 && $conversation->lastPostTime}
-								<div class="box32">
-									<a href="{link controller='Conversation' object=$conversation}action=lastPost{/link}" class="jsTooltip" title="{lang}wcf.conversation.gotoLastPost{/lang}">{@$conversation->getLastPosterProfile()->getAvatar()->getImageTag(32)}</a>
-									
-									<div>
-										<p>
-											{user object=$conversation->getLastPosterProfile()}
-										</p>
-										<small>{time time=$conversation->lastPostTime}</small>
-									</div>
-								</div>
-							{/if}
-						</li>
-						
-						{event name='columns'}
-					</ol>
-				</li>
-			{/foreach}
-		</ol>
-	</div>
-{/if}
-
-<footer class="contentFooter">
-	{hascontent}
-		<div class="paginationBottom">
-			{content}{@$pagesLinks}{/content}
-		</div>
-	{/hascontent}
-	
-	{hascontent}
-		<nav class="contentFooterNavigation">
-			<ul>
-				{content}
-					{if $__wcf->session->getPermission('user.conversation.canStartConversation')}
-						<li>
-							<a href="{link controller='ConversationAdd'}{/link}" title="{lang}wcf.conversation.add{/lang}" class="button buttonPrimary">
-								{icon name='plus'}
-								<span>{lang}wcf.conversation.button.add{/lang}</span>
-							</a>
-						</li>
-					{/if}
-					{event name='contentFooterNavigation'}
-				{/content}
-			</ul>
-		</nav>
-	{/hascontent}
-</footer>
-
-<script data-relocate="true" src="{$__wcf->getPath()}js/WCF.Conversation{if !ENABLE_DEBUG_MODE}.min{/if}.js?v={@LAST_UPDATE_TIME}"></script>
-<script data-relocate="true">
-	require([
-		'WoltLabSuite/Core/Language',
-		'WoltLabSuite/Core/Ui/ItemList/User',
-		'WoltLabSuite/Core/Controller/Clipboard',
-		'WoltLabSuite/Core/Conversation/Clipboard',
-	  	'WoltLabSuite/Core/Conversation/Component/Label/Manager',
-	], (
-		Language,
-		UiItemListUser,
-		ControllerClipboard,
-		ConversationClipboard,
-		{ LabelManager },
-	) => {
-		Language.addObject({
-			'wcf.conversation.edit.addParticipants': '{jslang}wcf.conversation.edit.addParticipants{/jslang}',
-			'wcf.conversation.edit.assignLabel': '{jslang}wcf.conversation.edit.assignLabel{/jslang}',
-			'wcf.conversation.edit.close': '{jslang}wcf.conversation.edit.close{/jslang}',
-			'wcf.conversation.edit.leave': '{jslang}wcf.conversation.edit.leave{/jslang}',
-			'wcf.conversation.edit.open': '{jslang}wcf.conversation.edit.open{/jslang}',
-			'wcf.conversation.edit.subject': '{jslang}wcf.conversation.edit.subject{/jslang}',
-			'wcf.conversation.label.management': '{jslang}wcf.conversation.label.management{/jslang}',
-			'wcf.conversation.label.management.addLabel.success': '{jslang}wcf.conversation.label.management.addLabel.success{/jslang}',
-			'wcf.conversation.label.placeholder': '{jslang}wcf.conversation.label.placeholder{/jslang}',
-			'wcf.conversation.leave.title': '{jslang}wcf.conversation.leave.title{/jslang}',
-			'wcf.global.state.closed': '{jslang}wcf.global.state.closed{/jslang}',
-			'wcf.global.subject': '{jslang}wcf.global.subject{/jslang}',
-			'wcf.conversation.label.assignLabels': '{jslang}wcf.conversation.label.assignLabels{/jslang}'
-		});
-		
-		ControllerClipboard.setup({
-			pageClassName: 'wcf\\page\\ConversationListPage',
-			hasMarkedItems: {if $hasMarkedItems}true{else}false{/if},
-		});
-
-		const availableLabels = [{implode from=$labelList item=label}{ cssClassName: '{if $label->cssClassName}{unsafe:$label->cssClassName|encodeJS}{/if}', labelID: {@$label->labelID}, label: '{$label->label|encodeJS}', url: '{link controller='ConversationList' encode=false}labelID={$label->labelID}{if $filter}&filter={@$filter}&{/if}{if !$participants|empty}participants={implode from=$participants item=participant}{$participant|rawurlencode}{/implode}&{/if}sortField={$sortField}&sortOrder={$sortOrder}&pageNo={@$pageNo}{/link}' }{/implode} ];
-		var $editorHandler = new WCF.Conversation.EditorHandler(availableLabels);
-		var $inlineEditor = new WCF.Conversation.InlineEditor('.conversation');
-		$inlineEditor.setEditorHandler($editorHandler, 'list');
-
-		ConversationClipboard.setup($editorHandler);
-		new LabelManager('{link controller='ConversationLabelForm'}{/link}', '{link controller='ConversationList' encode=false}{if $filter}filter={@$filter}&{/if}{if !$participants|empty}participants={implode from=$participants item=participant}{$participant|rawurlencode}{/implode}&{/if}sortField={$sortField}&sortOrder={$sortOrder}&pageNo={@$pageNo}{/link}');
-		
-		// mobile safari hover workaround
-		if ($(window).width() <= 800) {
-			$('.sidebar').addClass('mobileSidebar').hover(function() { });
-		}
-		
-		UiItemListUser.init('participants', {
-			excludedSearchValues: ['{$__wcf->user->username|encodeJS}'],
-			maxItems: 20
-		});
-	});
-</script>
-
-<script data-relocate="true">
-	require(['WoltLabSuite/Core/Conversation/Ui/MarkAsRead'], (MarkAsRead) => {
-		MarkAsRead.setup();
-	});
-	require(['WoltLabSuite/Core/Conversation/Ui/MarkAllAsRead'], (MarkAllAsRead) => {
-		MarkAllAsRead.setup();
-	});
-</script>
+<div class="section messageGroupList conversationList">
+	{unsafe:$listView->render()}
+</div>
 
 {include file='footer'}
diff --git a/templates/conversationListItems.tpl b/templates/conversationListItems.tpl
new file mode 100644
index 00000000..d93421af
--- /dev/null
+++ b/templates/conversationListItems.tpl
@@ -0,0 +1,121 @@
+{foreach from=$view->getItems() item=conversation}
+	<div class="listView__item tabularListRow" data-object-id="{$conversation->getObjectID()}">
+		<ol class="tabularListColumns messageGroup conversation jsClipboardObject{if $conversation->isNew()} new{/if}" data-conversation-id="{$conversation->conversationID}" data-label-ids="[ {implode from=$conversation->getAssignedLabels() item=label}{$label->labelID}{/implode} ]" data-is-closed="{$conversation->isClosed}" data-can-close-conversation="{if $conversation->userID == $__wcf->getUser()->userID}1{else}0{/if}" data-can-add-participants="{if $conversation->canAddParticipants()}1{else}0{/if}">
+			<li class="columnInteractions">
+				{if $view->hasBulkInteractions()}
+					<label class="button small jsTooltip" title="{lang}wcf.clipboard.item.mark{/lang}">
+						<input type="checkbox" class="listView__selectItem" aria-label="{lang}wcf.clipboard.item.mark{/lang}">
+					</label>
+				{/if}
+
+				{unsafe:$view->renderInteractionContextMenuButton($conversation)}
+			</li>
+			<li class="columnIcon columnAvatar">
+				{if $conversation->getUserProfile()->getAvatar()}
+					<div>
+						<p{if $conversation->isNew()} title="{lang}wcf.conversation.markAsRead.doubleClick{/lang}"{/if}>{unsafe:$conversation->getUserProfile()->getAvatar()->getImageTag(48)}</p>
+
+						{if $conversation->ownPosts && $conversation->userID != $__wcf->user->userID}
+							{if $__wcf->getUserProfileHandler()->getAvatar()}
+								<small class="myAvatar jsTooltip" title="{lang}wcf.conversation.ownPosts{/lang}">{unsafe:$__wcf->getUserProfileHandler()->getAvatar()->getImageTag(24)}</small>
+							{/if}
+						{/if}
+					</div>
+				{/if}
+			</li>
+			<li class="columnSubject">
+				{hascontent}
+					<ul class="labelList">
+						{content}
+							{foreach from=$conversation->getAssignedLabels() item=label}
+								<li><span class="badge label{if $label->cssClassName} {$label->cssClassName}{/if}">{$label->label}</span></li>
+							{/foreach}
+						{/content}
+					</ul>
+				{/hascontent}
+
+				<h3>
+					<a href="{if $conversation->isNew()}{link controller='Conversation' object=$conversation action='firstNew'}{/link}{else}{$conversation->getLink()}{/if}" class="conversationLink messageGroupLink" data-object-id="{$conversation->conversationID}">{$conversation->subject}</a>
+					{if $conversation->replies}
+						<span class="badge messageGroupCounterMobile">{$conversation->replies|shortUnit}</span>
+					{/if}
+				</h3>
+
+				<aside class="statusDisplay" role="presentation">
+					<ul class="statusIcons">
+						{if $conversation->isClosed}
+							<li>
+								<span class="jsIconLock jsTooltip" title="{lang}wcf.global.state.closed{/lang}">
+									{icon name='lock'}
+								</span>
+							</li>
+						{/if}
+						{if $conversation->attachments}
+							<li>
+								<span class="jsIconAttachment jsTooltip" title="{lang}wcf.conversation.attachments{/lang}">
+									{icon name='paperclip'}
+								</span>
+							</li>
+						{/if}
+					</ul>
+				</aside>
+
+				<ul class="inlineList dotSeparated small messageGroupInfo">
+					<li class="messageGroupAuthor">{user object=$conversation->getUserProfile()}</li>
+					<li class="messageGroupTime">{time time=$conversation->time}</li>
+					{event name='messageGroupInfo'}
+				</ul>
+
+				<ul class="messageGroupInfoMobile">
+					<li class="messageGroupAuthorMobile">{$conversation->username}</li>
+					<li class="messageGroupLastPostTimeMobile">{time time=$conversation->lastPostTime}</li>
+				</ul>
+
+				{if $conversation->getParticipantSummary()|count}
+					<small class="conversationParticipantSummary">
+						{assign var='participantSummaryCount' value=$conversation->getParticipantSummary()|count}
+						{lang}wcf.conversation.participants{/lang}: {implode from=$conversation->getParticipantSummary() item=participant}<a href="{$participant->getLink()}" class="userLink{if $participant->hideConversation == 2} conversationLeft{/if}" data-object-id="{$participant->userID}">{$participant->username}</a>{/implode}
+						{if $participantSummaryCount < $conversation->participants}{lang}wcf.conversation.participants.other{/lang}{/if}
+					</small>
+				{/if}
+
+				{event name='conversationData'}
+			</li>
+			<li class="columnStats">
+				<dl class="plain statsDataList">
+					<dt>{lang}wcf.conversation.replies{/lang}</dt>
+					<dd>{$conversation->replies|shortUnit}</dd>
+				</dl>
+				<dl class="plain statsDataList">
+					<dt>{lang}wcf.conversation.participants{/lang}</dt>
+					<dd>{$conversation->participants|shortUnit}</dd>
+				</dl>
+
+				<div class="messageGroupListStatsSimple">
+					{if $conversation->replies}
+						<span aria-label="{lang}wcf.conversation.replies{/lang}">
+							{icon name='comment'}
+						</span>
+						{$conversation->replies|shortUnit}
+					{/if}
+				</div>
+			</li>
+			<li class="columnLastPost">
+				{if $conversation->replies != 0 && $conversation->lastPostTime}
+					<div class="box32">
+						<a href="{link controller='Conversation' object=$conversation}action=lastPost{/link}" class="jsTooltip" title="{lang}wcf.conversation.gotoLastPost{/lang}">{@$conversation->getLastPosterProfile()->getAvatar()->getImageTag(32)}</a>
+
+						<div>
+							<p>
+								{user object=$conversation->getLastPosterProfile()}
+							</p>
+							<small>{time time=$conversation->lastPostTime}</small>
+						</div>
+					</div>
+				{/if}
+			</li>
+
+			{event name='columns'}
+		</ol>
+	</div>
+{/foreach}
diff --git a/templates/shared_conversationLabelFormField.tpl b/templates/shared_conversationLabelFormField.tpl
new file mode 100644
index 00000000..101495cf
--- /dev/null
+++ b/templates/shared_conversationLabelFormField.tpl
@@ -0,0 +1,38 @@
+<ul class="labelList jsOnly">
+	<li class="dropdown labelChooser">
+		<div class="dropdownToggle">
+			<span class="badge label">{lang}wcf.label.none{/lang}</span>
+		</div>
+		<div class="dropdownMenu">
+			<ul class="scrollableDropdownMenu">
+				{foreach from=$field->getLabels() item=label}
+					<li data-label-id="{$label->labelID}">
+						<span>{unsafe:$label->render()}</span>
+					</li>
+				{/foreach}
+			</ul>
+		</div>
+	</li>
+</ul>
+
+<noscript>
+	<select name="{$field->getPrefixedId()}">
+		{foreach from=$field->getLabels() item=label}
+			<option value="{$label->labelID}">{$label->label}</option>
+		{/foreach}
+	</select>
+</noscript>
+
+<script data-relocate="true">
+	require(['Language', 'WoltLabSuite/Core/Form/Builder/Field/Controller/Label'], (Language, FormBuilderFieldLabel) => {
+		Language.addObject({
+			'wcf.label.none': '{jslang}wcf.label.none{/jslang}',
+			'wcf.label.withoutSelection': '{jslang}wcf.label.withoutSelection{/jslang}'
+		});
+
+		new FormBuilderFieldLabel(
+			'{unsafe:$field->getPrefixedId()|encodeJS}',
+			{if $field->getValue()}'{unsafe:$field->getValue()|encodeJS}'{else}null{/if},
+		);
+	});
+</script>

From dbc04a2c72d50c39becccdc15e91b9021fe7ecbb Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Wed, 25 Jun 2025 12:52:02 +0200
Subject: [PATCH 02/24] Implement interaction to edit conversation subject

---
 ...tSubjectConversationDialogAction.class.php | 90 +++++++++++++++++++
 .../command/SetConversationSubject.class.php  | 42 +++++++++
 .../user/ConversationInteractions.class.php   | 13 ++-
 3 files changed, 142 insertions(+), 3 deletions(-)
 create mode 100644 files/lib/action/EditSubjectConversationDialogAction.class.php
 create mode 100644 files/lib/system/conversation/command/SetConversationSubject.class.php

diff --git a/files/lib/action/EditSubjectConversationDialogAction.class.php b/files/lib/action/EditSubjectConversationDialogAction.class.php
new file mode 100644
index 00000000..89fc33be
--- /dev/null
+++ b/files/lib/action/EditSubjectConversationDialogAction.class.php
@@ -0,0 +1,90 @@
+<?php
+
+namespace wcf\action;
+
+use CuyZ\Valinor\Mapper\MappingError;
+use Laminas\Diactoros\Response\JsonResponse;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use wcf\data\conversation\Conversation;
+use wcf\http\Helper;
+use wcf\system\conversation\command\SetConversationSubject;
+use wcf\system\exception\IllegalLinkException;
+use wcf\system\exception\PermissionDeniedException;
+use wcf\system\form\builder\field\TextFormField;
+use wcf\system\form\builder\Psr15DialogForm;
+use wcf\system\WCF;
+
+/**
+ * Form dialog to edit the subject of a conversation.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class EditSubjectConversationDialogAction implements RequestHandlerInterface
+{
+    #[\Override]
+    public function handle(ServerRequestInterface $request): ResponseInterface
+    {
+        try {
+            $parameters = Helper::mapQueryParameters(
+                $request->getQueryParams(),
+                <<<'EOT'
+                array {
+                    id: positive-int,
+                }
+                EOT
+            );
+        } catch (MappingError) {
+            throw new IllegalLinkException();
+        }
+
+        $conversation = new Conversation($parameters['id']);
+
+        if ($conversation->userID !== WCF::getUser()->userID) {
+            throw new PermissionDeniedException();
+        }
+
+        $form = $this->getForm($conversation);
+
+        if ($request->getMethod() === 'GET') {
+            return $form->toResponse();
+        } elseif ($request->getMethod() === 'POST') {
+            $response = $form->validateRequest($request);
+            if ($response !== null) {
+                return $response;
+            }
+            $data = $form->getData()['data'];
+
+            (new SetConversationSubject($conversation, $data['subject']))();
+
+            return new JsonResponse([]);
+        } else {
+            throw new \LogicException('Unreachable');
+        }
+    }
+
+    private function getForm(Conversation $conversation): Psr15DialogForm
+    {
+        $form = new Psr15DialogForm(
+            static::class,
+            WCF::getLanguage()->get('wcf.conversation.edit.subject')
+        );
+
+        $form->appendChildren([
+            TextFormField::create('subject')
+                ->label('wcf.global.subject')
+                ->maximumLength(255)
+                ->required(),
+        ]);
+
+        $form->markRequiredFields(false);
+        $form->updatedObject($conversation);
+        $form->build();
+
+        return $form;
+    }
+}
diff --git a/files/lib/system/conversation/command/SetConversationSubject.class.php b/files/lib/system/conversation/command/SetConversationSubject.class.php
new file mode 100644
index 00000000..048f35f5
--- /dev/null
+++ b/files/lib/system/conversation/command/SetConversationSubject.class.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace wcf\system\conversation\command;
+
+use wcf\data\conversation\Conversation;
+use wcf\data\conversation\ConversationEditor;
+use wcf\system\search\SearchIndexManager;
+
+/**
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class SetConversationSubject
+{
+    public function __construct(
+        public readonly Conversation $conversation,
+        public readonly string $subject,
+    ) {
+    }
+
+    public function __invoke(): void
+    {
+        $editor = new ConversationEditor($this->conversation);
+        $editor->update([
+            'subject' => $this->subject,
+        ]);
+
+        $message = $this->conversation->getFirstMessage();
+
+        SearchIndexManager::getInstance()->set(
+            'com.woltlab.wcf.conversation.message',
+            $message->messageID,
+            $message->message,
+            $this->subject,
+            $message->time,
+            $message->userID,
+            $message->username
+        );
+    }
+}
diff --git a/files/lib/system/interaction/user/ConversationInteractions.class.php b/files/lib/system/interaction/user/ConversationInteractions.class.php
index 4de1f507..0860912c 100644
--- a/files/lib/system/interaction/user/ConversationInteractions.class.php
+++ b/files/lib/system/interaction/user/ConversationInteractions.class.php
@@ -3,14 +3,16 @@
 namespace wcf\system\interaction\user;
 
 use wcf\action\AssignConversationLabelDialogAction;
-use wcf\data\conversation\Conversation;
+use wcf\action\EditSubjectConversationDialogAction;
 use wcf\data\conversation\label\ConversationLabel;
+use wcf\data\conversation\ViewableConversation;
 use wcf\event\interaction\user\ConversationInteractionCollecting;
 use wcf\system\event\EventHandler;
 use wcf\system\interaction\AbstractInteractionProvider;
 use wcf\system\interaction\Divider;
 use wcf\system\interaction\FormBuilderDialogInteraction;
 use wcf\system\request\LinkHandler;
+use wcf\system\WCF;
 
 /**
  * Interaction provider for conversations.
@@ -27,7 +29,12 @@ public function __construct()
         $labelList = ConversationLabel::getLabelsByUser();
 
         $this->addInteractions([
-            // TODO edit subject `wcf.conversation.edit.subject`
+            new FormBuilderDialogInteraction(
+                'editSubject',
+                LinkHandler::getInstance()->getControllerLink(EditSubjectConversationDialogAction::class, ['id' => '%s']),
+                'wcf.conversation.edit.subject',
+                static fn (ViewableConversation $conversation) => WCF::getUser()->userID === $conversation->userID,
+            ),
             // TODO close `wcf.conversation.edit.close`
             // TODO open `wcf.conversation.edit.open`
             new FormBuilderDialogInteraction(
@@ -49,6 +56,6 @@ public function __construct()
     #[\Override]
     public function getObjectClassName(): string
     {
-        return Conversation::class;
+        return ViewableConversation::class;
     }
 }

From e5b4b3647a6db0ae4c55c1faa61658b8e985a0e0 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Wed, 25 Jun 2025 13:25:41 +0200
Subject: [PATCH 03/24] Refactor conversation list styles

---
 files/style/conversation.scss       | 32 ++++++++++++++++++++++++++---
 templates/conversationListItems.tpl |  8 ++++----
 2 files changed, 33 insertions(+), 7 deletions(-)

diff --git a/files/style/conversation.scss b/files/style/conversation.scss
index f36e5d97..bcf0ef87 100644
--- a/files/style/conversation.scss
+++ b/files/style/conversation.scss
@@ -39,7 +39,33 @@
 	}
 }
 
-.conversationList .columnInteractions {
-	display: flex;
-	flex-direction: column;
+.conversationList {
+	.columnInteractions {
+		display: flex;
+		flex-direction: column;
+	}
+
+	@include screen-sm-down {
+		.conversationList_columnSubject {
+			flex-basis: calc(100% - 80px) !important;
+			max-width: calc(100% - 80px) !important;
+		}
+		.conversationList_columnAvatar {
+			margin-left: 5px;
+			margin-right: 5px !important;
+		}
+	}
+
+	/* revert style from `messageGroup.scss` */
+	@include screen-md-up {
+		&.messageGroupList .pagination {
+			font-size: inherit;
+		}
+	}
+	.pagination {
+		flex: inherit;
+		opacity: inherit;
+		transition: inherit;
+		font-weight: inherit;
+	}
 }
diff --git a/templates/conversationListItems.tpl b/templates/conversationListItems.tpl
index d93421af..2be39db1 100644
--- a/templates/conversationListItems.tpl
+++ b/templates/conversationListItems.tpl
@@ -1,6 +1,6 @@
 {foreach from=$view->getItems() item=conversation}
 	<div class="listView__item tabularListRow" data-object-id="{$conversation->getObjectID()}">
-		<ol class="tabularListColumns messageGroup conversation jsClipboardObject{if $conversation->isNew()} new{/if}" data-conversation-id="{$conversation->conversationID}" data-label-ids="[ {implode from=$conversation->getAssignedLabels() item=label}{$label->labelID}{/implode} ]" data-is-closed="{$conversation->isClosed}" data-can-close-conversation="{if $conversation->userID == $__wcf->getUser()->userID}1{else}0{/if}" data-can-add-participants="{if $conversation->canAddParticipants()}1{else}0{/if}">
+		<ol class="tabularListColumns messageGroup conversation{if $conversation->isNew()} new{/if}">
 			<li class="columnInteractions">
 				{if $view->hasBulkInteractions()}
 					<label class="button small jsTooltip" title="{lang}wcf.clipboard.item.mark{/lang}">
@@ -10,7 +10,7 @@
 
 				{unsafe:$view->renderInteractionContextMenuButton($conversation)}
 			</li>
-			<li class="columnIcon columnAvatar">
+			<li class="columnIcon columnAvatar conversationList_columnAvatar">
 				{if $conversation->getUserProfile()->getAvatar()}
 					<div>
 						<p{if $conversation->isNew()} title="{lang}wcf.conversation.markAsRead.doubleClick{/lang}"{/if}>{unsafe:$conversation->getUserProfile()->getAvatar()->getImageTag(48)}</p>
@@ -23,7 +23,7 @@
 					</div>
 				{/if}
 			</li>
-			<li class="columnSubject">
+			<li class="columnSubject conversationList_columnSubject">
 				{hascontent}
 					<ul class="labelList">
 						{content}
@@ -103,7 +103,7 @@
 			<li class="columnLastPost">
 				{if $conversation->replies != 0 && $conversation->lastPostTime}
 					<div class="box32">
-						<a href="{link controller='Conversation' object=$conversation}action=lastPost{/link}" class="jsTooltip" title="{lang}wcf.conversation.gotoLastPost{/lang}">{@$conversation->getLastPosterProfile()->getAvatar()->getImageTag(32)}</a>
+						<a href="{link controller='Conversation' object=$conversation action="lastPost"}{/link}" class="jsTooltip" title="{lang}wcf.conversation.gotoLastPost{/lang}">{unsafe:$conversation->getLastPosterProfile()->getAvatar()->getImageTag(32)}</a>
 
 						<div>
 							<p>

From e56a1b182a11e47f23065142b0458ddfad36bed4 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Wed, 25 Jun 2025 14:00:56 +0200
Subject: [PATCH 04/24] Add dialog and command to add participants to
 conversations

---
 ...ticipantConversationDialogAction.class.php | 140 ++++++++++++++++++
 files/lib/form/ConversationAddForm.class.php  |  23 +--
 .../AddParticipantConversation.class.php      |  54 +++++++
 .../user/ConversationInteractions.class.php   |   8 +-
 4 files changed, 215 insertions(+), 10 deletions(-)
 create mode 100644 files/lib/action/AddParticipantConversationDialogAction.class.php
 create mode 100644 files/lib/system/conversation/command/AddParticipantConversation.class.php

diff --git a/files/lib/action/AddParticipantConversationDialogAction.class.php b/files/lib/action/AddParticipantConversationDialogAction.class.php
new file mode 100644
index 00000000..d9d18d16
--- /dev/null
+++ b/files/lib/action/AddParticipantConversationDialogAction.class.php
@@ -0,0 +1,140 @@
+<?php
+
+namespace wcf\action;
+
+use CuyZ\Valinor\Mapper\MappingError;
+use Laminas\Diactoros\Response\JsonResponse;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use wcf\data\conversation\Conversation;
+use wcf\data\user\group\UserGroup;
+use wcf\form\ConversationAddForm;
+use wcf\http\Helper;
+use wcf\system\cache\builder\UserGroupCacheBuilder;
+use wcf\system\conversation\command\AddParticipantConversation;
+use wcf\system\exception\IllegalLinkException;
+use wcf\system\exception\PermissionDeniedException;
+use wcf\system\form\builder\field\BooleanFormField;
+use wcf\system\form\builder\field\dependency\NonEmptyFormFieldDependency;
+use wcf\system\form\builder\field\MultipleSelectionFormField;
+use wcf\system\form\builder\field\RadioButtonFormField;
+use wcf\system\form\builder\field\user\UserFormField;
+use wcf\system\form\builder\Psr15DialogForm;
+use wcf\system\WCF;
+
+/**
+ * Form dialog to add participants to a conversation.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class AddParticipantConversationDialogAction implements RequestHandlerInterface
+{
+    #[\Override]
+    public function handle(ServerRequestInterface $request): ResponseInterface
+    {
+        try {
+            $parameters = Helper::mapQueryParameters(
+                $request->getQueryParams(),
+                <<<'EOT'
+                array {
+                    id: positive-int,
+                }
+                EOT
+            );
+        } catch (MappingError) {
+            throw new IllegalLinkException();
+        }
+
+        $conversation = new Conversation($parameters['id']);
+
+        if (!Conversation::isParticipant([$conversation->conversationID]) || !$conversation->canAddParticipants()) {
+            throw new PermissionDeniedException();
+        }
+
+        $form = $this->getForm($conversation);
+
+        if ($request->getMethod() === 'GET') {
+            return $form->toResponse();
+        } elseif ($request->getMethod() === 'POST') {
+            $response = $form->validateRequest($request);
+            if ($response !== null) {
+                return $response;
+            }
+
+            $data = $form->getData();
+
+            $messageVisibility = $data['data']['messageVisibility'] ?? 'new';
+            $participants = $data['participants'] ?? [];
+            if (isset($data['participantGroups'])) {
+                $groupIDs = $data['participantGroups'];
+                $participants = \array_unique(
+                    \array_merge(
+                        $participants,
+                        ConversationAddForm::getUserByGroups($groupIDs)
+                    )
+                );
+            }
+
+            (new AddParticipantConversation($conversation, $participants, $messageVisibility))();
+
+            return new JsonResponse([]);
+        } else {
+            throw new \LogicException('Unreachable');
+        }
+    }
+
+    private function getForm(Conversation $conversation): Psr15DialogForm
+    {
+        $form = new Psr15DialogForm(
+            static::class,
+            WCF::getLanguage()->get('wcf.conversation.edit.addParticipants')
+        );
+
+        $groupParticipants = \array_filter(
+            UserGroupCacheBuilder::getInstance()->getData([], 'groups'),
+            // @phpstan-ignore property.notFound
+            static fn (UserGroup $group) => $group->canBeAddedAsConversationParticipant
+        );
+
+        $form->appendChildren([
+            UserFormField::create('participants')
+                ->label('wcf.conversation.participants')
+                ->description('wcf.conversation.participants.description')
+                ->maximumMultiples(WCF::getSession()->getPermission('user.conversation.maxParticipants'))
+                ->multiple()
+                ->maximumMultiples(WCF::getSession()->getPermission('user.conversation.maxParticipants') - $conversation->participants)
+                ->addValidator(ConversationAddForm::getParticipantsValidator())
+                ->addValidator(ConversationAddForm::getMaximumParticipantsValidator(invisibleParticipantGroupsFieldId: null)),
+            BooleanFormField::create('addGroupParticipants')
+                ->label('wcf.conversation.addGroupParticipants')
+                ->available(\count($groupParticipants) > 0),
+            MultipleSelectionFormField::create('participantGroups')
+                ->label('wcf.conversation.participantGroups')
+                ->available(WCF::getSession()->getPermission('user.conversation.canAddGroupParticipants'))
+                ->filterable()
+                ->options($groupParticipants)
+                ->addDependency(
+                    NonEmptyFormFieldDependency::create('addGroupParticipantsDependency')
+                        ->fieldId('addGroupParticipants')
+                ),
+            RadioButtonFormField::create('messageVisibility')
+                ->label('wcf.conversation.visibility')
+                ->available(!$conversation->isDraft && $conversation->canAddParticipantsUnrestricted())
+                ->required()
+                ->options([
+                    'all' => 'wcf.conversation.visibility.all',
+                    'new' => 'wcf.conversation.visibility.new',
+                ])
+                ->value('all'),
+        ]);
+
+        $form->markRequiredFields(false);
+        $form->build();
+
+        return $form;
+    }
+}
diff --git a/files/lib/form/ConversationAddForm.class.php b/files/lib/form/ConversationAddForm.class.php
index 5803f874..28e305c1 100644
--- a/files/lib/form/ConversationAddForm.class.php
+++ b/files/lib/form/ConversationAddForm.class.php
@@ -350,7 +350,7 @@ public static function getParticipantsValidator(): FormFieldValidator
     public static function getMaximumParticipantsValidator(
         string $invisibleParticipantsFieldId = 'invisibleParticipants',
         string $participantGroupsFieldId = 'participantGroups',
-        string $invisibleParticipantGroupsFieldId = 'invisibleParticipantGroups'
+        ?string $invisibleParticipantGroupsFieldId = 'invisibleParticipantGroups'
     ): FormFieldValidator {
         return new FormFieldValidator(
             'participantsMaximumValidator',
@@ -359,18 +359,19 @@ static function (UserFormField $formField) use (
                 $participantGroupsFieldId,
                 $invisibleParticipantGroupsFieldId
             ) {
-                /**
-                 * @var UserFormField|null              $invisibleParticipantsFormField
-                 * @var MultipleSelectionFormField|null $participantGroupsFormField
-                 * @var MultipleSelectionFormField|null $invisibleParticipantGroupsFormField
-                 */
-
                 $invisibleParticipantsFormField = $formField->getDocument()
                     ->getNodeById($invisibleParticipantsFieldId);
                 $participantGroupsFormField = $formField->getDocument()
                     ->getNodeById($participantGroupsFieldId);
-                $invisibleParticipantGroupsFormField = $formField->getDocument()
-                    ->getNodeById($invisibleParticipantGroupsFieldId);
+                $isDraftFormField = $formField->getDocument()->getNodeById('isDraft');
+                $invisibleParticipantGroupsFormField = $invisibleParticipantGroupsFieldId !== null ? $formField->getDocument()
+                    ->getNodeById($invisibleParticipantGroupsFieldId) : null;
+
+                \assert($invisibleParticipantsFormField === null || $invisibleParticipantsFormField instanceof UserFormField);
+                \assert($isDraftFormField === null || $isDraftFormField instanceof BooleanFormField);
+                \assert($participantGroupsFormField === null || $participantGroupsFormField instanceof MultipleSelectionFormField);
+                \assert($invisibleParticipantGroupsFormField === null || $invisibleParticipantGroupsFormField instanceof MultipleSelectionFormField);
+
                 $groupIDs = \array_merge(
                     $participantGroupsFormField?->getValue() ?: [],
                     $invisibleParticipantGroupsFormField?->getValue() ?: [],
@@ -389,6 +390,10 @@ static function (UserFormField $formField) use (
                         )
                     );
                 }
+
+                if ($userIDs === []) {
+                    $formField->addValidationError(new FormFieldValidationError('empty'));
+                }
             }
         );
     }
diff --git a/files/lib/system/conversation/command/AddParticipantConversation.class.php b/files/lib/system/conversation/command/AddParticipantConversation.class.php
new file mode 100644
index 00000000..e650b30e
--- /dev/null
+++ b/files/lib/system/conversation/command/AddParticipantConversation.class.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace wcf\system\conversation\command;
+
+use wcf\data\conversation\Conversation;
+use wcf\data\conversation\ConversationAction;
+use wcf\data\conversation\ConversationEditor;
+use wcf\system\log\modification\ConversationModificationLogHandler;
+
+/**
+ * Command to add participants to a conversation.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class AddParticipantConversation
+{
+    public function __construct(
+        public readonly Conversation $conversation,
+        /**
+         * @var int[]
+         */
+        public readonly array $participants,
+        /**
+         * @var 'new'|'all'
+         */
+        public readonly ?string $messageVisibility
+    ) {
+    }
+
+    public function __invoke(): void
+    {
+        if ($this->conversation->isDraft) {
+            $draftData = \unserialize($this->conversation->draftData);
+            $draftData['participants'] = \array_merge($draftData['participants'], $this->participants);
+            $data = ['data' => ['draftData' => \serialize($draftData)]];
+        } else {
+            $data = [
+                'participants' => $this->participants,
+                'visibility' => $this->messageVisibility,
+            ];
+        }
+
+        (new ConversationAction([$this->conversation], 'update', $data))->executeAction();
+
+        ConversationModificationLogHandler::getInstance()->addParticipants($this->conversation, $this->participants);
+
+        if (!$this->conversation->isDraft) {
+            (new ConversationEditor($this->conversation))->updateParticipantSummary();
+        }
+    }
+}
diff --git a/files/lib/system/interaction/user/ConversationInteractions.class.php b/files/lib/system/interaction/user/ConversationInteractions.class.php
index 0860912c..3c1a1ca9 100644
--- a/files/lib/system/interaction/user/ConversationInteractions.class.php
+++ b/files/lib/system/interaction/user/ConversationInteractions.class.php
@@ -2,6 +2,7 @@
 
 namespace wcf\system\interaction\user;
 
+use wcf\action\AddParticipantConversationDialogAction;
 use wcf\action\AssignConversationLabelDialogAction;
 use wcf\action\EditSubjectConversationDialogAction;
 use wcf\data\conversation\label\ConversationLabel;
@@ -44,7 +45,12 @@ public function __construct()
                 static fn () => $labelList->count() > 0,
             ),
             new Divider(),
-            // TODO add a participant `wcf.conversation.edit.addParticipants`
+            new FormBuilderDialogInteraction(
+                'addParticipants',
+                LinkHandler::getInstance()->getControllerLink(AddParticipantConversationDialogAction::class, ['id' => '%s']),
+                'wcf.conversation.edit.addParticipants',
+                static fn (ViewableConversation $conversation) => $conversation->canAddParticipants(),
+            ),
             // TODO leave `wcf.conversation.edit.leave`
         ]);
 

From f8b688e4f650278e262ee377279ed5a074201a2a Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Wed, 25 Jun 2025 14:20:49 +0200
Subject: [PATCH 05/24] Add endpoints for leaving and restoring conversations

---
 .../com.woltlab.wcf.conversation.php          |  2 +
 .../conversations/LeaveConversation.class.php | 24 +----------
 .../LeavePermanentlyConversation.class.php    | 42 +++++++++++++++++++
 .../RestoreConversation.class.php             | 42 +++++++++++++++++++
 .../user/ConversationInteractions.class.php   | 24 ++++++++++-
 5 files changed, 111 insertions(+), 23 deletions(-)
 create mode 100644 files/lib/system/endpoint/controller/core/conversations/LeavePermanentlyConversation.class.php
 create mode 100644 files/lib/system/endpoint/controller/core/conversations/RestoreConversation.class.php

diff --git a/files/lib/bootstrap/com.woltlab.wcf.conversation.php b/files/lib/bootstrap/com.woltlab.wcf.conversation.php
index b0267675..0fe63bba 100644
--- a/files/lib/bootstrap/com.woltlab.wcf.conversation.php
+++ b/files/lib/bootstrap/com.woltlab.wcf.conversation.php
@@ -41,6 +41,8 @@ static function (\wcf\event\user\profile\UserProfileHeaderInteractionOptionColle
         static function (\wcf\event\endpoint\ControllerCollecting $event) {
             $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationPopover());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\LeaveConversation());
+            $event->register(new \wcf\system\endpoint\controller\core\conversations\LeavePermanentlyConversation());
+            $event->register(new \wcf\system\endpoint\controller\core\conversations\RestoreConversation());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationLeaveDialog());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationLabels());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\AssignConversationLabels());
diff --git a/files/lib/system/endpoint/controller/core/conversations/LeaveConversation.class.php b/files/lib/system/endpoint/controller/core/conversations/LeaveConversation.class.php
index b7220e60..c08f7e90 100644
--- a/files/lib/system/endpoint/controller/core/conversations/LeaveConversation.class.php
+++ b/files/lib/system/endpoint/controller/core/conversations/LeaveConversation.class.php
@@ -10,7 +10,6 @@
 use wcf\system\endpoint\IController;
 use wcf\system\endpoint\PostRequest;
 use wcf\system\exception\PermissionDeniedException;
-use wcf\system\request\LinkHandler;
 
 /**
  * API endpoint for leaving a conversation.
@@ -19,8 +18,6 @@
  * @copyright   2001-2025 WoltLab GmbH
  * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  * @since       6.2
- *
- * TODO remove
  */
 #[PostRequest('/core/conversations/{id:\d+}/leave')]
 final class LeaveConversation implements IController
@@ -31,14 +28,9 @@ public function __invoke(ServerRequestInterface $request, array $variables): Res
         $conversation = Helper::fetchObjectFromRequestParameter($variables['id'], Conversation::class);
         $this->assertConversationIsAccessible($conversation);
 
-        $parameters = Helper::mapApiParameters($request, LeaveConversationParameters::class);
-        $hideConversation = $parameters->hideConversation;
-
-        (new \wcf\system\conversation\command\LeaveConversation([$conversation->conversationID], $hideConversation))();
+        (new \wcf\system\conversation\command\LeaveConversation([$conversation->conversationID], Conversation::STATE_HIDDEN))();
 
-        return new JsonResponse([
-            'redirectUrl' => LinkHandler::getInstance()->getLink('ConversationList'),
-        ]);
+        return new JsonResponse([]);
     }
 
     private function assertConversationIsAccessible(Conversation $conversation): void
@@ -48,15 +40,3 @@ private function assertConversationIsAccessible(Conversation $conversation): voi
         }
     }
 }
-
-// @codingStandardsIgnoreStart
-/** @internal */
-final class LeaveConversationParameters
-{
-    public function __construct(
-        /** @var Conversation::STATE_DEFAULT|Conversation::STATE_HIDDEN|Conversation::STATE_LEFT */
-        public readonly int $hideConversation,
-    ) {
-    }
-}
-// @codingStandardsIgnoreEnd
diff --git a/files/lib/system/endpoint/controller/core/conversations/LeavePermanentlyConversation.class.php b/files/lib/system/endpoint/controller/core/conversations/LeavePermanentlyConversation.class.php
new file mode 100644
index 00000000..731aa391
--- /dev/null
+++ b/files/lib/system/endpoint/controller/core/conversations/LeavePermanentlyConversation.class.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace wcf\system\endpoint\controller\core\conversations;
+
+use Laminas\Diactoros\Response\JsonResponse;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use wcf\data\conversation\Conversation;
+use wcf\http\Helper;
+use wcf\system\endpoint\IController;
+use wcf\system\endpoint\PostRequest;
+use wcf\system\exception\PermissionDeniedException;
+
+/**
+ * API endpoint for leaving a conversation permanently.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+#[PostRequest('/core/conversations/{id:\d+}/leave-permanently')]
+final class LeavePermanentlyConversation implements IController
+{
+    #[\Override]
+    public function __invoke(ServerRequestInterface $request, array $variables): ResponseInterface
+    {
+        $conversation = Helper::fetchObjectFromRequestParameter($variables['id'], Conversation::class);
+        $this->assertConversationIsAccessible($conversation);
+
+        (new \wcf\system\conversation\command\LeaveConversation([$conversation->conversationID], Conversation::STATE_LEFT))();
+
+        return new JsonResponse([]);
+    }
+
+    private function assertConversationIsAccessible(Conversation $conversation): void
+    {
+        if (!Conversation::isParticipant([$conversation->conversationID])) {
+            throw new PermissionDeniedException();
+        }
+    }
+}
diff --git a/files/lib/system/endpoint/controller/core/conversations/RestoreConversation.class.php b/files/lib/system/endpoint/controller/core/conversations/RestoreConversation.class.php
new file mode 100644
index 00000000..de62d829
--- /dev/null
+++ b/files/lib/system/endpoint/controller/core/conversations/RestoreConversation.class.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace wcf\system\endpoint\controller\core\conversations;
+
+use Laminas\Diactoros\Response\JsonResponse;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use wcf\data\conversation\Conversation;
+use wcf\http\Helper;
+use wcf\system\endpoint\IController;
+use wcf\system\endpoint\PostRequest;
+use wcf\system\exception\PermissionDeniedException;
+
+/**
+ * API endpoint for restore a conversation.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+#[PostRequest('/core/conversations/{id:\d+}/restore')]
+final class RestoreConversation implements IController
+{
+    #[\Override]
+    public function __invoke(ServerRequestInterface $request, array $variables): ResponseInterface
+    {
+        $conversation = Helper::fetchObjectFromRequestParameter($variables['id'], Conversation::class);
+        $this->assertConversationIsAccessible($conversation);
+
+        (new \wcf\system\conversation\command\LeaveConversation([$conversation->conversationID], Conversation::STATE_DEFAULT))();
+
+        return new JsonResponse([]);
+    }
+
+    private function assertConversationIsAccessible(Conversation $conversation): void
+    {
+        if (!Conversation::isParticipant([$conversation->conversationID])) {
+            throw new PermissionDeniedException();
+        }
+    }
+}
diff --git a/files/lib/system/interaction/user/ConversationInteractions.class.php b/files/lib/system/interaction/user/ConversationInteractions.class.php
index 3c1a1ca9..aa1c0669 100644
--- a/files/lib/system/interaction/user/ConversationInteractions.class.php
+++ b/files/lib/system/interaction/user/ConversationInteractions.class.php
@@ -12,6 +12,8 @@
 use wcf\system\interaction\AbstractInteractionProvider;
 use wcf\system\interaction\Divider;
 use wcf\system\interaction\FormBuilderDialogInteraction;
+use wcf\system\interaction\InteractionConfirmationType;
+use wcf\system\interaction\RpcInteraction;
 use wcf\system\request\LinkHandler;
 use wcf\system\WCF;
 
@@ -51,7 +53,27 @@ public function __construct()
                 'wcf.conversation.edit.addParticipants',
                 static fn (ViewableConversation $conversation) => $conversation->canAddParticipants(),
             ),
-            // TODO leave `wcf.conversation.edit.leave`
+            new RpcInteraction(
+                'restore',
+                'core/conversations/%s/restore',
+                'wcf.conversation.hideConversation.restore',
+                isAvailableCallback: static fn (ViewableConversation $conversation) => $conversation->hideConversation
+            ),
+            new RpcInteraction(
+                'leave',
+                'core/conversations/%s/leave',
+                'wcf.conversation.hideConversation.leave',
+                InteractionConfirmationType::Custom,
+                'wcf.conversation.hideConversation.leave.description',
+                static fn (ViewableConversation $conversation) => !$conversation->hideConversation
+            ),
+            new RpcInteraction(
+                'leave-permanently',
+                'core/conversations/%s/leave-permanently',
+                'wcf.conversation.hideConversation.leavePermanently',
+                InteractionConfirmationType::Custom,
+                'wcf.conversation.hideConversation.leavePermanently.description',
+            ),
         ]);
 
         EventHandler::getInstance()->fire(

From 5575393737333d1a8be9bb231d994cd49e88ede0 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Wed, 25 Jun 2025 14:27:35 +0200
Subject: [PATCH 06/24] Add API endpoints to open and close conversations

---
 .../com.woltlab.wcf.conversation.php          |  2 +
 .../conversations/CloseConversation.class.php | 59 +++++++++++++++++++
 .../conversations/OpenConversation.class.php  | 59 +++++++++++++++++++
 .../user/ConversationInteractions.class.php   | 14 ++++-
 4 files changed, 132 insertions(+), 2 deletions(-)
 create mode 100644 files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php
 create mode 100644 files/lib/system/endpoint/controller/core/conversations/OpenConversation.class.php

diff --git a/files/lib/bootstrap/com.woltlab.wcf.conversation.php b/files/lib/bootstrap/com.woltlab.wcf.conversation.php
index 0fe63bba..62edf5df 100644
--- a/files/lib/bootstrap/com.woltlab.wcf.conversation.php
+++ b/files/lib/bootstrap/com.woltlab.wcf.conversation.php
@@ -43,6 +43,8 @@ static function (\wcf\event\endpoint\ControllerCollecting $event) {
             $event->register(new \wcf\system\endpoint\controller\core\conversations\LeaveConversation());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\LeavePermanentlyConversation());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\RestoreConversation());
+            $event->register(new \wcf\system\endpoint\controller\core\conversations\OpenConversation());
+            $event->register(new \wcf\system\endpoint\controller\core\conversations\CloseConversation());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationLeaveDialog());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationLabels());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\AssignConversationLabels());
diff --git a/files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php b/files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php
new file mode 100644
index 00000000..f3fc2f09
--- /dev/null
+++ b/files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php
@@ -0,0 +1,59 @@
+<?php
+
+namespace wcf\system\endpoint\controller\core\conversations;
+
+use Laminas\Diactoros\Response\JsonResponse;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use wcf\data\conversation\Conversation;
+use wcf\data\conversation\ConversationEditor;
+use wcf\http\Helper;
+use wcf\system\endpoint\IController;
+use wcf\system\endpoint\PostRequest;
+use wcf\system\exception\PermissionDeniedException;
+use wcf\system\log\modification\ConversationModificationLogHandler;
+use wcf\system\WCF;
+
+/**
+ * API endpoint for close a conversation for new messages.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+#[PostRequest('/core/conversations/{id:\d+}/close')]
+final class CloseConversation implements IController
+{
+    #[\Override]
+    public function __invoke(ServerRequestInterface $request, array $variables): ResponseInterface
+    {
+        $conversation = Helper::fetchObjectFromRequestParameter($variables['id'], Conversation::class);
+        $this->assertConversationCanClosed($conversation);
+
+        if (!$conversation->isClosed) {
+            $this->openConversation($conversation);
+        }
+
+        return new JsonResponse([]);
+    }
+
+    private function assertConversationCanClosed(Conversation $conversation): void
+    {
+        if (!Conversation::isParticipant([$conversation->conversationID])) {
+            throw new PermissionDeniedException();
+        }
+
+        if ($conversation->userID !== WCF::getUser()->userID) {
+            throw new PermissionDeniedException();
+        }
+    }
+
+    private function openConversation(Conversation $conversation): void
+    {
+        $editor = new ConversationEditor($conversation);
+        $editor->update(['isClosed' => 1]);
+
+        ConversationModificationLogHandler::getInstance()->close($conversation);
+    }
+}
diff --git a/files/lib/system/endpoint/controller/core/conversations/OpenConversation.class.php b/files/lib/system/endpoint/controller/core/conversations/OpenConversation.class.php
new file mode 100644
index 00000000..c1d2c0f6
--- /dev/null
+++ b/files/lib/system/endpoint/controller/core/conversations/OpenConversation.class.php
@@ -0,0 +1,59 @@
+<?php
+
+namespace wcf\system\endpoint\controller\core\conversations;
+
+use Laminas\Diactoros\Response\JsonResponse;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use wcf\data\conversation\Conversation;
+use wcf\data\conversation\ConversationEditor;
+use wcf\http\Helper;
+use wcf\system\endpoint\IController;
+use wcf\system\endpoint\PostRequest;
+use wcf\system\exception\PermissionDeniedException;
+use wcf\system\log\modification\ConversationModificationLogHandler;
+use wcf\system\WCF;
+
+/**
+ * API endpoint for open a conversation for new messages.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+#[PostRequest('/core/conversations/{id:\d+}/open')]
+final class OpenConversation implements IController
+{
+    #[\Override]
+    public function __invoke(ServerRequestInterface $request, array $variables): ResponseInterface
+    {
+        $conversation = Helper::fetchObjectFromRequestParameter($variables['id'], Conversation::class);
+        $this->assertConversationCanOpened($conversation);
+
+        if ($conversation->isClosed) {
+            $this->openConversation($conversation);
+        }
+
+        return new JsonResponse([]);
+    }
+
+    private function assertConversationCanOpened(Conversation $conversation): void
+    {
+        if (!Conversation::isParticipant([$conversation->conversationID])) {
+            throw new PermissionDeniedException();
+        }
+
+        if ($conversation->userID !== WCF::getUser()->userID) {
+            throw new PermissionDeniedException();
+        }
+    }
+
+    private function openConversation(Conversation $conversation): void
+    {
+        $editor = new ConversationEditor($conversation);
+        $editor->update(['isClosed' => 0]);
+
+        ConversationModificationLogHandler::getInstance()->open($conversation);
+    }
+}
diff --git a/files/lib/system/interaction/user/ConversationInteractions.class.php b/files/lib/system/interaction/user/ConversationInteractions.class.php
index aa1c0669..f9c0c5d0 100644
--- a/files/lib/system/interaction/user/ConversationInteractions.class.php
+++ b/files/lib/system/interaction/user/ConversationInteractions.class.php
@@ -38,8 +38,18 @@ public function __construct()
                 'wcf.conversation.edit.subject',
                 static fn (ViewableConversation $conversation) => WCF::getUser()->userID === $conversation->userID,
             ),
-            // TODO close `wcf.conversation.edit.close`
-            // TODO open `wcf.conversation.edit.open`
+            new RpcInteraction(
+                'open',
+                'core/conversations/%s/open',
+                'wcf.conversation.edit.open',
+                isAvailableCallback: static fn (ViewableConversation $conversation) => $conversation->isClosed && $conversation->userID === WCF::getUser()->userID
+            ),
+            new RpcInteraction(
+                'close',
+                'core/conversations/%s/close',
+                'wcf.conversation.edit.close',
+                isAvailableCallback: static fn (ViewableConversation $conversation) => !$conversation->isClosed && $conversation->userID === WCF::getUser()->userID
+            ),
             new FormBuilderDialogInteraction(
                 'assignLabel',
                 LinkHandler::getInstance()->getControllerLink(AssignConversationLabelDialogAction::class, ['id' => '%s']),

From ac46db8b3888a23d12b611dca505243e66b929b9 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Thu, 26 Jun 2025 10:17:28 +0200
Subject: [PATCH 07/24] Add bulk conversation interactions

---
 .../UserConversationList.class.php            | 10 ++---
 .../ConversationBulkInteractions.class.php    | 42 ++++++++++++++++++-
 .../user/ConversationInteractions.class.php   | 32 ++++++++++----
 3 files changed, 70 insertions(+), 14 deletions(-)

diff --git a/files/lib/data/conversation/UserConversationList.class.php b/files/lib/data/conversation/UserConversationList.class.php
index f4e0fc20..eb1cacf4 100644
--- a/files/lib/data/conversation/UserConversationList.class.php
+++ b/files/lib/data/conversation/UserConversationList.class.php
@@ -45,13 +45,13 @@ class UserConversationList extends ConversationList
 
     /**
      * Creates a new UserConversationList
-     *
-     * @param int $userID
-     * @param string $filter
-     * @param int $labelID
      */
-    public function __construct($userID, $filter = '', $labelID = 0)
+    public function __construct(?int $userID = null, string $filter = '', ?int $labelID = null)
     {
+        if (!$userID) {
+            $userID = WCF::getUser()->userID;
+        }
+
         parent::__construct();
 
         $this->filter = $filter;
diff --git a/files/lib/system/interaction/bulk/user/ConversationBulkInteractions.class.php b/files/lib/system/interaction/bulk/user/ConversationBulkInteractions.class.php
index 4eb7c4ac..bbe6f4e1 100644
--- a/files/lib/system/interaction/bulk/user/ConversationBulkInteractions.class.php
+++ b/files/lib/system/interaction/bulk/user/ConversationBulkInteractions.class.php
@@ -3,12 +3,16 @@
 namespace wcf\system\interaction\bulk\user;
 
 use wcf\action\AssignConversationLabelDialogAction;
-use wcf\data\conversation\ConversationList;
 use wcf\data\conversation\label\ConversationLabel;
+use wcf\data\conversation\UserConversationList;
+use wcf\data\conversation\ViewableConversation;
 use wcf\event\interaction\bulk\user\ConversationBulkInteractionCollecting;
 use wcf\system\event\EventHandler;
 use wcf\system\interaction\bulk\AbstractBulkInteractionProvider;
 use wcf\system\interaction\bulk\BulkFormBuilderDialogInteraction;
+use wcf\system\interaction\bulk\BulkRpcInteraction;
+use wcf\system\interaction\InteractionConfirmationType;
+use wcf\system\WCF;
 
 /**
  * Bulk interaction provider for conversations.
@@ -25,12 +29,46 @@ public function __construct()
         $labelList = ConversationLabel::getLabelsByUser();
 
         $this->addInteractions([
+            new BulkRpcInteraction(
+                'open',
+                'core/conversations/%s/open',
+                'wcf.conversation.edit.open',
+                isAvailableCallback: static fn (ViewableConversation $conversation) => $conversation->isClosed && $conversation->userID === WCF::getUser()->userID
+            ),
+            new BulkRpcInteraction(
+                'close',
+                'core/conversations/%s/close',
+                'wcf.conversation.edit.close',
+                isAvailableCallback: static fn (ViewableConversation $conversation) => !$conversation->isClosed && $conversation->userID === WCF::getUser()->userID
+            ),
             new BulkFormBuilderDialogInteraction(
                 'assignLabel',
                 AssignConversationLabelDialogAction::class,
                 'wcf.conversation.edit.assignLabel',
                 static fn () => $labelList->count() > 0,
             ),
+            new BulkRpcInteraction(
+                'restore',
+                'core/conversations/%s/restore',
+                'wcf.conversation.hideConversation.restore',
+                InteractionConfirmationType::Custom,
+                isAvailableCallback: static fn (ViewableConversation $conversation) => (bool)$conversation->hideConversation
+            ),
+            new BulkRpcInteraction(
+                'leave',
+                'core/conversations/%s/leave',
+                'wcf.conversation.hideConversation.leave',
+                InteractionConfirmationType::Custom,
+                'wcf.conversation.hideConversation.leave.description',
+                static fn (ViewableConversation $conversation) => !$conversation->hideConversation
+            ),
+            new BulkRpcInteraction(
+                'leave-permanently',
+                'core/conversations/%s/leave-permanently',
+                'wcf.conversation.hideConversation.leavePermanently',
+                InteractionConfirmationType::Custom,
+                'wcf.conversation.hideConversation.leavePermanently.description',
+            ),
         ]);
 
         EventHandler::getInstance()->fire(
@@ -41,6 +79,6 @@ public function __construct()
     #[\Override]
     public function getObjectListClassName(): string
     {
-        return ConversationList::class;
+        return UserConversationList::class;
     }
 }
diff --git a/files/lib/system/interaction/user/ConversationInteractions.class.php b/files/lib/system/interaction/user/ConversationInteractions.class.php
index f9c0c5d0..9fb93e55 100644
--- a/files/lib/system/interaction/user/ConversationInteractions.class.php
+++ b/files/lib/system/interaction/user/ConversationInteractions.class.php
@@ -5,9 +5,11 @@
 use wcf\action\AddParticipantConversationDialogAction;
 use wcf\action\AssignConversationLabelDialogAction;
 use wcf\action\EditSubjectConversationDialogAction;
+use wcf\data\conversation\Conversation;
 use wcf\data\conversation\label\ConversationLabel;
 use wcf\data\conversation\ViewableConversation;
 use wcf\event\interaction\user\ConversationInteractionCollecting;
+use wcf\system\cache\runtime\UserConversationRuntimeCache;
 use wcf\system\event\EventHandler;
 use wcf\system\interaction\AbstractInteractionProvider;
 use wcf\system\interaction\Divider;
@@ -36,19 +38,19 @@ public function __construct()
                 'editSubject',
                 LinkHandler::getInstance()->getControllerLink(EditSubjectConversationDialogAction::class, ['id' => '%s']),
                 'wcf.conversation.edit.subject',
-                static fn (ViewableConversation $conversation) => WCF::getUser()->userID === $conversation->userID,
+                static fn (ViewableConversation|Conversation $conversation) => WCF::getUser()->userID === $conversation->userID,
             ),
             new RpcInteraction(
                 'open',
                 'core/conversations/%s/open',
                 'wcf.conversation.edit.open',
-                isAvailableCallback: static fn (ViewableConversation $conversation) => $conversation->isClosed && $conversation->userID === WCF::getUser()->userID
+                isAvailableCallback: static fn (ViewableConversation|Conversation $conversation) => $conversation->isClosed && $conversation->userID === WCF::getUser()->userID
             ),
             new RpcInteraction(
                 'close',
                 'core/conversations/%s/close',
                 'wcf.conversation.edit.close',
-                isAvailableCallback: static fn (ViewableConversation $conversation) => !$conversation->isClosed && $conversation->userID === WCF::getUser()->userID
+                isAvailableCallback: static fn (ViewableConversation|Conversation $conversation) => !$conversation->isClosed && $conversation->userID === WCF::getUser()->userID
             ),
             new FormBuilderDialogInteraction(
                 'assignLabel',
@@ -61,13 +63,21 @@ public function __construct()
                 'addParticipants',
                 LinkHandler::getInstance()->getControllerLink(AddParticipantConversationDialogAction::class, ['id' => '%s']),
                 'wcf.conversation.edit.addParticipants',
-                static fn (ViewableConversation $conversation) => $conversation->canAddParticipants(),
+                static fn (ViewableConversation|Conversation $conversation) => $conversation->canAddParticipants(),
             ),
             new RpcInteraction(
                 'restore',
                 'core/conversations/%s/restore',
                 'wcf.conversation.hideConversation.restore',
-                isAvailableCallback: static fn (ViewableConversation $conversation) => $conversation->hideConversation
+                InteractionConfirmationType::Custom,
+                isAvailableCallback: static function (ViewableConversation|Conversation $conversation) {
+                    if (!($conversation instanceof ViewableConversation)) {
+                        $conversation = UserConversationRuntimeCache::getInstance()->getObject($conversation->conversationID);
+                    }
+
+                    return (bool)$conversation->hideConversation;
+                },
+                invalidatesAllItems: true
             ),
             new RpcInteraction(
                 'leave',
@@ -75,7 +85,14 @@ public function __construct()
                 'wcf.conversation.hideConversation.leave',
                 InteractionConfirmationType::Custom,
                 'wcf.conversation.hideConversation.leave.description',
-                static fn (ViewableConversation $conversation) => !$conversation->hideConversation
+                static function (ViewableConversation|Conversation $conversation) {
+                    if (!($conversation instanceof ViewableConversation)) {
+                        $conversation = UserConversationRuntimeCache::getInstance()->getObject($conversation->conversationID);
+                    }
+
+                    return !$conversation->hideConversation;
+                },
+                true
             ),
             new RpcInteraction(
                 'leave-permanently',
@@ -83,6 +100,7 @@ public function __construct()
                 'wcf.conversation.hideConversation.leavePermanently',
                 InteractionConfirmationType::Custom,
                 'wcf.conversation.hideConversation.leavePermanently.description',
+                invalidatesAllItems: true
             ),
         ]);
 
@@ -94,6 +112,6 @@ public function __construct()
     #[\Override]
     public function getObjectClassName(): string
     {
-        return ViewableConversation::class;
+        return Conversation::class;
     }
 }

From fe9adc4b94798004cd43c844ac903d13f2267604 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Thu, 26 Jun 2025 10:37:20 +0200
Subject: [PATCH 08/24] Use standalone interaction context menu in conversation
 page

---
 .../com.woltlab.wcf.conversation.php          |  1 +
 files/lib/form/ConversationAddForm.class.php  |  3 +-
 files/lib/page/ConversationPage.class.php     |  9 ++++
 .../UserConversationRuntimeCache.class.php    |  4 +-
 .../GetConversationHeaderTitle.class.php      | 50 +++++++++++++++++
 .../user/ConversationInteractions.class.php   |  8 +++
 language/de.xml                               |  1 +
 language/en.xml                               |  1 +
 templates/conversation.tpl                    | 54 ++-----------------
 templates/conversationContentHeaderTitle.tpl  | 37 +++++++++++++
 10 files changed, 115 insertions(+), 53 deletions(-)
 create mode 100644 files/lib/system/endpoint/controller/core/conversations/GetConversationHeaderTitle.class.php
 create mode 100644 templates/conversationContentHeaderTitle.tpl

diff --git a/files/lib/bootstrap/com.woltlab.wcf.conversation.php b/files/lib/bootstrap/com.woltlab.wcf.conversation.php
index 62edf5df..5ee70c3d 100644
--- a/files/lib/bootstrap/com.woltlab.wcf.conversation.php
+++ b/files/lib/bootstrap/com.woltlab.wcf.conversation.php
@@ -45,6 +45,7 @@ static function (\wcf\event\endpoint\ControllerCollecting $event) {
             $event->register(new \wcf\system\endpoint\controller\core\conversations\RestoreConversation());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\OpenConversation());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\CloseConversation());
+            $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationHeaderTitle());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationLeaveDialog());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationLabels());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\AssignConversationLabels());
diff --git a/files/lib/form/ConversationAddForm.class.php b/files/lib/form/ConversationAddForm.class.php
index 28e305c1..91f21a79 100644
--- a/files/lib/form/ConversationAddForm.class.php
+++ b/files/lib/form/ConversationAddForm.class.php
@@ -376,6 +376,7 @@ static function (UserFormField $formField) use (
                     $participantGroupsFormField?->getValue() ?: [],
                     $invisibleParticipantGroupsFormField?->getValue() ?: [],
                 );
+
                 $userIDs = \array_merge(
                     \array_column($formField->getUsers(), 'userID'),
                     \array_column($invisibleParticipantsFormField?->getUsers() ?: [], 'userID'),
@@ -391,7 +392,7 @@ static function (UserFormField $formField) use (
                     );
                 }
 
-                if ($userIDs === []) {
+                if (!$isDraftFormField?->getValue() && $userIDs === []) {
                     $formField->addValidationError(new FormFieldValidationError('empty'));
                 }
             }
diff --git a/files/lib/page/ConversationPage.class.php b/files/lib/page/ConversationPage.class.php
index 931be5f3..a3245d52 100644
--- a/files/lib/page/ConversationPage.class.php
+++ b/files/lib/page/ConversationPage.class.php
@@ -17,6 +17,8 @@
 use wcf\system\bbcode\BBCodeHandler;
 use wcf\system\exception\IllegalLinkException;
 use wcf\system\exception\PermissionDeniedException;
+use wcf\system\interaction\StandaloneInteractionContextMenuComponent;
+use wcf\system\interaction\user\ConversationInteractions;
 use wcf\system\message\quote\MessageQuoteManager;
 use wcf\system\page\PageLocationManager;
 use wcf\system\page\ParentPageLocation;
@@ -355,6 +357,13 @@ public function assignVariables()
             'conversationID' => $this->conversationID,
             'participants' => $this->participantList->getObjects(),
             'defaultSmilies' => SmileyCache::getInstance()->getCategorySmilies(),
+            'interactionContextMenu' => StandaloneInteractionContextMenuComponent::forContentInteractionButton(
+                new ConversationInteractions(),
+                $this->conversation,
+                LinkHandler::getInstance()->getControllerLink(ConversationListPage::class),
+                WCF::getLanguage()->getDynamicVariable('wcf.conversation.edit.conversation'),
+                "core/conversations/{$this->conversationID}/content-header-title"
+            ),
         ]);
 
         BBCodeHandler::getInstance()->setDisallowedBBCodes(\explode(
diff --git a/files/lib/system/cache/runtime/UserConversationRuntimeCache.class.php b/files/lib/system/cache/runtime/UserConversationRuntimeCache.class.php
index 34e6ed2c..a99619aa 100644
--- a/files/lib/system/cache/runtime/UserConversationRuntimeCache.class.php
+++ b/files/lib/system/cache/runtime/UserConversationRuntimeCache.class.php
@@ -2,8 +2,8 @@
 
 namespace wcf\system\cache\runtime;
 
-use wcf\data\conversation\Conversation;
 use wcf\data\conversation\UserConversationList;
+use wcf\data\conversation\ViewableConversation;
 use wcf\system\WCF;
 
 /**
@@ -14,7 +14,7 @@
  * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  * @since   3.0
  *
- * @extends AbstractRuntimeCache<Conversation, UserConversationList>
+ * @extends AbstractRuntimeCache<ViewableConversation, UserConversationList>
  */
 class UserConversationRuntimeCache extends AbstractRuntimeCache
 {
diff --git a/files/lib/system/endpoint/controller/core/conversations/GetConversationHeaderTitle.class.php b/files/lib/system/endpoint/controller/core/conversations/GetConversationHeaderTitle.class.php
new file mode 100644
index 00000000..7bad60bd
--- /dev/null
+++ b/files/lib/system/endpoint/controller/core/conversations/GetConversationHeaderTitle.class.php
@@ -0,0 +1,50 @@
+<?php
+
+namespace wcf\system\endpoint\controller\core\conversations;
+
+use Laminas\Diactoros\Response\JsonResponse;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use wcf\data\conversation\ViewableConversation;
+use wcf\system\cache\runtime\UserConversationRuntimeCache;
+use wcf\system\endpoint\GetRequest;
+use wcf\system\endpoint\IController;
+use wcf\system\exception\IllegalLinkException;
+use wcf\system\exception\PermissionDeniedException;
+use wcf\system\WCF;
+
+/**
+ * API endpoint for the rendering of the conversation content header title.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+#[GetRequest('/core/conversations/{id:\d+}/content-header-title')]
+final class GetConversationHeaderTitle implements IController
+{
+    #[\Override]
+    public function __invoke(ServerRequestInterface $request, array $variables): ResponseInterface
+    {
+        $conversation = UserConversationRuntimeCache::getInstance()->getObject(\intval($variables['id']));
+        if ($conversation === null) {
+            throw new IllegalLinkException();
+        }
+
+        $this->assertConversationIsAccessible($conversation);
+
+        return new JsonResponse([
+            'template' => WCF::getTPL()->render('wcf', 'conversationContentHeaderTitle', [
+                'conversation' => $conversation,
+            ]),
+        ]);
+    }
+
+    private function assertConversationIsAccessible(ViewableConversation $conversation): void
+    {
+        if (!$conversation->isActiveParticipant()) {
+            throw new PermissionDeniedException();
+        }
+    }
+}
diff --git a/files/lib/system/interaction/user/ConversationInteractions.class.php b/files/lib/system/interaction/user/ConversationInteractions.class.php
index 9fb93e55..d9ea7e51 100644
--- a/files/lib/system/interaction/user/ConversationInteractions.class.php
+++ b/files/lib/system/interaction/user/ConversationInteractions.class.php
@@ -9,10 +9,12 @@
 use wcf\data\conversation\label\ConversationLabel;
 use wcf\data\conversation\ViewableConversation;
 use wcf\event\interaction\user\ConversationInteractionCollecting;
+use wcf\form\ConversationDraftEditForm;
 use wcf\system\cache\runtime\UserConversationRuntimeCache;
 use wcf\system\event\EventHandler;
 use wcf\system\interaction\AbstractInteractionProvider;
 use wcf\system\interaction\Divider;
+use wcf\system\interaction\EditInteraction;
 use wcf\system\interaction\FormBuilderDialogInteraction;
 use wcf\system\interaction\InteractionConfirmationType;
 use wcf\system\interaction\RpcInteraction;
@@ -102,6 +104,12 @@ static function (ViewableConversation|Conversation $conversation) {
                 'wcf.conversation.hideConversation.leavePermanently.description',
                 invalidatesAllItems: true
             ),
+            new EditInteraction(
+                ConversationDraftEditForm::class,
+                static function (ViewableConversation|Conversation $conversation) {
+                    return $conversation->isDraft;
+                }
+            ),
         ]);
 
         EventHandler::getInstance()->fire(
diff --git a/language/de.xml b/language/de.xml
index bf0a1622..797e4e9f 100644
--- a/language/de.xml
+++ b/language/de.xml
@@ -159,6 +159,7 @@
 		<item name="wcf.conversation.edit.leave"><![CDATA[Teilnahme verwalten]]></item>
 		<item name="wcf.conversation.edit.open"><![CDATA[Öffnen]]></item>
 		<item name="wcf.conversation.edit.subject"><![CDATA[Betreff bearbeiten]]></item>
+		<item name="wcf.conversation.edit.conversation"><![CDATA[Konversation bearbeiten]]></item>
 	</category>
 	<category name="wcf.conversation.label">
 		<item name="wcf.conversation.label"><![CDATA[Filter nach Label]]></item>
diff --git a/language/en.xml b/language/en.xml
index da8be996..24c6e6d0 100644
--- a/language/en.xml
+++ b/language/en.xml
@@ -159,6 +159,7 @@
 		<item name="wcf.conversation.edit.leave"><![CDATA[Manage Participation]]></item>
 		<item name="wcf.conversation.edit.open"><![CDATA[Open]]></item>
 		<item name="wcf.conversation.edit.subject"><![CDATA[Edit Subject]]></item>
+		<item name="wcf.conversation.edit.conversation"><![CDATA[Edit Conversation]]></item>
 	</category>
 	<category name="wcf.conversation.label">
 		<item name="wcf.conversation.label"><![CDATA[Filter by Label]]></item>
diff --git a/templates/conversation.tpl b/templates/conversation.tpl
index e1161fde..a0159136 100644
--- a/templates/conversation.tpl
+++ b/templates/conversation.tpl
@@ -5,44 +5,8 @@
 		<div class="contentHeaderIcon">
 			{@$conversation->getUserProfile()->getAvatar()->getImageTag(64)}
 		</div>
-		
-		<div class="contentHeaderTitle">
-			<h1 class="contentTitle jsConversationSubject" data-conversation-id="{$conversation->conversationID}">{$conversation->subject}</h1>
-			
-			<ul class="inlineList contentHeaderMetaData">
-				{hascontent}
-					<li>
-						{icon name='tags'}
-						<ul class="labelList">
-							{content}
-								{foreach from=$conversation->getAssignedLabels() item=label}
-									<li><span class="label badge{if $label->cssClassName} {$label->cssClassName}{/if}">{$label->label}</span></li>
-								{/foreach}
-							{/content}
-						</ul>
-					</li>
-				{/hascontent}
-				
-				<li>
-					{icon name='user'}
-					{user object=$conversation->getUserProfile()}
-				</li>
-				
-				<li>
-					{icon name='clock'}
-					<a href="{$conversation->getLink()}">{time time=$conversation->time}</a>
-				</li>
-				
-				{if $conversation->isClosed}
-					<li>
-						<span class="jsIconLock">
-							{icon name='lock'}
-						</span>
-						{lang}wcf.global.state.closed{/lang}
-					</li>
-				{/if}
-			</ul>
-		</div>
+
+		{include file='conversationContentHeaderTitle'}
 		
 		{hascontent}
 			<nav class="contentHeaderNavigation">
@@ -69,18 +33,8 @@
 {/capture}
 
 {capture assign='contentInteractionButtons'}
-	<div class="conversation jsConversationInlineEditorContainer contentInteractionButton" data-conversation-id="{$conversation->conversationID}" data-label-ids="[ {implode from=$conversation->getAssignedLabels() item=label}{$label->labelID}{/implode} ]" data-is-closed="{$conversation->isClosed}" data-can-close-conversation="{if $conversation->userID == $__wcf->getUser()->userID}1{else}0{/if}" data-can-add-participants="{if $conversation->canAddParticipants()}1{else}0{/if}" data-is-draft="{if $conversation->isDraft}1{else}0{/if}">
-		{if $conversation->isDraft}
-			<a href="{link controller='ConversationDraftEdit' id=$conversation->conversationID}{/link}" class="button small jsConversationInlineEditor">
-				{icon name='pencil'}
-				<span>{lang}wcf.global.button.edit{/lang}</span>
-			</a>
-		{else}
-			<button type="button" class="button small jsConversationInlineEditor">
-				{icon name='pencil'}
-				<span>{lang}wcf.global.button.edit{/lang}</span>
-			</button>
-		{/if}
+	<div class="conversation contentInteractionButton">
+		{unsafe:$interactionContextMenu->render()}
 	</div>
 {/capture}
 
diff --git a/templates/conversationContentHeaderTitle.tpl b/templates/conversationContentHeaderTitle.tpl
new file mode 100644
index 00000000..fe183db8
--- /dev/null
+++ b/templates/conversationContentHeaderTitle.tpl
@@ -0,0 +1,37 @@
+<div class="contentHeaderTitle">
+	<h1 class="contentTitle jsConversationSubject" data-conversation-id="{$conversation->conversationID}">{$conversation->subject}</h1>
+
+	<ul class="inlineList contentHeaderMetaData">
+		{hascontent}
+			<li>
+				{icon name='tags'}
+				<ul class="labelList">
+					{content}
+						{foreach from=$conversation->getAssignedLabels() item=label}
+							<li><span class="label badge{if $label->cssClassName} {$label->cssClassName}{/if}">{$label->label}</span></li>
+						{/foreach}
+					{/content}
+				</ul>
+			</li>
+		{/hascontent}
+
+		<li>
+			{icon name='user'}
+			{user object=$conversation->getUserProfile()}
+		</li>
+
+		<li>
+			{icon name='clock'}
+			<a href="{$conversation->getLink()}">{time time=$conversation->time}</a>
+		</li>
+
+		{if $conversation->isClosed}
+			<li>
+				<span class="jsIconLock">
+					{icon name='lock'}
+				</span>
+				{lang}wcf.global.state.closed{/lang}
+			</li>
+		{/if}
+	</ul>
+</div>

From 47c795e49b6673bba560a4b72fce9b06f6c6885f Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Thu, 26 Jun 2025 11:51:40 +0200
Subject: [PATCH 09/24] Remove unused functions

---
 .../conversation/ConversationAction.class.php | 473 ------------------
 1 file changed, 473 deletions(-)

diff --git a/files/lib/data/conversation/ConversationAction.class.php b/files/lib/data/conversation/ConversationAction.class.php
index 3d6c69a1..b20e61f3 100644
--- a/files/lib/data/conversation/ConversationAction.class.php
+++ b/files/lib/data/conversation/ConversationAction.class.php
@@ -7,19 +7,15 @@
 use wcf\data\conversation\message\ConversationMessageList;
 use wcf\data\IClipboardAction;
 use wcf\data\IVisitableObjectAction;
-use wcf\data\user\group\UserGroup;
 use wcf\page\ConversationPage;
 use wcf\system\clipboard\ClipboardHandler;
-use wcf\system\conversation\command\LeaveConversation;
 use wcf\system\conversation\ConversationHandler;
 use wcf\system\database\util\PreparedStatementConditionBuilder;
-use wcf\system\event\EventHandler;
 use wcf\system\exception\IllegalLinkException;
 use wcf\system\exception\PermissionDeniedException;
 use wcf\system\exception\UserInputException;
 use wcf\system\log\modification\ConversationModificationLogHandler;
 use wcf\system\request\LinkHandler;
-use wcf\system\search\SearchIndexManager;
 use wcf\system\style\FontAwesomeIcon;
 use wcf\system\user\notification\object\ConversationUserNotificationObject;
 use wcf\system\user\notification\UserNotificationHandler;
@@ -51,12 +47,6 @@ class ConversationAction extends AbstractDatabaseObjectAction implements
      */
     public $conversation;
 
-    /**
-     * list of conversation data modifications
-     * @var mixed[][]
-     */
-    protected $conversationData = [];
-
     /**
      * @inheritDoc
      */
@@ -457,141 +447,6 @@ public function validateMarkAllAsRead()
         // does nothing
     }
 
-    /**
-     * Validates parameters to close conversations.
-     *
-     * @return void
-     * @throws PermissionDeniedException
-     * @throws UserInputException
-     */
-    public function validateClose()
-    {
-        // read objects
-        if (empty($this->objects)) {
-            $this->readObjects();
-
-            if (empty($this->objects)) {
-                throw new UserInputException('objectIDs');
-            }
-        }
-
-        // validate ownership
-        foreach ($this->getObjects() as $conversation) {
-            if ($conversation->isClosed || ($conversation->userID != WCF::getUser()->userID)) {
-                throw new PermissionDeniedException();
-            }
-        }
-    }
-
-    /**
-     * Closes conversations.
-     *
-     * @return  mixed[][]
-     */
-    public function close()
-    {
-        foreach ($this->getObjects() as $conversation) {
-            $conversation->update(['isClosed' => 1]);
-            $this->addConversationData($conversation->getDecoratedObject(), 'isClosed', 1);
-
-            ConversationModificationLogHandler::getInstance()->close($conversation->getDecoratedObject());
-        }
-
-        $this->unmarkItems();
-
-        return $this->getConversationData();
-    }
-
-    /**
-     * Validates parameters to open conversations.
-     *
-     * @return void
-     * @throws PermissionDeniedException
-     * @throws UserInputException
-     */
-    public function validateOpen()
-    {
-        // read objects
-        if (empty($this->objects)) {
-            $this->readObjects();
-
-            if (empty($this->objects)) {
-                throw new UserInputException('objectIDs');
-            }
-        }
-
-        // validate ownership
-        foreach ($this->getObjects() as $conversation) {
-            if (!$conversation->isClosed || ($conversation->userID != WCF::getUser()->userID)) {
-                throw new PermissionDeniedException();
-            }
-        }
-    }
-
-    /**
-     * Opens conversations.
-     *
-     * @return  mixed[][]
-     */
-    public function open()
-    {
-        foreach ($this->getObjects() as $conversation) {
-            $conversation->update(['isClosed' => 0]);
-            $this->addConversationData($conversation->getDecoratedObject(), 'isClosed', 0);
-
-            ConversationModificationLogHandler::getInstance()->open($conversation->getDecoratedObject());
-        }
-
-        $this->unmarkItems();
-
-        return $this->getConversationData();
-    }
-
-    /**
-     * Validates parameters to hide conversations.
-     *
-     * @return void
-     * @throws PermissionDeniedException
-     * @throws UserInputException
-     */
-    public function validateHideConversation()
-    {
-        $this->parameters['hideConversation'] = isset($this->parameters['hideConversation']) ? \intval($this->parameters['hideConversation']) : null;
-        if (
-            $this->parameters['hideConversation'] === null
-            || !\in_array(
-                $this->parameters['hideConversation'],
-                [Conversation::STATE_DEFAULT, Conversation::STATE_HIDDEN, Conversation::STATE_LEFT]
-            )
-        ) {
-            throw new UserInputException('hideConversation');
-        }
-
-        if (empty($this->objectIDs)) {
-            throw new UserInputException('objectIDs');
-        }
-
-        // validate participation
-        if (!Conversation::isParticipant($this->objectIDs)) {
-            throw new PermissionDeniedException();
-        }
-    }
-
-    /**
-     * Hides or restores conversations.
-     *
-     * @return array{actionName: string, redirectURL: string}
-     */
-    public function hideConversation()
-    {
-        (new LeaveConversation($this->objectIDs, $this->parameters['hideConversation']))();
-
-        return [
-            'actionName' => 'hideConversation',
-            'redirectURL' => LinkHandler::getInstance()->getLink('ConversationList'),
-        ];
-    }
-
     /**
      * @since 5.5
      */
@@ -740,262 +595,6 @@ public function unmarkAll()
         );
     }
 
-    /**
-     * Validates parameters to display the 'add participants' form.
-     *
-     * @return void
-     * @throws PermissionDeniedException
-     */
-    public function validateGetAddParticipantsForm()
-    {
-        $this->conversation = $this->getSingleObject();
-        if (
-            !Conversation::isParticipant([$this->conversation->conversationID])
-            || !$this->conversation->canAddParticipants()
-        ) {
-            throw new PermissionDeniedException();
-        }
-    }
-
-    /**
-     * Shows the 'add participants' form.
-     *
-     * @return array{
-     *  excludedSearchValues: string[],
-     *  maxItems: int,
-     *  canAddGroupParticipants: int,
-     *  template: string,
-     *  restrictUserGroupIDs: list<int>,
-     * }
-     */
-    public function getAddParticipantsForm()
-    {
-        $restrictUserGroupIDs = [];
-        foreach (UserGroup::getAllGroups() as $group) {
-            // @phpstan-ignore property.notFound
-            if ($group->canBeAddedAsConversationParticipant) {
-                $restrictUserGroupIDs[] = $group->groupID;
-            }
-        }
-
-        return [
-            'excludedSearchValues' => $this->conversation->getParticipantNames(
-                false,
-                true,
-                $this->conversation->userID == WCF::getUser()->userID
-            ),
-            'maxItems' => WCF::getSession()->getPermission('user.conversation.maxParticipants') - $this->conversation->participants,
-            'canAddGroupParticipants' => WCF::getSession()->getPermission('user.conversation.canAddGroupParticipants'),
-            'template' => WCF::getTPL()->render(
-                'wcf',
-                'conversationAddParticipants',
-                ['conversation' => $this->conversation]
-            ),
-            'restrictUserGroupIDs' => $restrictUserGroupIDs,
-        ];
-    }
-
-    /**
-     * Validates parameters to add new participants.
-     *
-     * @return void
-     */
-    public function validateAddParticipants()
-    {
-        $this->validateGetAddParticipantsForm();
-
-        // validate participants
-        $this->readStringArray('participants', true);
-        $this->readIntegerArray('participantsGroupIDs', true);
-
-        if (!$this->conversation->getDecoratedObject()->isDraft) {
-            $this->readString('visibility');
-            if (!\in_array($this->parameters['visibility'], ['all', 'new'])) {
-                throw new UserInputException('visibility');
-            }
-
-            if ($this->parameters['visibility'] === 'all' && !$this->conversation->canAddParticipantsUnrestricted()) {
-                throw new UserInputException('visibility');
-            }
-        }
-    }
-
-    /**
-     * Adds new participants.
-     *
-     * @return array{
-     *  count: int,
-     *  successMessage: string,
-     * }|array{
-     *  actionName: 'addParticipants',
-     *  errorMessage: string,
-     * }
-     */
-    public function addParticipants()
-    {
-        // TODO migrate to FormBuilder
-        try {
-            $existingParticipants = $this->conversation->getParticipantIDs(true);
-            $participantIDs = Conversation::validateParticipants(
-                $this->parameters['participants'],
-                'participants',
-                $existingParticipants
-            );
-            if (
-                !empty($this->parameters['participantsGroupIDs'])
-                && WCF::getSession()->getPermission('user.conversation.canAddGroupParticipants')
-            ) {
-                $validGroupParticipants = Conversation::validateGroupParticipants(
-                    $this->parameters['participantsGroupIDs'],
-                    'participants',
-                    $existingParticipants
-                );
-                $validGroupParticipants = \array_diff($validGroupParticipants, $participantIDs);
-                if (empty($validGroupParticipants)) {
-                    throw new UserInputException('participants', 'emptyGroup');
-                }
-                $participantIDs = \array_merge($participantIDs, $validGroupParticipants);
-            }
-
-            $parameters = [
-                'participantIDs' => $participantIDs,
-            ];
-            EventHandler::getInstance()->fireAction($this, 'addParticipants_validateParticipants', $parameters);
-            $participantIDs = $parameters['participantIDs'];
-        } catch (UserInputException $e) {
-            $errorMessage = '';
-            $errors = \is_array($e->getType()) ? $e->getType() : [['type' => $e->getType()]];
-            foreach ($errors as $type) {
-                if (!empty($errorMessage)) {
-                    $errorMessage .= ' ';
-                }
-                $errorMessage .= WCF::getLanguage()->getDynamicVariable(
-                    'wcf.conversation.participants.error.' . $type['type'],
-                    ['username' => $type['username']]
-                );
-            }
-
-            return [
-                'actionName' => 'addParticipants',
-                'errorMessage' => $errorMessage,
-            ];
-        }
-
-        // validate limit
-        $newCount = $this->conversation->participants + \count($participantIDs);
-        if ($newCount > WCF::getSession()->getPermission('user.conversation.maxParticipants')) {
-            return [
-                'actionName' => 'addParticipants',
-                'errorMessage' => WCF::getLanguage()->getDynamicVariable('wcf.conversation.participants.error.tooManyParticipants'),
-            ];
-        }
-
-        $count = 0;
-        $successMessage = '';
-        if (!empty($participantIDs)) {
-            // check for already added participants
-            if ($this->conversation->isDraft) {
-                $draftData = \unserialize($this->conversation->draftData);
-                $draftData['participants'] = \array_merge($draftData['participants'], $participantIDs);
-                $data = ['data' => ['draftData' => \serialize($draftData)]];
-            } else {
-                $data = [
-                    'participants' => $participantIDs,
-                    'visibility' => (isset($this->parameters['visibility'])) ? $this->parameters['visibility'] : 'all',
-                ];
-            }
-
-            $conversationAction = new self([$this->conversation], 'update', $data);
-            $conversationAction->executeAction();
-
-            $count = \count($participantIDs);
-            $successMessage = WCF::getLanguage()->getDynamicVariable(
-                'wcf.conversation.edit.addParticipants.success',
-                ['count' => $count]
-            );
-
-            ConversationModificationLogHandler::getInstance()
-                ->addParticipants($this->conversation->getDecoratedObject(), $participantIDs);
-
-            if (!$this->conversation->isDraft) {
-                // update participant summary
-                $this->conversation->updateParticipantSummary();
-            }
-        }
-
-        return [
-            'count' => $count,
-            'successMessage' => $successMessage,
-        ];
-    }
-
-    /**
-     * Validates parameters to remove a participant from a conversation.
-     *
-     * @return void
-     * @throws PermissionDeniedException
-     * @throws UserInputException
-     */
-    public function validateRemoveParticipant()
-    {
-        // The previous request from `WCF.Action.Delete` used `userID`, while the new `Ui/Object/Action`
-        // module passes `userId`.
-        try {
-            $this->readInteger('userID');
-        } catch (UserInputException $e) {
-            $this->readInteger('userId');
-            $this->parameters['userID'] = $this->parameters['userId'];
-        }
-
-        // validate conversation
-        $this->conversation = $this->getSingleObject();
-        if (!$this->conversation->conversationID) {
-            throw new UserInputException('objectIDs');
-        }
-
-        // check ownership
-        if ($this->conversation->userID != WCF::getUser()->userID) {
-            throw new PermissionDeniedException();
-        }
-
-        // validate participants
-        if (
-            $this->parameters['userID'] == WCF::getUser()->userID
-            || !Conversation::isParticipant([$this->conversation->conversationID])
-            || !Conversation::isParticipant([$this->conversation->conversationID], $this->parameters['userID'])
-        ) {
-            throw new PermissionDeniedException();
-        }
-    }
-
-    /**
-     * Removes a participant from a conversation.
-     *
-     * @return array{userID: int}
-     */
-    public function removeParticipant()
-    {
-        $this->conversation->removeParticipant($this->parameters['userID']);
-        $this->conversation->updateParticipantSummary();
-
-        $userConversation = Conversation::getUserConversation(
-            $this->conversation->conversationID,
-            $this->parameters['userID']
-        );
-
-        if (!$userConversation->isInvisible) {
-            ConversationModificationLogHandler::getInstance()
-                ->removeParticipant($this->conversation->getDecoratedObject(), $this->parameters['userID']);
-        }
-
-        // reset storage
-        UserStorageHandler::getInstance()->reset([$this->parameters['userID']], 'unreadConversationCount');
-
-        return [
-            'userID' => $this->parameters['userID'],
-        ];
-    }
-
     /**
      * Rebuilds the conversation data of the relevant conversations.
      *
@@ -1043,78 +642,6 @@ public function rebuild()
         }
     }
 
-    /**
-     * Validates the parameters to edit a conversation's subject.
-     *
-     * @return void
-     * @throws PermissionDeniedException
-     */
-    public function validateEditSubject()
-    {
-        $this->readString('subject');
-
-        $this->conversation = $this->getSingleObject();
-        if ($this->conversation->userID != WCF::getUser()->userID) {
-            throw new PermissionDeniedException();
-        }
-    }
-
-    /**
-     * Edits a conversation's subject.
-     *
-     * @return array{subject: string}
-     */
-    public function editSubject()
-    {
-        $subject = \mb_substr($this->parameters['subject'], 0, 255);
-
-        $this->conversation->update([
-            'subject' => $subject,
-        ]);
-
-        $message = $this->conversation->getFirstMessage();
-
-        SearchIndexManager::getInstance()->set(
-            'com.woltlab.wcf.conversation.message',
-            $message->messageID,
-            $message->message,
-            $subject,
-            $message->time,
-            $message->userID,
-            $message->username
-        );
-
-        return [
-            'subject' => $subject,
-        ];
-    }
-
-    /**
-     * Adds conversation modification data.
-     *
-     * @return void
-     */
-    protected function addConversationData(Conversation $conversation, string $key, mixed $value)
-    {
-        if (!isset($this->conversationData[$conversation->conversationID])) {
-            $this->conversationData[$conversation->conversationID] = [];
-        }
-
-        $this->conversationData[$conversation->conversationID][$key] = $value;
-    }
-
-    /**
-     * Returns conversation data.
-     *
-     * @return mixed[][]
-     */
-    protected function getConversationData()
-    {
-        return [
-            'conversationData' => $this->conversationData,
-        ];
-    }
-
     /**
      * Unmarks conversations.
      *

From 102f71e66cbd1b0847e764b534d36f128dd38ddd Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Thu, 26 Jun 2025 11:54:14 +0200
Subject: [PATCH 10/24] Remove conversation clipboard

---
 clipboardAction.xml                           |   4 +-
 fileDelete.xml                                |   1 +
 .../conversation/ConversationAction.class.php |  50 +--
 .../ConversationClipboardAction.class.php     | 307 ------------------
 objectType.xml                                |   8 +-
 5 files changed, 7 insertions(+), 363 deletions(-)
 delete mode 100644 files/lib/system/clipboard/action/ConversationClipboardAction.class.php

diff --git a/clipboardAction.xml b/clipboardAction.xml
index 17e53aec..87d7192f 100644
--- a/clipboardAction.xml
+++ b/clipboardAction.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <data xmlns="http://www.woltlab.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.woltlab.com http://www.woltlab.com/XSD/6.0/clipboardAction.xsd">
-	<import>
+	<delete>
 		<!-- conversation -->
 		<action name="assignLabel">
 			<actionclassname>wcf\system\clipboard\action\ConversationClipboardAction</actionclassname>
@@ -51,5 +51,5 @@
 				<page>wcf\page\ConversationListPage</page>
 			</pages>
 		</action>
-	</import>
+	</delete>
 </data>
diff --git a/fileDelete.xml b/fileDelete.xml
index 7255da18..a2816d07 100644
--- a/fileDelete.xml
+++ b/fileDelete.xml
@@ -22,5 +22,6 @@
 		<file>lib/system/event/listener/UserGroupAddCanBeAddedAsParticipantListener.class.php</file>
 		<file>lib/system/user/online/location/ConversationLocation.class.php</file>
 		<file>style/conversation.less</file>
+		<file>lib/system/clipboard/action/ConversationClipboardAction.class.php</file>
 	</delete>
 </data>
diff --git a/files/lib/data/conversation/ConversationAction.class.php b/files/lib/data/conversation/ConversationAction.class.php
index b20e61f3..33b3b086 100644
--- a/files/lib/data/conversation/ConversationAction.class.php
+++ b/files/lib/data/conversation/ConversationAction.class.php
@@ -5,10 +5,8 @@
 use wcf\data\AbstractDatabaseObjectAction;
 use wcf\data\conversation\message\ConversationMessageAction;
 use wcf\data\conversation\message\ConversationMessageList;
-use wcf\data\IClipboardAction;
 use wcf\data\IVisitableObjectAction;
 use wcf\page\ConversationPage;
-use wcf\system\clipboard\ClipboardHandler;
 use wcf\system\conversation\ConversationHandler;
 use wcf\system\database\util\PreparedStatementConditionBuilder;
 use wcf\system\exception\IllegalLinkException;
@@ -32,9 +30,7 @@
  *
  * @extends AbstractDatabaseObjectAction<Conversation, ConversationEditor>
  */
-class ConversationAction extends AbstractDatabaseObjectAction implements
-    IClipboardAction,
-    IVisitableObjectAction
+class ConversationAction extends AbstractDatabaseObjectAction implements IVisitableObjectAction
 {
     /**
      * @inheritDoc
@@ -349,10 +345,6 @@ public function markAsRead()
             );
         }
 
-        if (!empty($conversationIDs)) {
-            $this->unmarkItems($conversationIDs);
-        }
-
         $returnValues = [
             'totalCount' => ConversationHandler::getInstance()
                 ->getUnreadConversationCount($this->parameters['userID'], true),
@@ -573,28 +565,6 @@ public function getConversations(): array
         ];
     }
 
-    /**
-     * Validates the 'unmarkAll' action.
-     *
-     * @return void
-     */
-    public function validateUnmarkAll()
-    {
-        // does nothing
-    }
-
-    /**
-     * Unmarks all conversations.
-     *
-     * @return void
-     */
-    public function unmarkAll()
-    {
-        ClipboardHandler::getInstance()->removeItems(
-            ClipboardHandler::getInstance()->getObjectTypeID('com.woltlab.wcf.conversation.conversation')
-        );
-    }
-
     /**
      * Rebuilds the conversation data of the relevant conversations.
      *
@@ -641,22 +611,4 @@ public function rebuild()
             $conversationAction->executeAction();
         }
     }
-
-    /**
-     * Unmarks conversations.
-     *
-     * @param int[] $conversationIDs
-     * @return void
-     */
-    protected function unmarkItems(array $conversationIDs = [])
-    {
-        if (empty($conversationIDs)) {
-            $conversationIDs = $this->objectIDs;
-        }
-
-        ClipboardHandler::getInstance()->unmark(
-            $conversationIDs,
-            ClipboardHandler::getInstance()->getObjectTypeID('com.woltlab.wcf.conversation.conversation')
-        );
-    }
 }
diff --git a/files/lib/system/clipboard/action/ConversationClipboardAction.class.php b/files/lib/system/clipboard/action/ConversationClipboardAction.class.php
deleted file mode 100644
index d5add99b..00000000
--- a/files/lib/system/clipboard/action/ConversationClipboardAction.class.php
+++ /dev/null
@@ -1,307 +0,0 @@
-<?php
-
-namespace wcf\system\clipboard\action;
-
-use wcf\data\clipboard\action\ClipboardAction;
-use wcf\data\conversation\Conversation;
-use wcf\data\conversation\ConversationAction;
-use wcf\system\database\util\PreparedStatementConditionBuilder;
-use wcf\system\WCF;
-
-/**
- * Prepares clipboard editor items for conversations.
- *
- * @author  Alexander Ebert
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- *
- * @extends AbstractClipboardAction<Conversation>
- */
-class ConversationClipboardAction extends AbstractClipboardAction
-{
-    /**
-     * @inheritDoc
-     */
-    protected $actionClassActions = ['close', 'markAsRead', 'open'];
-
-    /**
-     * list of conversations
-     * @var Conversation[]
-     */
-    public $conversations;
-
-    /**
-     * @inheritDoc
-     */
-    protected $supportedActions = [
-        'assignLabel',
-        'close',
-        'leave',
-        'leavePermanently',
-        'markAsRead',
-        'open',
-        'restore',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    public function execute(array $objects, ClipboardAction $action)
-    {
-        if ($this->conversations === null) {
-            // validate conversations
-            $this->validateParticipation($objects);
-        }
-
-        // check if no conversation was accessible
-        if (empty($this->conversations)) {
-            return null;
-        }
-
-        $item = parent::execute($objects, $action);
-
-        if ($item === null) {
-            return null;
-        }
-
-        switch ($action->actionName) {
-            case 'assignLabel':
-                // check if user has labels
-                $sql = "SELECT  COUNT(*) AS count
-                        FROM    wcf1_conversation_label
-                        WHERE   userID = ?";
-                $statement = WCF::getDB()->prepare($sql);
-                $statement->execute([WCF::getUser()->userID]);
-                $row = $statement->fetchArray();
-                if ($row['count'] == 0) {
-                    return null;
-                }
-
-                $item->addParameter('objectIDs', \array_keys($this->conversations));
-                break;
-
-            case 'leave':
-                $item->addInternalData('parameters', ['hideConversation' => 1]);
-                $item->addParameter('actionName', 'hideConversation');
-                $item->addParameter('className', $this->getClassName());
-                break;
-
-            case 'leavePermanently':
-                $item->addParameter('objectIDs', \array_keys($this->conversations));
-                $item->addInternalData('parameters', ['hideConversation' => 2]);
-                $item->addParameter('actionName', 'hideConversation');
-                $item->addParameter('className', $this->getClassName());
-                break;
-
-            case 'markAsRead':
-                $item->addParameter('objectIDs', \array_keys($this->conversations));
-                $item->addParameter('actionName', 'markAsRead');
-                $item->addParameter('className', $this->getClassName());
-                $item->addInternalData(
-                    'confirmMessage',
-                    WCF::getLanguage()->getDynamicVariable(
-                        'wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.markAsRead.confirmMessage',
-                        [
-                            'count' => $item->getCount(),
-                        ]
-                    )
-                );
-                break;
-
-            case 'restore':
-                $item->addInternalData('parameters', ['hideConversation' => 0]);
-                $item->addParameter('actionName', 'hideConversation');
-                $item->addParameter('className', $this->getClassName());
-                break;
-        }
-
-        return $item;
-    }
-
-    /**
-     * @inheritDoc
-     */
-    public function getClassName()
-    {
-        return ConversationAction::class;
-    }
-
-    /**
-     * @inheritDoc
-     */
-    public function getTypeName()
-    {
-        return 'com.woltlab.wcf.conversation.conversation';
-    }
-
-    /**
-     * Returns a list of conversations with user participation.
-     *
-     * @param Conversation[] $conversations
-     * @return void
-     */
-    protected function validateParticipation(array $conversations)
-    {
-        $conversationIDs = [];
-
-        // validate ownership
-        foreach ($conversations as $conversation) {
-            if ($conversation->userID != WCF::getUser()->userID) {
-                $conversationIDs[] = $conversation->conversationID;
-            }
-        }
-
-        // validate participation as non-owner
-        if (!empty($conversationIDs)) {
-            $conditions = new PreparedStatementConditionBuilder();
-            $conditions->add("conversationID IN (?)", [$conversationIDs]);
-            $conditions->add("participantID = ?", [WCF::getUser()->userID]);
-
-            $sql = "SELECT  conversationID
-                    FROM    wcf1_conversation_to_user
-                    " . $conditions;
-            $statement = WCF::getDB()->prepare($sql);
-            $statement->execute($conditions->getParameters());
-            while ($row = $statement->fetchArray()) {
-                $index = \array_search($row['conversationID'], $conversationIDs);
-                unset($conversationIDs[$index]);
-            }
-
-            // remove unaccessible conversations
-            if (!empty($conversationIDs)) {
-                foreach ($conversations as $index => $conversation) {
-                    if (\in_array($conversation->conversationID, $conversationIDs)) {
-                        unset($conversations[$index]);
-                    }
-                }
-            }
-        }
-
-        foreach ($conversations as $conversation) {
-            $this->conversations[$conversation->conversationID] = $conversation;
-        }
-    }
-
-    /**
-     * Validates if user may close the given conversations.
-     *
-     * @return  int[]
-     */
-    protected function validateClose()
-    {
-        $conversationIDs = [];
-
-        foreach ($this->conversations as $conversation) {
-            if (!$conversation->isClosed && $conversation->userID == WCF::getUser()->userID) {
-                $conversationIDs[] = $conversation->conversationID;
-            }
-        }
-
-        return $conversationIDs;
-    }
-
-    /**
-     * Validates conversations available for leaving.
-     *
-     * @return  int[]
-     */
-    public function validateLeave()
-    {
-        $tmpIDs = [];
-        foreach ($this->conversations as $conversation) {
-            $tmpIDs[] = $conversation->conversationID;
-        }
-
-        $conditions = new PreparedStatementConditionBuilder();
-        $conditions->add("conversationID IN (?)", [$tmpIDs]);
-        $conditions->add("participantID = ?", [WCF::getUser()->userID]);
-        $conditions->add("hideConversation <> ?", [1]);
-
-        $sql = "SELECT  conversationID
-                FROM    wcf1_conversation_to_user
-                " . $conditions;
-        $statement = WCF::getDB()->prepare($sql);
-        $statement->execute($conditions->getParameters());
-
-        return $statement->fetchAll(\PDO::FETCH_COLUMN);
-    }
-
-    /**
-     * Validates conversations applicable for mark as read.
-     *
-     * @return  int[]
-     */
-    public function validateMarkAsRead()
-    {
-        $conversationIDs = [];
-
-        $conditions = new PreparedStatementConditionBuilder();
-        $conditions->add("conversationID IN (?)", [\array_keys($this->conversations)]);
-        $conditions->add("participantID = ?", [WCF::getUser()->userID]);
-
-        $sql = "SELECT  conversationID, lastVisitTime
-                FROM    wcf1_conversation_to_user
-                " . $conditions;
-        $statement = WCF::getDB()->prepare($sql);
-        $statement->execute($conditions->getParameters());
-        $lastVisitTime = [];
-        while ($row = $statement->fetchArray()) {
-            $lastVisitTime[$row['conversationID']] = $row['lastVisitTime'];
-        }
-
-        foreach ($this->conversations as $conversation) {
-            if (
-                isset($lastVisitTime[$conversation->conversationID])
-                && $lastVisitTime[$conversation->conversationID] < $conversation->lastPostTime
-            ) {
-                $conversationIDs[] = $conversation->conversationID;
-            }
-        }
-
-        return $conversationIDs;
-    }
-
-    /**
-     * Validates if user may open the given conversations.
-     *
-     * @return  int[]
-     */
-    protected function validateOpen()
-    {
-        $conversationIDs = [];
-
-        foreach ($this->conversations as $conversation) {
-            if ($conversation->isClosed && $conversation->userID == WCF::getUser()->userID) {
-                $conversationIDs[] = $conversation->conversationID;
-            }
-        }
-
-        return $conversationIDs;
-    }
-
-    /**
-     * Validates conversations available for restore.
-     *
-     * @return  int[]
-     */
-    public function validateRestore()
-    {
-        $tmpIDs = [];
-        foreach ($this->conversations as $conversation) {
-            $tmpIDs[] = $conversation->conversationID;
-        }
-
-        $conditions = new PreparedStatementConditionBuilder();
-        $conditions->add("conversationID IN (?)", [$tmpIDs]);
-        $conditions->add("participantID = ?", [WCF::getUser()->userID]);
-        $conditions->add("hideConversation <> ?", [0]);
-
-        $sql = "SELECT  conversationID
-                FROM    wcf1_conversation_to_user
-                " . $conditions;
-        $statement = WCF::getDB()->prepare($sql);
-        $statement->execute($conditions->getParameters());
-
-        return $statement->fetchAll(\PDO::FETCH_COLUMN);
-    }
-}
diff --git a/objectType.xml b/objectType.xml
index 4770498e..60e28252 100644
--- a/objectType.xml
+++ b/objectType.xml
@@ -17,11 +17,6 @@
 			<name>com.woltlab.wcf.conversation.message</name>
 			<definitionname>com.woltlab.wcf.message</definitionname>
 		</type>
-		<type>
-			<name>com.woltlab.wcf.conversation.conversation</name>
-			<definitionname>com.woltlab.wcf.clipboardItem</definitionname>
-			<listclassname>wcf\data\conversation\ConversationList</listclassname>
-		</type>
 		<type>
 			<name>com.woltlab.wcf.conversation.notification</name>
 			<definitionname>com.woltlab.wcf.notification.objectType</definitionname>
@@ -125,5 +120,8 @@
 		<type name="com.woltlab.wcf.conversation.message.search.index">
 			<definitionname>com.woltlab.wcf.rebuildData</definitionname>
 		</type>
+		<type name="com.woltlab.wcf.conversation.conversation">
+			<definitionname>com.woltlab.wcf.clipboardItem</definitionname>
+		</type>
 	</delete>
 </data>

From 8864878b2acf27ef4ac6fc9b5367848b981d939c Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Thu, 26 Jun 2025 13:20:41 +0200
Subject: [PATCH 11/24] Remove unused JavaScript files

---
 fileDelete.xml                                |  15 +
 files/js/WCF.Conversation.js                  | 982 ------------------
 files/js/WCF.Conversation.min.js              |   1 -
 files/js/WCF.Conversation.tiny.min.js         |   1 -
 .../Conversations/AssignConversationLabels.js |  27 -
 .../GetConversationLabelManager.js            |  25 -
 .../Conversations/GetConversationLabels.js    |  27 -
 .../Api/Conversations/LeaveConversation.js    |  27 -
 .../Core/Conversation/Bootstrap.js            |   5 +
 .../Core/Conversation/Clipboard.js            |  44 -
 .../Conversation/Component/EditorHandler.js   | 119 ---
 .../Conversation/Component/Label/Editor.js    |  44 -
 .../Conversation/Component/Label/Manager.js   | 108 --
 .../Core/Conversation/Component/Leave.js      |  44 -
 .../Core/Conversation/Ui/Participant/Add.js   | 117 ---
 templates/__userPanelConversationDropdown.tpl |   1 -
 templates/conversation.tpl                    |  77 +-
 templates/conversationParticipantList.tpl     |  31 +
 .../Conversations/AssignConversationLabels.ts |  26 -
 .../GetConversationLabelManager.ts            |  30 -
 .../Conversations/GetConversationLabels.ts    |  33 -
 .../Api/Conversations/LeaveConversation.ts    |  35 -
 .../Core/Conversation/Clipboard.ts            |  64 --
 .../Conversation/Component/EditorHandler.ts   | 150 ---
 .../Conversation/Component/Label/Editor.ts    |  53 -
 .../Conversation/Component/Label/Manager.ts   | 155 ---
 .../Core/Conversation/Component/Leave.ts      |  52 -
 .../Core/Conversation/Ui/Participant/Add.ts   | 167 ---
 28 files changed, 61 insertions(+), 2399 deletions(-)
 delete mode 100644 files/js/WCF.Conversation.js
 delete mode 100755 files/js/WCF.Conversation.min.js
 delete mode 100644 files/js/WCF.Conversation.tiny.min.js
 delete mode 100644 files/js/WoltLabSuite/Core/Api/Conversations/AssignConversationLabels.js
 delete mode 100644 files/js/WoltLabSuite/Core/Api/Conversations/GetConversationLabelManager.js
 delete mode 100644 files/js/WoltLabSuite/Core/Api/Conversations/GetConversationLabels.js
 delete mode 100644 files/js/WoltLabSuite/Core/Api/Conversations/LeaveConversation.js
 delete mode 100644 files/js/WoltLabSuite/Core/Conversation/Clipboard.js
 delete mode 100644 files/js/WoltLabSuite/Core/Conversation/Component/EditorHandler.js
 delete mode 100644 files/js/WoltLabSuite/Core/Conversation/Component/Label/Editor.js
 delete mode 100644 files/js/WoltLabSuite/Core/Conversation/Component/Label/Manager.js
 delete mode 100644 files/js/WoltLabSuite/Core/Conversation/Component/Leave.js
 delete mode 100644 files/js/WoltLabSuite/Core/Conversation/Ui/Participant/Add.js
 create mode 100644 templates/conversationParticipantList.tpl
 delete mode 100644 ts/WoltLabSuite/Core/Api/Conversations/AssignConversationLabels.ts
 delete mode 100644 ts/WoltLabSuite/Core/Api/Conversations/GetConversationLabelManager.ts
 delete mode 100644 ts/WoltLabSuite/Core/Api/Conversations/GetConversationLabels.ts
 delete mode 100644 ts/WoltLabSuite/Core/Api/Conversations/LeaveConversation.ts
 delete mode 100644 ts/WoltLabSuite/Core/Conversation/Clipboard.ts
 delete mode 100644 ts/WoltLabSuite/Core/Conversation/Component/EditorHandler.ts
 delete mode 100644 ts/WoltLabSuite/Core/Conversation/Component/Label/Editor.ts
 delete mode 100644 ts/WoltLabSuite/Core/Conversation/Component/Label/Manager.ts
 delete mode 100644 ts/WoltLabSuite/Core/Conversation/Component/Leave.ts
 delete mode 100644 ts/WoltLabSuite/Core/Conversation/Ui/Participant/Add.ts

diff --git a/fileDelete.xml b/fileDelete.xml
index a2816d07..f90340b6 100644
--- a/fileDelete.xml
+++ b/fileDelete.xml
@@ -23,5 +23,20 @@
 		<file>lib/system/user/online/location/ConversationLocation.class.php</file>
 		<file>style/conversation.less</file>
 		<file>lib/system/clipboard/action/ConversationClipboardAction.class.php</file>
+		<file>js/WoltLabSuite/Core/Api/Conversations/AssignConversationLabels.js</file>
+		<file>js/WoltLabSuite/Core/Api/Conversations/GetConversationLabelManager.js</file>
+		<file>js/WoltLabSuite/Core/Api/Conversations/GetConversationLabels.js</file>
+		<file>js/WoltLabSuite/Core/Api/Conversations/GetConversationLeaveDialog.js</file>
+		<file>js/WoltLabSuite/Core/Api/Conversations/LeaveConversation.js</file>
+		<file>js/WoltLabSuite/Core/Conversation/Component/EditorHandler.js</file>
+		<file>js/WoltLabSuite/Core/Conversation/Component/Leave.js</file>
+		<file>js/WoltLabSuite/Core/Conversation/Component/Label/Editor.js</file>
+		<file>js/WoltLabSuite/Core/Conversation/Component/Label/Manager.js</file>
+		<file>js/WoltLabSuite/Core/Conversation/Clipboard.js</file>
+		<file>js/WoltLabSuite/Core/Conversation/Ui/Participant/Add.js</file>
+		<file>js/WoltLabSuite/Core/Conversation/Ui/Object/Action/RemoveParticipant.js</file>
+		<file>js/WCF.Conversation.js</file>
+		<file>js/WCF.Conversation.min.js</file>
+		<file>js/WCF.Conversation.tiny.min.js</file>
 	</delete>
 </data>
diff --git a/files/js/WCF.Conversation.js b/files/js/WCF.Conversation.js
deleted file mode 100644
index 4dd0a89e..00000000
--- a/files/js/WCF.Conversation.js
+++ /dev/null
@@ -1,982 +0,0 @@
-/**
- * Namespace for conversations.
- * 
- * @author	Alexander Ebert
- * @copyright	2001-2019 WoltLab GmbH
- * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- */
-WCF.Conversation = { };
-
-/**
- * Core editor handler for conversations.
- *
- * @deprecated 6.2 use `WoltLabSuite/Core/Conversation/EditorHandler` instead
- */
-WCF.Conversation.EditorHandler = Class.extend({
-	/**
-	 * Initializes the core editor handler for conversations.
-	 */
-	init: function (availableLabels) {
-		require(["WoltLabSuite/Core/Conversation/Component/EditorHandler"], ({ setup }) => {
-			setup(availableLabels);
-		});
-	},
-
-	/**
-	 * Returns a permission's value for given conversation id.
-	 *
-	 * @param	integer		conversationID
-	 * @param	string		permission
-	 * @return	boolean
-	 */
-	getPermission: function (conversationID, permission) {
-		switch (permission) {
-			case "canAddParticipants":
-				return require("WoltLabSuite/Core/Conversation/Component/EditorHandler").getConversationEditor(
-					conversationID,
-				).canAddParticipants;
-			case "canCloseConversation":
-				return require("WoltLabSuite/Core/Conversation/Component/EditorHandler").getConversationEditor(
-					conversationID,
-				).canCloseConversation;
-			default:
-				return false;
-		}
-	},
-
-	/**
-	 * Returns an attribute's value for given conversation id.
-	 *
-	 * @param	integer		conversationID
-	 * @param	string		key
-	 * @return	mixed
-	 */
-	getValue: function (conversationID, key) {
-		switch (key) {
-			case "labelIDs":
-				return require("WoltLabSuite/Core/Conversation/Component/EditorHandler").getConversationEditor(
-					conversationID,
-				).labelIDs;
-				break;
-
-			case "isClosed":
-				return require("WoltLabSuite/Core/Conversation/Component/EditorHandler").getConversationEditor(
-					conversationID,
-				).isClosed;
-		}
-	},
-
-	/**
-	 * Counts available labels.
-	 *
-	 * @return	integer
-	 */
-	countAvailableLabels: function () {
-		return require("WoltLabSuite/Core/Conversation/Component/EditorHandler").getAvailableLabels().length;
-	},
-
-	/**
-	 * Returns a list with the data of the available labels.
-	 *
-	 * @return	array<object>
-	 */
-	getAvailableLabels: function () {
-		return require("WoltLabSuite/Core/Conversation/Component/EditorHandler").getAvailableLabels();
-	},
-
-	/**
-	 * Updates conversation data.
-	 *
-	 * @param	integer		conversationID
-	 * @param	object		data
-	 */
-	update: function (conversationID, key, data) {
-		require(["WoltLabSuite/Core/Conversation/Component/EditorHandler"], ({ getConversationEditor }) => {
-			switch (key) {
-				case "close":
-					getConversationEditor(conversationID).isClosed = true;
-					break;
-				case "labelIDs":
-					getConversationEditor(conversationID).labelIDs = data;
-					break;
-				case "open":
-					getConversationEditor(conversationID).isClosed = false;
-					break;
-			}
-		});
-	},
-});
-
-/**
- * Conversation editor handler for conversation page.
- * 
- * @see	WCF.Conversation.EditorHandler
- * @param	array<object>	availableLabels
- *
- * @deprecated 6.2 use `WoltLabSuite/Core/Conversation/EditorHandler` instead
- */
-WCF.Conversation.EditorHandlerConversation = WCF.Conversation.EditorHandler.extend({
-	/**
-	 * @see	WCF.Conversation.EditorHandler.init()
-	 * 
-	 * @param	array<object>	availableLabels
-	 */
-	init: function(availableLabels) {
-		this._super(availableLabels);
-	},
-});
-
-/**
- * Provides extended actions for conversation clipboard actions.
- *
- * @deprecated 6.2 use `WoltLabSuite/Core/Conversation/Clipboard` instead
- */
-WCF.Conversation.Clipboard = Class.extend({
-	/**
-	 * editor handler
-	 * @var	WCF.Conversation.EditorHandler
-	 */
-	_editorHandler: null,
-	
-	/**
-	 * Initializes a new WCF.Conversation.Clipboard object.
-	 * 
-	 * @param	{WCF.Conversation.EditorHandler}	editorHandler
-	 */
-	init: function(editorHandler) {
-		this._editorHandler = editorHandler;
-		
-		WCF.System.Event.addListener('com.woltlab.wcf.clipboard', 'com.woltlab.wcf.conversation.conversation', (function (data) {
-			if (data.responseData === null) {
-				this._execute(data.data.actionName, data.data.parameters);
-			}
-			else {
-				this._evaluateResponse(data.data.actionName, data.responseData);
-			}
-		}).bind(this));
-	},
-	
-	/**
-	 * Handles clipboard actions.
-	 * 
-	 * @param	{string}	actionName
-	 * @param	{Object}	parameters
-	 */
-	_execute: function(actionName, parameters) {
-		if (actionName === 'com.woltlab.wcf.conversation.conversation.assignLabel') {
-			new WCF.Conversation.Label.Editor(this._editorHandler, null, parameters.objectIDs);
-		}
-	},
-	
-	/**
-	 * Evaluates AJAX responses.
-	 * 
-	 * @param	{Object}	data
-	 * @param	{string}	actionName
-	 */
-	_evaluateResponse: function(actionName, data) {
-		switch (actionName) {
-			case 'com.woltlab.wcf.conversation.conversation.leave':
-			case 'com.woltlab.wcf.conversation.conversation.leavePermanently':
-			case 'com.woltlab.wcf.conversation.conversation.markAsRead':
-			case 'com.woltlab.wcf.conversation.conversation.restore':
-				window.location.reload();
-			break;
-			
-			case 'com.woltlab.wcf.conversation.conversation.close':
-			case 'com.woltlab.wcf.conversation.conversation.open':
-				//noinspection JSUnresolvedVariable
-				for (var conversationId in data.returnValues.conversationData) {
-					//noinspection JSUnresolvedVariable
-					if (data.returnValues.conversationData.hasOwnProperty(conversationId)) {
-						//noinspection JSUnresolvedVariable
-						var $data = data.returnValues.conversationData[conversationId];
-						
-						this._editorHandler.update(conversationId, ($data.isClosed ? 'close' : 'open'), $data);
-					}
-				}
-			break;
-		}
-	}
-});
-
-/**
- * Inline editor implementation for conversations.
- * 
- * @see	WCF.Inline.Editor
- */
-WCF.Conversation.InlineEditor = WCF.InlineEditor.extend({
-	/**
-	 * editor handler object
-	 * @var	WCF.Conversation.EditorHandler
-	 */
-	_editorHandler: null,
-	
-	/**
-	 * execution environment
-	 * @var	string
-	 */
-	_environment: 'conversation',
-	
-	/**
-	 * @see	WCF.InlineEditor._setOptions()
-	 */
-	_setOptions: function() {
-		this._options = [
-			// edit title
-			{ label: WCF.Language.get('wcf.conversation.edit.subject'), optionName: 'editSubject' },
-			
-			// isClosed
-			{ label: WCF.Language.get('wcf.conversation.edit.close'), optionName: 'close' },
-			{ label: WCF.Language.get('wcf.conversation.edit.open'), optionName: 'open' },
-			
-			// assign labels
-			{ label: WCF.Language.get('wcf.conversation.edit.assignLabel'), optionName: 'assignLabel' },
-			
-			// divider
-			{ optionName: 'divider' },
-			
-			// add participants
-			{ label: WCF.Language.get('wcf.conversation.edit.addParticipants'), optionName: 'addParticipants' },
-			
-			// leave conversation
-			{ label: WCF.Language.get('wcf.conversation.edit.leave'), optionName: 'leave' },
-			
-			// edit draft
-			{ label: WCF.Language.get('wcf.global.button.edit'), optionName: 'edit', isQuickOption: true }
-		];
-	},
-	
-	/**
-	 * Sets editor handler object.
-	 * 
-	 * @param	WCF.Conversation.EditorHandler	editorHandler
-	 * @param	string				environment
-	 */
-	setEditorHandler: function(editorHandler, environment) {
-		this._editorHandler = editorHandler;
-		this._environment = (environment == 'list') ? 'list' : 'conversation';
-	},
-	
-	/**
-	 * @see	WCF.InlineEditor._getTriggerElement()
-	 */
-	_getTriggerElement: function(element) {
-		return element.find('.jsConversationInlineEditor');
-	},
-	
-	/**
-	 * @see	WCF.InlineEditor._validate()
-	 */
-	_validate: function(elementID, optionName) {
-		var $conversationID = $('#' + elementID).data('conversationID');
-		
-		switch (optionName) {
-			case 'addParticipants':
-				return (this._editorHandler.getPermission($conversationID, 'canAddParticipants'));
-			break;
-			
-			case 'assignLabel':
-				return (this._editorHandler.countAvailableLabels()) ? true : false;
-			break;
-			
-			case 'editSubject':
-				return (!!this._editorHandler.getPermission($conversationID, 'canCloseConversation'));
-			break;
-			
-			case 'close':
-			case 'open':
-				if (!this._editorHandler.getPermission($conversationID, 'canCloseConversation')) {
-					return false;
-				}
-				
-				if (optionName === 'close') return !(this._editorHandler.getValue($conversationID, 'isClosed'));
-				else return (this._editorHandler.getValue($conversationID, 'isClosed'));
-			break;
-			
-			case 'leave':
-				return true;
-			break;
-			
-			case 'edit':
-				return ($('#' + elementID).data('isDraft') ? true : false);
-			break;
-		}
-		
-		return false;
-	},
-	
-	/**
-	 * @see	WCF.InlineEditor._execute()
-	 */
-	_execute: function(elementID, optionName) {
-		// abort if option is invalid or not accessible
-		if (!this._validate(elementID, optionName)) {
-			return false;
-		}
-		
-		switch (optionName) {
-			case 'addParticipants':
-				require(['WoltLabSuite/Core/Conversation/Ui/Participant/Add'], function(UiParticipantAdd) {
-					new UiParticipantAdd(elData(elById(elementID), 'conversation-id'));
-				});
-			break;
-			
-			case 'assignLabel':
-				new WCF.Conversation.Label.Editor(this._editorHandler, elementID);
-			break;
-			
-			case 'editSubject':
-				require(['WoltLabSuite/Core/Conversation/Ui/Subject/Editor'], function (UiSubjectEditor) {
-					UiSubjectEditor.beginEdit(elData(elById(elementID), 'conversation-id'));
-				});
-			break;
-			
-			case 'close':
-			case 'open':
-				this._updateConversation(elementID, optionName, { isClosed: (optionName === 'close' ? 1 : 0) });
-			break;
-			
-			case 'leave':
-				require(["WoltLabSuite/Core/Conversation/Component/Leave"], ({ openDialog }) => {
-				  openDialog(elData(elById(elementID), "conversation-id"), this._environment);
-				});
-			break;
-			
-			case 'edit':
-				window.location = this._getTriggerElement($('#' + elementID)).prop('href');
-			break;
-		}
-	},
-	
-	/**
-	 * Updates conversation properties.
-	 * 
-	 * @param	string		elementID
-	 * @param	string		optionName
-	 * @param	object		data
-	 */
-	_updateConversation: function(elementID, optionName, data) {
-		var $conversationID = this._elements[elementID].data('conversationID');
-		
-		switch (optionName) {
-			case 'close':
-			case 'editSubject':
-			case 'open':
-				this._updateData.push({
-					elementID: elementID,
-					optionName: optionName,
-					data: data
-				});
-				
-				this._proxy.setOption('data', {
-					actionName: optionName,
-					className: 'wcf\\data\\conversation\\ConversationAction',
-					objectIDs: [ $conversationID ]
-				});
-				this._proxy.sendRequest();
-			break;
-		}
-	},
-	
-	/**
-	 * @see	WCF.InlineEditor._updateState()
-	 */
-	_updateState: function() {
-		for (var $i = 0, $length = this._updateData.length; $i < $length; $i++) {
-			var $data = this._updateData[$i];
-			var $conversationID = this._elements[$data.elementID].data('conversationID');
-			
-			switch ($data.optionName) {
-				case 'close':
-				case 'editSubject':
-				case 'open':
-					this._editorHandler.update($conversationID, $data.optionName, $data.data);
-				break;
-			}
-		}
-	}
-});
-
-/**
- * Provides a dialog for leaving or restoring conversation.
- * 
- * @param	array<integer>		conversationIDs
- *
- * @deprecated 6.2 use `WoltLabSuite/Core/Conversation/Component/Leave` instead
- */
-WCF.Conversation.Leave = Class.extend({
-	/**
-	 * list of conversation ids
-	 * @var	array<integer>
-	 */
-	_conversationIDs: [ ],
-	
-	/**
-	 * dialog overlay
-	 * @var	jQuery
-	 */
-	_dialog: null,
-	
-	/**
-	 * environment name
-	 * @var	string
-	 */
-	_environment: '',
-	
-	/**
-	 * action proxy
-	 * @var	WCF.Action.Proxy
-	 */
-	_proxy: null,
-	
-	/**
-	 * Initializes the leave/restore dialog for conversations.
-	 * 
-	 * @param	array<integer>		conversationIDs
-	 * @param	string			environment
-	 */
-	init: function(conversationIDs, environment) {
-		this._conversationIDs = conversationIDs;
-		this._dialog = null;
-		this._environment = environment;
-		
-		this._proxy = new WCF.Action.Proxy({
-			success: $.proxy(this._success, this)
-		});
-		
-		this._loadDialog();
-	},
-	
-	/**
-	 * Loads the dialog overlay.
-	 */
-	_loadDialog: function() {
-		this._proxy.setOption('data', {
-			actionName: 'getLeaveForm',
-			className: 'wcf\\data\\conversation\\ConversationAction',
-			objectIDs: this._conversationIDs
-		});
-		this._proxy.sendRequest();
-	},
-	
-	/**
-	 * Handles successful AJAX requests.
-	 * 
-	 * @param	object		data
-	 * @param	string		textStatus
-	 * @param	jQuery		jqXHR
-	 */
-	_success: function(data, textStatus, jqXHR) {
-		switch (data.returnValues.actionName) {
-			case 'getLeaveForm':
-				this._showDialog(data);
-			break;
-			
-			case 'hideConversation':
-				if (this._environment === 'conversation') {
-					window.location = data.returnValues.redirectURL;
-				}
-				else {
-					window.location.reload();
-				}
-			break;
-		}
-	},
-	
-	/**
-	 * Displays the leave/restore conversation dialog overlay.
-	 * 
-	 * @param	object		data
-	 */
-	_showDialog: function(data) {
-		if (this._dialog === null) {
-			this._dialog = $('#leaveDialog');
-			if (!this._dialog.length) {
-				this._dialog = $('<div id="leaveDialog" />').hide().appendTo(document.body);
-			}
-		}
-		
-		// render dialog
-		this._dialog.html(data.returnValues.template);
-		this._dialog.wcfDialog({
-			title: WCF.Language.get('wcf.conversation.leave.title')
-		});
-		
-		this._dialog.wcfDialog('render');
-		
-		// bind event listener
-		this._dialog.find('#hideConversation').click($.proxy(this._click, this));
-	},
-	
-	/**
-	 * Handles conversation state changes.
-	 */
-	_click: function() {
-		var $input = this._dialog.find('input[type=radio]:checked');
-		if ($input.length === 1) {
-			this._proxy.setOption('data', {
-				actionName: 'hideConversation',
-				className: 'wcf\\data\\conversation\\ConversationAction',
-				objectIDs: this._conversationIDs,
-				parameters: {
-					hideConversation: $input.val()
-				}
-			});
-			this._proxy.sendRequest();
-		}
-	}
-});
-
-/**
- * Namespace for label-related classes.
- */
-WCF.Conversation.Label = { };
-
-/**
- * Providers an editor for conversation labels.
- * 
- * @param	WCF.Conversation.EditorHandler	editorHandler
- * @param	string				elementID
- * @param	array<integer>			conversationIDs
- *
- * @deprecated 6.2 Use `WoltLabSuite/Core/Conversation/Component/Label/Editor` instead
- */
-WCF.Conversation.Label.Editor = Class.extend({
-	/**
-	 * list of conversation id
-	 * @var	array<integer>
-	 */
-	_conversationIDs: 0,
-	
-	/**
-	 * dialog object
-	 * @var	jQuery
-	 */
-	_dialog: null,
-	
-	/**
-	 * editor handler object
-	 * @var	WCF.Conversation.EditorHandler
-	 */
-	_editorHandler: null,
-	
-	/**
-	 * system notification object
-	 * @var	WCF.System.Notification
-	 */
-	_notification: null,
-	
-	/**
-	 * action proxy object
-	 * @var	WCF.Action.Proxy
-	 */
-	_proxy: null,
-	
-	/**
-	 * Initializes the label editor for given conversation.
-	 * 
-	 * @param	WCF.Conversation.EditorHandler	editorHandler
-	 * @param	string				elementID
-	 * @param	array<integer>			conversationIDs
-	 */
-	init: function(editorHandler, elementID, conversationIDs) {
-		if (elementID) {
-			this._conversationIDs = [ $('#' + elementID).data('conversationID') ];
-		}
-		else {
-			this._conversationIDs = conversationIDs;
-		}
-		
-		this._dialog = null;
-		this._editorHandler = editorHandler;
-		
-		this._notification = new WCF.System.Notification(WCF.Language.get('wcf.global.success.edit'));
-		this._proxy = new WCF.Action.Proxy({
-			success: $.proxy(this._success, this)
-		});
-		
-		this._loadDialog();
-	},
-	
-	/**
-	 * Loads label assignment dialog.
-	 */
-	_loadDialog: function() {
-		this._proxy.setOption('data', {
-			actionName: 'getLabelForm',
-			className: 'wcf\\data\\conversation\\label\\ConversationLabelAction',
-			parameters: {
-				conversationIDs: this._conversationIDs
-			}
-		});
-		this._proxy.sendRequest();
-	},
-	
-	/**
-	 * Handles successful AJAX requests.
-	 * 
-	 * @param	object		data
-	 * @param	string		textStatus
-	 * @param	jQuery		jqXHR
-	 */
-	_success: function(data, textStatus, jqXHR) {
-		switch (data.returnValues.actionName) {
-			case 'assignLabel':
-				this._assignLabels(data);
-			break;
-			
-			case 'getLabelForm':
-				this._renderDialog(data);
-			break;
-		}
-	},
-	
-	/**
-	 * Renders the label assignment form overlay.
-	 * 
-	 * @param	object		data
-	 */
-	_renderDialog: function(data) {
-		if (this._dialog === null) {
-			this._dialog = $('#conversationLabelForm');
-			if (!this._dialog.length) {
-				this._dialog = $('<div id="conversationLabelForm" />').hide().appendTo(document.body);
-			}
-		}
-		
-		this._dialog.html(data.returnValues.template);
-		this._dialog.wcfDialog({
-			title: WCF.Language.get('wcf.conversation.label.assignLabels')
-		});
-		this._dialog.wcfDialog('render');
-		
-		$('#assignLabels').click($.proxy(this._save, this));
-	},
-	
-	/**
-	 * Saves label assignments for current conversation id.
-	 */
-	_save: function() {
-		var $labelIDs = [ ];
-		this._dialog.find('input').each(function(index, checkbox) {
-			var $checkbox = $(checkbox);
-			if ($checkbox.is(':checked')) {
-				$labelIDs.push($checkbox.data('labelID'));
-			}
-		});
-		
-		this._proxy.setOption('data', {
-			actionName: 'assignLabel',
-			className: 'wcf\\data\\conversation\\label\\ConversationLabelAction',
-			parameters: {
-				conversationIDs: this._conversationIDs,
-				labelIDs: $labelIDs
-			}
-		});
-		this._proxy.sendRequest();
-	},
-	
-	/**
-	 * Updates conversation labels.
-	 * 
-	 * @param	object		data
-	 */
-	_assignLabels: function(data) {
-		// update conversation
-		for (var $i = 0, $length = this._conversationIDs.length; $i < $length; $i++) {
-			this._editorHandler.update(this._conversationIDs[$i], 'labelIDs', data.returnValues.labelIDs);
-		}
-		
-		// close dialog and show a 'success' notice
-		this._dialog.wcfDialog('close');
-		this._notification.show();
-	}
-});
-
-/**
- * Label manager for conversations.
- * 
- * @param	string		link
- *
- * @deprecated 6.2 use `WoltLabSuite/Core/Conversation/Component/Label/Manager` instead
- */
-WCF.Conversation.Label.Manager = Class.extend({
-	/**
-	 * deleted label id
-	 * @var	integer
-	 */
-	_deletedLabelID: 0,
-	
-	/**
-	 * dialog object
-	 * @var	jQuery
-	 */
-	_dialog: null,
-	
-	/**
-	 * list of labels
-	 * @var	jQuery
-	 */
-	_labels: null,
-	
-	/**
-	 * parsed label link
-	 * @var	string
-	 */
-	_link: '',
-	
-	/**
-	 * system notification object
-	 * @var	WCF.System.Notification
-	 */
-	_notification: '',
-	
-	/**
-	 * action proxy object
-	 * @var	WCF.Action.Proxy
-	 */
-	_proxy: null,
-	
-	/**
-	 * maximum number of labels the user may create
-	 * @var	integer
-	 */
-	_maxLabels: 0,
-	
-	/**
-	 * number of labels the user created
-	 * @var	integer
-	 */
-	_labelCount: 0,
-	
-	/**
-	 * Initializes the label manager for conversations.
-	 * 
-	 * @param	string		link
-	 */
-	init: function(link) {
-		this._deletedLabelID = 0;
-		this._maxLabels = 0;
-		this._labelCount = 0;
-		this._link = link;
-		
-		this._labels = WCF.Dropdown.getDropdownMenu('conversationLabelFilter').children('.scrollableDropdownMenu');
-		$('#manageLabel').click($.proxy(this._click, this));
-		
-		this._notification = new WCF.System.Notification(WCF.Language.get('wcf.conversation.label.management.addLabel.success'));
-		this._proxy = new WCF.Action.Proxy({
-			success: $.proxy(this._success, this)
-		});
-	},
-	
-	/**
-	 * Handles clicks on the 'manage labels' button.
-	 */
-	_click: function() {
-		this._proxy.setOption('data', {
-			actionName: 'getLabelManagement',
-			className: 'wcf\\data\\conversation\\ConversationAction'
-		});
-		this._proxy.sendRequest();
-	},
-	
-	/**
-	 * Handles successful AJAX requests.
-	 * 
-	 * @param	object		data
-	 * @param	string		textStatus
-	 * @param	jQuery		jqXHR
-	 */
-	_success: function(data, textStatus, jqXHR) {
-		if (this._dialog === null) {
-			this._dialog = $('<div id="labelManagement" />').hide().appendTo(document.body);
-		}
-		
-		if (data.returnValues && data.returnValues.actionName) {
-			switch (data.returnValues.actionName) {
-				case 'add':
-					this._insertLabel(data);
-				break;
-				
-				case 'getLabelManagement':
-					this._maxLabels = parseInt(data.returnValues.maxLabels);
-					this._labelCount = parseInt(data.returnValues.labelCount);
-					
-					// render dialog
-					this._dialog.empty().html(data.returnValues.template);
-					this._dialog.wcfDialog({
-						title: WCF.Language.get('wcf.conversation.label.management')
-					});
-					this._dialog.wcfDialog('render');
-					
-					// bind action listeners
-					this._bindListener();
-				break;
-			}
-		}
-		else {
-			// check if delete label id is present within URL (causing an IllegalLinkException if reloading)
-			if (this._deletedLabelID) {
-				var $regex = new RegExp('(\\?|&)labelID=' + this._deletedLabelID);
-				window.location = window.location.toString().replace($regex, '');
-			}
-			else {
-				// reload page
-				window.location.reload();
-			}
-		}
-	},
-	
-	/**
-	 * Inserts a previously created label.
-	 * 
-	 * @param	object		data
-	 */
-	_insertLabel: function(data) {
-		var $listItem = $('<li><a href="' + this._link + '&labelID=' + data.returnValues.labelID + '"><span class="badge label' + (data.returnValues.cssClassName ? ' ' + data.returnValues.cssClassName : '') + '">' + data.returnValues.label + '</span></a></li>');
-		$listItem.find('a > span').data('labelID', data.returnValues.labelID).data('cssClassName', data.returnValues.cssClassName);
-		
-		this._labels.append($listItem);
-		
-		this._notification.show();
-		
-		this._labelCount++;
-		
-		if (this._labelCount >= this._maxLabels) {
-			$('#conversationLabelManagementForm').hide();
-		}
-	},
-	
-	/**
-	 * Binds event listener for label management.
-	 */
-	_bindListener: function() {
-		$('#labelName').on('keyup keydown keypress', $.proxy(this._updateLabels, this));
-		if ($.browser.mozilla && $.browser.touch) {
-			$('#labelName').on('input', $.proxy(this._updateLabels, this));
-		}
-		
-		if (this._labelCount >= this._maxLabels) {
-			$('#conversationLabelManagementForm').hide();
-			this._dialog.wcfDialog('render');
-		}
-		
-		$('#addLabel').disable().click($.proxy(this._addLabel, this));
-		$('#editLabel').disable();
-		
-		this._dialog.find('.conversationLabelList a.label').click($.proxy(this._edit, this));
-	},
-	
-	/**
-	 * Prepares a label for editing.
-	 * 
-	 * @param	object		event
-	 */
-	_edit: function(event) {
-		if (this._labelCount >= this._maxLabels) {
-			$('#conversationLabelManagementForm').show();
-			this._dialog.wcfDialog('render');
-		}
-		
-		var $label = $(event.currentTarget);
-		
-		// replace legends
-		var $legend = WCF.Language.get('wcf.conversation.label.management.editLabel').replace(/#labelName#/, WCF.String.escapeHTML($label.text()));
-		$('#conversationLabelManagementForm').data('labelID', $label.data('labelID')).children('.sectionTitle').html($legend);
-		
-		// update text input
-		$('#labelName').val($label.text()).trigger('keyup');
-		
-		// select css class name
-		var $cssClassName = $label.data('cssClassName');
-		$('#labelManagementList input').each(function(index, input) {
-			var $input = $(input);
-			
-			if ($input.val() == $cssClassName) {
-				$input.attr('checked', 'checked');
-			}
-		});
-		
-		// toggle buttons
-		$('#addLabel').hide();
-		$('#editLabel').show().click($.proxy(this._editLabel, this));
-		$('#deleteLabel').show().click($.proxy(this._deleteLabel, this));
-	},
-	
-	/**
-	 * Edits a label.
-	 */
-	_editLabel: function() {
-		this._proxy.setOption('data', {
-			actionName: 'update',
-			className: 'wcf\\data\\conversation\\label\\ConversationLabelAction',
-			objectIDs: [ $('#conversationLabelManagementForm').data('labelID') ],
-			parameters: {
-				data: {
-					cssClassName: $('#labelManagementList input:checked').val(),
-					label: $('#labelName').val()
-				}
-			}
-		});
-		this._proxy.sendRequest();
-	},
-	
-	/**
-	 * Deletes a label.
-	 */
-	_deleteLabel: function() {
-		var $title = WCF.Language.get('wcf.conversation.label.management.deleteLabel.confirmMessage').replace(/#labelName#/, $('#labelName').val());
-		WCF.System.Confirmation.show($title, $.proxy(function(action) {
-			if (action === 'confirm') {
-				this._proxy.setOption('data', {
-					actionName: 'delete',
-					className: 'wcf\\data\\conversation\\label\\ConversationLabelAction',
-					objectIDs: [ $('#conversationLabelManagementForm').data('labelID') ]
-				});
-				this._proxy.sendRequest();
-				
-				this._deletedLabelID = $('#conversationLabelManagementForm').data('labelID');
-			}
-		}, this), undefined, undefined, true);
-	},
-	
-	/**
-	 * Updates label text within label management.
-	 */
-	_updateLabels: function() {
-		var $value = $.trim($('#labelName').val());
-		if ($value) {
-			$('#addLabel, #editLabel').enable();
-		}
-		else {
-			$('#addLabel, #editLabel').disable();
-			$value = WCF.Language.get('wcf.conversation.label.placeholder');
-		}
-		
-		$('#labelManagementList').find('span.label').text($value);
-	},
-	
-	/**
-	 * Sends an AJAX request to add a new label.
-	 */
-	_addLabel: function() {
-		var $labelName = $('#labelName').val();
-		var $cssClassName = $('#labelManagementList input:checked').val();
-		
-		this._proxy.setOption('data', {
-			actionName: 'add',
-			className: 'wcf\\data\\conversation\\label\\ConversationLabelAction',
-			parameters: {
-				data: {
-					cssClassName: $cssClassName,
-					labelName: $labelName
-				}
-			}
-		});
-		this._proxy.sendRequest();
-		
-		// close dialog
-		this._dialog.wcfDialog('close');
-	}
-});
diff --git a/files/js/WCF.Conversation.min.js b/files/js/WCF.Conversation.min.js
deleted file mode 100755
index 7c3254f0..00000000
--- a/files/js/WCF.Conversation.min.js
+++ /dev/null
@@ -1 +0,0 @@
-WCF.Conversation={},WCF.Conversation.EditorHandler=Class.extend({_attributes:{},_conversations:{},_permissions:{},init:function(availableLabels){this._conversations={};var self=this;$(".conversation").each((function(index,conversation){var $labelIDs,$conversation=$(conversation),$conversationID=$conversation.data("conversationID");self._conversations[$conversationID]||(self._conversations[$conversationID]=$conversation,$labelIDs=eval($conversation.data("labelIDs")),self._attributes[$conversationID]={isClosed:!!$conversation.data("isClosed"),labelIDs:$labelIDs},self._permissions[$conversationID]={canAddParticipants:!!$conversation.data("canAddParticipants"),canCloseConversation:!!$conversation.data("canCloseConversation")})}))},getPermission:function(e,a){return void 0!==this._permissions[e][a]&&!!this._permissions[e][a]},getValue:function(e,a){switch(a){case"labelIDs":return void 0===this._attributes[e].labelIDs&&(this._attributes[e].labelIDs=[]),this._attributes[e].labelIDs;case"isClosed":return!!this._attributes[e].isClosed}},countAvailableLabels:function(){return this.getAvailableLabels().length},getAvailableLabels:function(){var e=[];return WCF.Dropdown.getDropdownMenu("conversationLabelFilter").children(".scrollableDropdownMenu").children("li").each((function(a,t){var n,s=$(t);if(s.hasClass("dropdownDivider"))return!1;n=s.find("span"),e.push({cssClassName:n.data("cssClassName"),labelID:n.data("labelID"),label:n.text()})})),e},update:function(e,a,t){var n,s,i,o,l,r;if(this._conversations[e]){switch(n=this._conversations[e],a){case"close":$(`<li>\n\t\t\t\t\t<span class="jsTooltip jsIconLock" title="${WCF.Language.get("wcf.global.state.closed")}">\n\t\t\t\t\t\t<fa-icon size="16" name="lock"></fa-icon>\n\t\t\t\t\t</span>\n\t\t\t\t</li>`).prependTo(n.find(".statusIcons")),this._attributes[e].isClosed=1;break;case"labelIDs":if(s={},WCF.Dropdown.getDropdownMenu("conversationLabelFilter").find("li > a > span").each((function(e,a){var t=$(a);s[t.data("labelID")]={cssClassName:t.data("cssClassName"),label:t.text(),url:t.parent().attr("href")}})),i=n.find(".columnSubject > .labelList"),t.length)for(i.length||(i=$('<ul class="labelList" />').prependTo(n.find(".columnSubject"))),i.empty(),o=0,l=t.length;o<l;o++)r=s[t[o]],$('<li><a href="'+r.url+'" class="badge label'+(r.cssClassName?" "+r.cssClassName:"")+'">'+WCF.String.escapeHTML(r.label)+"</a></li>").appendTo(i);else i.length&&i.remove();break;case"open":n.find(".statusIcons li").each((function(e,a){var t=$(a);if(t.children("span.jsIconLock").length)return t.remove(),!1})),this._attributes[e].isClosed=0}WCF.Clipboard.reload()}else console.debug("[WCF.Conversation.EditorHandler] Unknown conversation id '"+e+"'")}}),WCF.Conversation.EditorHandlerConversation=WCF.Conversation.EditorHandler.extend({_availableLabels:null,init:function(e){this._availableLabels=e||[],this._super()},getAvailableLabels:function(){return this._availableLabels},update:function(e,a,t){var n,s,i,o;if(this._conversations[e])switch(n=$(".contentHeaderTitle > .contentHeaderMetaData"),a){case"close":$(`<li>\n\t\t\t\t\t<fa-icon size="16" name="lock"></fa-icon>\n\t\t\t\t\t${WCF.Language.get("wcf.global.state.closed")}\n\t\t\t\t</li>`).appendTo(n),this._attributes[e].isClosed=1;break;case"labelIDs":s=n.find(".labelList"),t.length?(i=this.getAvailableLabels(),s.length||(s=(s=$('<li>\n\t\t\t\t\t\t\t<fa-icon size="16" name="tags"></fa-icon>\n\t\t\t\t\t\t\t<ul class="labelList"></ul>\n\t\t\t\t\t\t</li>').prependTo(n)).children("ul")),o="",t.forEach((function(e){i.forEach((function(a){a.labelID==e&&(o+='<li><span class="label badge'+(a.cssClassName?" "+a.cssClassName:"")+'">'+a.label+"</span></li>")}))})),s[0].innerHTML=o):s.parent().remove();break;case"open":n.find(".jsIconLock").parent().remove(),this._attributes[e].isClosed=0}else console.debug("[WCF.Conversation.EditorHandler] Unknown conversation id '"+e+"'")}}),WCF.Conversation.Clipboard=Class.extend({_editorHandler:null,init:function(e){this._editorHandler=e,WCF.System.Event.addListener("com.woltlab.wcf.clipboard","com.woltlab.wcf.conversation.conversation",function(e){null===e.responseData?this._execute(e.data.actionName,e.data.parameters):this._evaluateResponse(e.data.actionName,e.responseData)}.bind(this))},_execute:function(e,a){"com.woltlab.wcf.conversation.conversation.assignLabel"===e&&new WCF.Conversation.Label.Editor(this._editorHandler,null,a.objectIDs)},_evaluateResponse:function(e,a){var t,n;switch(e){case"com.woltlab.wcf.conversation.conversation.leave":case"com.woltlab.wcf.conversation.conversation.leavePermanently":case"com.woltlab.wcf.conversation.conversation.markAsRead":case"com.woltlab.wcf.conversation.conversation.restore":window.location.reload();break;case"com.woltlab.wcf.conversation.conversation.close":case"com.woltlab.wcf.conversation.conversation.open":for(t in a.returnValues.conversationData)a.returnValues.conversationData.hasOwnProperty(t)&&(n=a.returnValues.conversationData[t],this._editorHandler.update(t,n.isClosed?"close":"open",n))}}}),WCF.Conversation.InlineEditor=WCF.InlineEditor.extend({_editorHandler:null,_environment:"conversation",_setOptions:function(){this._options=[{label:WCF.Language.get("wcf.conversation.edit.subject"),optionName:"editSubject"},{label:WCF.Language.get("wcf.conversation.edit.close"),optionName:"close"},{label:WCF.Language.get("wcf.conversation.edit.open"),optionName:"open"},{label:WCF.Language.get("wcf.conversation.edit.assignLabel"),optionName:"assignLabel"},{optionName:"divider"},{label:WCF.Language.get("wcf.conversation.edit.addParticipants"),optionName:"addParticipants"},{label:WCF.Language.get("wcf.conversation.edit.leave"),optionName:"leave"},{label:WCF.Language.get("wcf.global.button.edit"),optionName:"edit",isQuickOption:!0}]},setEditorHandler:function(e,a){this._editorHandler=e,this._environment="list"==a?"list":"conversation"},_getTriggerElement:function(e){return e.find(".jsConversationInlineEditor")},_validate:function(e,a){var t=$("#"+e).data("conversationID");switch(a){case"addParticipants":return this._editorHandler.getPermission(t,"canAddParticipants");case"assignLabel":return!!this._editorHandler.countAvailableLabels();case"editSubject":return!!this._editorHandler.getPermission(t,"canCloseConversation");case"close":case"open":return!!this._editorHandler.getPermission(t,"canCloseConversation")&&("close"===a?!this._editorHandler.getValue(t,"isClosed"):this._editorHandler.getValue(t,"isClosed"));case"leave":return!0;case"edit":return!!$("#"+e).data("isDraft")}return!1},_execute:function(e,a){if(!this._validate(e,a))return!1;switch(a){case"addParticipants":require(["WoltLabSuite/Core/Conversation/Ui/Participant/Add"],(function(a){new a(elData(elById(e),"conversation-id"))}));break;case"assignLabel":new WCF.Conversation.Label.Editor(this._editorHandler,e);break;case"editSubject":require(["WoltLabSuite/Core/Conversation/Ui/Subject/Editor"],(function(a){a.beginEdit(elData(elById(e),"conversation-id"))}));break;case"close":case"open":this._updateConversation(e,a,{isClosed:"close"===a?1:0});break;case"leave":new WCF.Conversation.Leave([$("#"+e).data("conversationID")],this._environment);break;case"edit":window.location=this._getTriggerElement($("#"+e)).prop("href")}},_updateConversation:function(e,a,t){var n=this._elements[e].data("conversationID");switch(a){case"close":case"editSubject":case"open":this._updateData.push({elementID:e,optionName:a,data:t}),this._proxy.setOption("data",{actionName:a,className:"wcf\\data\\conversation\\ConversationAction",objectIDs:[n]}),this._proxy.sendRequest()}},_updateState:function(){var e,a,t,n;for(e=0,a=this._updateData.length;e<a;e++)switch(t=this._updateData[e],n=this._elements[t.elementID].data("conversationID"),t.optionName){case"close":case"editSubject":case"open":this._editorHandler.update(n,t.optionName,t.data)}}}),WCF.Conversation.Leave=Class.extend({_conversationIDs:[],_dialog:null,_environment:"",_proxy:null,init:function(e,a){this._conversationIDs=e,this._dialog=null,this._environment=a,this._proxy=new WCF.Action.Proxy({success:$.proxy(this._success,this)}),this._loadDialog()},_loadDialog:function(){this._proxy.setOption("data",{actionName:"getLeaveForm",className:"wcf\\data\\conversation\\ConversationAction",objectIDs:this._conversationIDs}),this._proxy.sendRequest()},_success:function(e,a,t){switch(e.returnValues.actionName){case"getLeaveForm":this._showDialog(e);break;case"hideConversation":"conversation"===this._environment?window.location=e.returnValues.redirectURL:window.location.reload()}},_showDialog:function(e){null===this._dialog&&(this._dialog=$("#leaveDialog"),this._dialog.length||(this._dialog=$('<div id="leaveDialog" />').hide().appendTo(document.body))),this._dialog.html(e.returnValues.template),this._dialog.wcfDialog({title:WCF.Language.get("wcf.conversation.leave.title")}),this._dialog.wcfDialog("render"),this._dialog.find("#hideConversation").click($.proxy(this._click,this))},_click:function(){var e=this._dialog.find("input[type=radio]:checked");1===e.length&&(this._proxy.setOption("data",{actionName:"hideConversation",className:"wcf\\data\\conversation\\ConversationAction",objectIDs:this._conversationIDs,parameters:{hideConversation:e.val()}}),this._proxy.sendRequest())}}),WCF.Conversation.Label={},WCF.Conversation.Label.Editor=Class.extend({_conversationIDs:0,_dialog:null,_editorHandler:null,_notification:null,_proxy:null,init:function(e,a,t){this._conversationIDs=a?[$("#"+a).data("conversationID")]:t,this._dialog=null,this._editorHandler=e,this._notification=new WCF.System.Notification(WCF.Language.get("wcf.global.success.edit")),this._proxy=new WCF.Action.Proxy({success:$.proxy(this._success,this)}),this._loadDialog()},_loadDialog:function(){this._proxy.setOption("data",{actionName:"getLabelForm",className:"wcf\\data\\conversation\\label\\ConversationLabelAction",parameters:{conversationIDs:this._conversationIDs}}),this._proxy.sendRequest()},_success:function(e,a,t){switch(e.returnValues.actionName){case"assignLabel":this._assignLabels(e);break;case"getLabelForm":this._renderDialog(e)}},_renderDialog:function(e){null===this._dialog&&(this._dialog=$("#conversationLabelForm"),this._dialog.length||(this._dialog=$('<div id="conversationLabelForm" />').hide().appendTo(document.body))),this._dialog.html(e.returnValues.template),this._dialog.wcfDialog({title:WCF.Language.get("wcf.conversation.label.assignLabels")}),this._dialog.wcfDialog("render"),$("#assignLabels").click($.proxy(this._save,this))},_save:function(){var e=[];this._dialog.find("input").each((function(a,t){var n=$(t);n.is(":checked")&&e.push(n.data("labelID"))})),this._proxy.setOption("data",{actionName:"assignLabel",className:"wcf\\data\\conversation\\label\\ConversationLabelAction",parameters:{conversationIDs:this._conversationIDs,labelIDs:e}}),this._proxy.sendRequest()},_assignLabels:function(e){for(var a=0,t=this._conversationIDs.length;a<t;a++)this._editorHandler.update(this._conversationIDs[a],"labelIDs",e.returnValues.labelIDs);this._dialog.wcfDialog("close"),this._notification.show()}}),WCF.Conversation.Label.Manager=Class.extend({_deletedLabelID:0,_dialog:null,_labels:null,_link:"",_notification:"",_proxy:null,_maxLabels:0,_labelCount:0,init:function(e){this._deletedLabelID=0,this._maxLabels=0,this._labelCount=0,this._link=e,this._labels=WCF.Dropdown.getDropdownMenu("conversationLabelFilter").children(".scrollableDropdownMenu"),$("#manageLabel").click($.proxy(this._click,this)),this._notification=new WCF.System.Notification(WCF.Language.get("wcf.conversation.label.management.addLabel.success")),this._proxy=new WCF.Action.Proxy({success:$.proxy(this._success,this)})},_click:function(){this._proxy.setOption("data",{actionName:"getLabelManagement",className:"wcf\\data\\conversation\\ConversationAction"}),this._proxy.sendRequest()},_success:function(e,a,t){if(null===this._dialog&&(this._dialog=$('<div id="labelManagement" />').hide().appendTo(document.body)),e.returnValues&&e.returnValues.actionName)switch(e.returnValues.actionName){case"add":this._insertLabel(e);break;case"getLabelManagement":this._maxLabels=parseInt(e.returnValues.maxLabels),this._labelCount=parseInt(e.returnValues.labelCount),this._dialog.empty().html(e.returnValues.template),this._dialog.wcfDialog({title:WCF.Language.get("wcf.conversation.label.management")}),this._dialog.wcfDialog("render"),this._bindListener()}else if(this._deletedLabelID){var n=new RegExp("(\\?|&)labelID="+this._deletedLabelID);window.location=window.location.toString().replace(n,"")}else window.location.reload()},_insertLabel:function(e){var a=$('<li><a href="'+this._link+"&labelID="+e.returnValues.labelID+'"><span class="badge label'+(e.returnValues.cssClassName?" "+e.returnValues.cssClassName:"")+'">'+e.returnValues.label+"</span></a></li>");a.find("a > span").data("labelID",e.returnValues.labelID).data("cssClassName",e.returnValues.cssClassName),this._labels.append(a),this._notification.show(),this._labelCount++,this._labelCount>=this._maxLabels&&$("#conversationLabelManagementForm").hide()},_bindListener:function(){$("#labelName").on("keyup keydown keypress",$.proxy(this._updateLabels,this)),$.browser.mozilla&&$.browser.touch&&$("#labelName").on("input",$.proxy(this._updateLabels,this)),this._labelCount>=this._maxLabels&&($("#conversationLabelManagementForm").hide(),this._dialog.wcfDialog("render")),$("#addLabel").disable().click($.proxy(this._addLabel,this)),$("#editLabel").disable(),this._dialog.find(".conversationLabelList a.label").click($.proxy(this._edit,this))},_edit:function(e){var a,t,n;this._labelCount>=this._maxLabels&&($("#conversationLabelManagementForm").show(),this._dialog.wcfDialog("render")),a=$(e.currentTarget),t=WCF.Language.get("wcf.conversation.label.management.editLabel").replace(/#labelName#/,WCF.String.escapeHTML(a.text())),$("#conversationLabelManagementForm").data("labelID",a.data("labelID")).children(".sectionTitle").html(t),$("#labelName").val(a.text()).trigger("keyup"),n=a.data("cssClassName"),$("#labelManagementList input").each((function(e,a){var t=$(a);t.val()==n&&t.attr("checked","checked")})),$("#addLabel").hide(),$("#editLabel").show().click($.proxy(this._editLabel,this)),$("#deleteLabel").show().click($.proxy(this._deleteLabel,this))},_editLabel:function(){this._proxy.setOption("data",{actionName:"update",className:"wcf\\data\\conversation\\label\\ConversationLabelAction",objectIDs:[$("#conversationLabelManagementForm").data("labelID")],parameters:{data:{cssClassName:$("#labelManagementList input:checked").val(),label:$("#labelName").val()}}}),this._proxy.sendRequest()},_deleteLabel:function(){var e=WCF.Language.get("wcf.conversation.label.management.deleteLabel.confirmMessage").replace(/#labelName#/,$("#labelName").val());WCF.System.Confirmation.show(e,$.proxy((function(e){"confirm"===e&&(this._proxy.setOption("data",{actionName:"delete",className:"wcf\\data\\conversation\\label\\ConversationLabelAction",objectIDs:[$("#conversationLabelManagementForm").data("labelID")]}),this._proxy.sendRequest(),this._deletedLabelID=$("#conversationLabelManagementForm").data("labelID"))}),this),void 0,void 0,!0)},_updateLabels:function(){var e=$.trim($("#labelName").val());e?$("#addLabel, #editLabel").enable():($("#addLabel, #editLabel").disable(),e=WCF.Language.get("wcf.conversation.label.placeholder")),$("#labelManagementList").find("span.label").text(e)},_addLabel:function(){var e=$("#labelName").val(),a=$("#labelManagementList input:checked").val();this._proxy.setOption("data",{actionName:"add",className:"wcf\\data\\conversation\\label\\ConversationLabelAction",parameters:{data:{cssClassName:a,labelName:e}}}),this._proxy.sendRequest(),this._dialog.wcfDialog("close")}}),WCF.Conversation.Message={},WCF.Conversation.Message.InlineEditor=WCF.Message.InlineEditor.extend({init:function(e,a){this._super(e,!0,a)},_getClassName:function(){return"wcf\\data\\conversation\\message\\ConversationMessageAction"}});
\ No newline at end of file
diff --git a/files/js/WCF.Conversation.tiny.min.js b/files/js/WCF.Conversation.tiny.min.js
deleted file mode 100644
index 7c3254f0..00000000
--- a/files/js/WCF.Conversation.tiny.min.js
+++ /dev/null
@@ -1 +0,0 @@
-WCF.Conversation={},WCF.Conversation.EditorHandler=Class.extend({_attributes:{},_conversations:{},_permissions:{},init:function(availableLabels){this._conversations={};var self=this;$(".conversation").each((function(index,conversation){var $labelIDs,$conversation=$(conversation),$conversationID=$conversation.data("conversationID");self._conversations[$conversationID]||(self._conversations[$conversationID]=$conversation,$labelIDs=eval($conversation.data("labelIDs")),self._attributes[$conversationID]={isClosed:!!$conversation.data("isClosed"),labelIDs:$labelIDs},self._permissions[$conversationID]={canAddParticipants:!!$conversation.data("canAddParticipants"),canCloseConversation:!!$conversation.data("canCloseConversation")})}))},getPermission:function(e,a){return void 0!==this._permissions[e][a]&&!!this._permissions[e][a]},getValue:function(e,a){switch(a){case"labelIDs":return void 0===this._attributes[e].labelIDs&&(this._attributes[e].labelIDs=[]),this._attributes[e].labelIDs;case"isClosed":return!!this._attributes[e].isClosed}},countAvailableLabels:function(){return this.getAvailableLabels().length},getAvailableLabels:function(){var e=[];return WCF.Dropdown.getDropdownMenu("conversationLabelFilter").children(".scrollableDropdownMenu").children("li").each((function(a,t){var n,s=$(t);if(s.hasClass("dropdownDivider"))return!1;n=s.find("span"),e.push({cssClassName:n.data("cssClassName"),labelID:n.data("labelID"),label:n.text()})})),e},update:function(e,a,t){var n,s,i,o,l,r;if(this._conversations[e]){switch(n=this._conversations[e],a){case"close":$(`<li>\n\t\t\t\t\t<span class="jsTooltip jsIconLock" title="${WCF.Language.get("wcf.global.state.closed")}">\n\t\t\t\t\t\t<fa-icon size="16" name="lock"></fa-icon>\n\t\t\t\t\t</span>\n\t\t\t\t</li>`).prependTo(n.find(".statusIcons")),this._attributes[e].isClosed=1;break;case"labelIDs":if(s={},WCF.Dropdown.getDropdownMenu("conversationLabelFilter").find("li > a > span").each((function(e,a){var t=$(a);s[t.data("labelID")]={cssClassName:t.data("cssClassName"),label:t.text(),url:t.parent().attr("href")}})),i=n.find(".columnSubject > .labelList"),t.length)for(i.length||(i=$('<ul class="labelList" />').prependTo(n.find(".columnSubject"))),i.empty(),o=0,l=t.length;o<l;o++)r=s[t[o]],$('<li><a href="'+r.url+'" class="badge label'+(r.cssClassName?" "+r.cssClassName:"")+'">'+WCF.String.escapeHTML(r.label)+"</a></li>").appendTo(i);else i.length&&i.remove();break;case"open":n.find(".statusIcons li").each((function(e,a){var t=$(a);if(t.children("span.jsIconLock").length)return t.remove(),!1})),this._attributes[e].isClosed=0}WCF.Clipboard.reload()}else console.debug("[WCF.Conversation.EditorHandler] Unknown conversation id '"+e+"'")}}),WCF.Conversation.EditorHandlerConversation=WCF.Conversation.EditorHandler.extend({_availableLabels:null,init:function(e){this._availableLabels=e||[],this._super()},getAvailableLabels:function(){return this._availableLabels},update:function(e,a,t){var n,s,i,o;if(this._conversations[e])switch(n=$(".contentHeaderTitle > .contentHeaderMetaData"),a){case"close":$(`<li>\n\t\t\t\t\t<fa-icon size="16" name="lock"></fa-icon>\n\t\t\t\t\t${WCF.Language.get("wcf.global.state.closed")}\n\t\t\t\t</li>`).appendTo(n),this._attributes[e].isClosed=1;break;case"labelIDs":s=n.find(".labelList"),t.length?(i=this.getAvailableLabels(),s.length||(s=(s=$('<li>\n\t\t\t\t\t\t\t<fa-icon size="16" name="tags"></fa-icon>\n\t\t\t\t\t\t\t<ul class="labelList"></ul>\n\t\t\t\t\t\t</li>').prependTo(n)).children("ul")),o="",t.forEach((function(e){i.forEach((function(a){a.labelID==e&&(o+='<li><span class="label badge'+(a.cssClassName?" "+a.cssClassName:"")+'">'+a.label+"</span></li>")}))})),s[0].innerHTML=o):s.parent().remove();break;case"open":n.find(".jsIconLock").parent().remove(),this._attributes[e].isClosed=0}else console.debug("[WCF.Conversation.EditorHandler] Unknown conversation id '"+e+"'")}}),WCF.Conversation.Clipboard=Class.extend({_editorHandler:null,init:function(e){this._editorHandler=e,WCF.System.Event.addListener("com.woltlab.wcf.clipboard","com.woltlab.wcf.conversation.conversation",function(e){null===e.responseData?this._execute(e.data.actionName,e.data.parameters):this._evaluateResponse(e.data.actionName,e.responseData)}.bind(this))},_execute:function(e,a){"com.woltlab.wcf.conversation.conversation.assignLabel"===e&&new WCF.Conversation.Label.Editor(this._editorHandler,null,a.objectIDs)},_evaluateResponse:function(e,a){var t,n;switch(e){case"com.woltlab.wcf.conversation.conversation.leave":case"com.woltlab.wcf.conversation.conversation.leavePermanently":case"com.woltlab.wcf.conversation.conversation.markAsRead":case"com.woltlab.wcf.conversation.conversation.restore":window.location.reload();break;case"com.woltlab.wcf.conversation.conversation.close":case"com.woltlab.wcf.conversation.conversation.open":for(t in a.returnValues.conversationData)a.returnValues.conversationData.hasOwnProperty(t)&&(n=a.returnValues.conversationData[t],this._editorHandler.update(t,n.isClosed?"close":"open",n))}}}),WCF.Conversation.InlineEditor=WCF.InlineEditor.extend({_editorHandler:null,_environment:"conversation",_setOptions:function(){this._options=[{label:WCF.Language.get("wcf.conversation.edit.subject"),optionName:"editSubject"},{label:WCF.Language.get("wcf.conversation.edit.close"),optionName:"close"},{label:WCF.Language.get("wcf.conversation.edit.open"),optionName:"open"},{label:WCF.Language.get("wcf.conversation.edit.assignLabel"),optionName:"assignLabel"},{optionName:"divider"},{label:WCF.Language.get("wcf.conversation.edit.addParticipants"),optionName:"addParticipants"},{label:WCF.Language.get("wcf.conversation.edit.leave"),optionName:"leave"},{label:WCF.Language.get("wcf.global.button.edit"),optionName:"edit",isQuickOption:!0}]},setEditorHandler:function(e,a){this._editorHandler=e,this._environment="list"==a?"list":"conversation"},_getTriggerElement:function(e){return e.find(".jsConversationInlineEditor")},_validate:function(e,a){var t=$("#"+e).data("conversationID");switch(a){case"addParticipants":return this._editorHandler.getPermission(t,"canAddParticipants");case"assignLabel":return!!this._editorHandler.countAvailableLabels();case"editSubject":return!!this._editorHandler.getPermission(t,"canCloseConversation");case"close":case"open":return!!this._editorHandler.getPermission(t,"canCloseConversation")&&("close"===a?!this._editorHandler.getValue(t,"isClosed"):this._editorHandler.getValue(t,"isClosed"));case"leave":return!0;case"edit":return!!$("#"+e).data("isDraft")}return!1},_execute:function(e,a){if(!this._validate(e,a))return!1;switch(a){case"addParticipants":require(["WoltLabSuite/Core/Conversation/Ui/Participant/Add"],(function(a){new a(elData(elById(e),"conversation-id"))}));break;case"assignLabel":new WCF.Conversation.Label.Editor(this._editorHandler,e);break;case"editSubject":require(["WoltLabSuite/Core/Conversation/Ui/Subject/Editor"],(function(a){a.beginEdit(elData(elById(e),"conversation-id"))}));break;case"close":case"open":this._updateConversation(e,a,{isClosed:"close"===a?1:0});break;case"leave":new WCF.Conversation.Leave([$("#"+e).data("conversationID")],this._environment);break;case"edit":window.location=this._getTriggerElement($("#"+e)).prop("href")}},_updateConversation:function(e,a,t){var n=this._elements[e].data("conversationID");switch(a){case"close":case"editSubject":case"open":this._updateData.push({elementID:e,optionName:a,data:t}),this._proxy.setOption("data",{actionName:a,className:"wcf\\data\\conversation\\ConversationAction",objectIDs:[n]}),this._proxy.sendRequest()}},_updateState:function(){var e,a,t,n;for(e=0,a=this._updateData.length;e<a;e++)switch(t=this._updateData[e],n=this._elements[t.elementID].data("conversationID"),t.optionName){case"close":case"editSubject":case"open":this._editorHandler.update(n,t.optionName,t.data)}}}),WCF.Conversation.Leave=Class.extend({_conversationIDs:[],_dialog:null,_environment:"",_proxy:null,init:function(e,a){this._conversationIDs=e,this._dialog=null,this._environment=a,this._proxy=new WCF.Action.Proxy({success:$.proxy(this._success,this)}),this._loadDialog()},_loadDialog:function(){this._proxy.setOption("data",{actionName:"getLeaveForm",className:"wcf\\data\\conversation\\ConversationAction",objectIDs:this._conversationIDs}),this._proxy.sendRequest()},_success:function(e,a,t){switch(e.returnValues.actionName){case"getLeaveForm":this._showDialog(e);break;case"hideConversation":"conversation"===this._environment?window.location=e.returnValues.redirectURL:window.location.reload()}},_showDialog:function(e){null===this._dialog&&(this._dialog=$("#leaveDialog"),this._dialog.length||(this._dialog=$('<div id="leaveDialog" />').hide().appendTo(document.body))),this._dialog.html(e.returnValues.template),this._dialog.wcfDialog({title:WCF.Language.get("wcf.conversation.leave.title")}),this._dialog.wcfDialog("render"),this._dialog.find("#hideConversation").click($.proxy(this._click,this))},_click:function(){var e=this._dialog.find("input[type=radio]:checked");1===e.length&&(this._proxy.setOption("data",{actionName:"hideConversation",className:"wcf\\data\\conversation\\ConversationAction",objectIDs:this._conversationIDs,parameters:{hideConversation:e.val()}}),this._proxy.sendRequest())}}),WCF.Conversation.Label={},WCF.Conversation.Label.Editor=Class.extend({_conversationIDs:0,_dialog:null,_editorHandler:null,_notification:null,_proxy:null,init:function(e,a,t){this._conversationIDs=a?[$("#"+a).data("conversationID")]:t,this._dialog=null,this._editorHandler=e,this._notification=new WCF.System.Notification(WCF.Language.get("wcf.global.success.edit")),this._proxy=new WCF.Action.Proxy({success:$.proxy(this._success,this)}),this._loadDialog()},_loadDialog:function(){this._proxy.setOption("data",{actionName:"getLabelForm",className:"wcf\\data\\conversation\\label\\ConversationLabelAction",parameters:{conversationIDs:this._conversationIDs}}),this._proxy.sendRequest()},_success:function(e,a,t){switch(e.returnValues.actionName){case"assignLabel":this._assignLabels(e);break;case"getLabelForm":this._renderDialog(e)}},_renderDialog:function(e){null===this._dialog&&(this._dialog=$("#conversationLabelForm"),this._dialog.length||(this._dialog=$('<div id="conversationLabelForm" />').hide().appendTo(document.body))),this._dialog.html(e.returnValues.template),this._dialog.wcfDialog({title:WCF.Language.get("wcf.conversation.label.assignLabels")}),this._dialog.wcfDialog("render"),$("#assignLabels").click($.proxy(this._save,this))},_save:function(){var e=[];this._dialog.find("input").each((function(a,t){var n=$(t);n.is(":checked")&&e.push(n.data("labelID"))})),this._proxy.setOption("data",{actionName:"assignLabel",className:"wcf\\data\\conversation\\label\\ConversationLabelAction",parameters:{conversationIDs:this._conversationIDs,labelIDs:e}}),this._proxy.sendRequest()},_assignLabels:function(e){for(var a=0,t=this._conversationIDs.length;a<t;a++)this._editorHandler.update(this._conversationIDs[a],"labelIDs",e.returnValues.labelIDs);this._dialog.wcfDialog("close"),this._notification.show()}}),WCF.Conversation.Label.Manager=Class.extend({_deletedLabelID:0,_dialog:null,_labels:null,_link:"",_notification:"",_proxy:null,_maxLabels:0,_labelCount:0,init:function(e){this._deletedLabelID=0,this._maxLabels=0,this._labelCount=0,this._link=e,this._labels=WCF.Dropdown.getDropdownMenu("conversationLabelFilter").children(".scrollableDropdownMenu"),$("#manageLabel").click($.proxy(this._click,this)),this._notification=new WCF.System.Notification(WCF.Language.get("wcf.conversation.label.management.addLabel.success")),this._proxy=new WCF.Action.Proxy({success:$.proxy(this._success,this)})},_click:function(){this._proxy.setOption("data",{actionName:"getLabelManagement",className:"wcf\\data\\conversation\\ConversationAction"}),this._proxy.sendRequest()},_success:function(e,a,t){if(null===this._dialog&&(this._dialog=$('<div id="labelManagement" />').hide().appendTo(document.body)),e.returnValues&&e.returnValues.actionName)switch(e.returnValues.actionName){case"add":this._insertLabel(e);break;case"getLabelManagement":this._maxLabels=parseInt(e.returnValues.maxLabels),this._labelCount=parseInt(e.returnValues.labelCount),this._dialog.empty().html(e.returnValues.template),this._dialog.wcfDialog({title:WCF.Language.get("wcf.conversation.label.management")}),this._dialog.wcfDialog("render"),this._bindListener()}else if(this._deletedLabelID){var n=new RegExp("(\\?|&)labelID="+this._deletedLabelID);window.location=window.location.toString().replace(n,"")}else window.location.reload()},_insertLabel:function(e){var a=$('<li><a href="'+this._link+"&labelID="+e.returnValues.labelID+'"><span class="badge label'+(e.returnValues.cssClassName?" "+e.returnValues.cssClassName:"")+'">'+e.returnValues.label+"</span></a></li>");a.find("a > span").data("labelID",e.returnValues.labelID).data("cssClassName",e.returnValues.cssClassName),this._labels.append(a),this._notification.show(),this._labelCount++,this._labelCount>=this._maxLabels&&$("#conversationLabelManagementForm").hide()},_bindListener:function(){$("#labelName").on("keyup keydown keypress",$.proxy(this._updateLabels,this)),$.browser.mozilla&&$.browser.touch&&$("#labelName").on("input",$.proxy(this._updateLabels,this)),this._labelCount>=this._maxLabels&&($("#conversationLabelManagementForm").hide(),this._dialog.wcfDialog("render")),$("#addLabel").disable().click($.proxy(this._addLabel,this)),$("#editLabel").disable(),this._dialog.find(".conversationLabelList a.label").click($.proxy(this._edit,this))},_edit:function(e){var a,t,n;this._labelCount>=this._maxLabels&&($("#conversationLabelManagementForm").show(),this._dialog.wcfDialog("render")),a=$(e.currentTarget),t=WCF.Language.get("wcf.conversation.label.management.editLabel").replace(/#labelName#/,WCF.String.escapeHTML(a.text())),$("#conversationLabelManagementForm").data("labelID",a.data("labelID")).children(".sectionTitle").html(t),$("#labelName").val(a.text()).trigger("keyup"),n=a.data("cssClassName"),$("#labelManagementList input").each((function(e,a){var t=$(a);t.val()==n&&t.attr("checked","checked")})),$("#addLabel").hide(),$("#editLabel").show().click($.proxy(this._editLabel,this)),$("#deleteLabel").show().click($.proxy(this._deleteLabel,this))},_editLabel:function(){this._proxy.setOption("data",{actionName:"update",className:"wcf\\data\\conversation\\label\\ConversationLabelAction",objectIDs:[$("#conversationLabelManagementForm").data("labelID")],parameters:{data:{cssClassName:$("#labelManagementList input:checked").val(),label:$("#labelName").val()}}}),this._proxy.sendRequest()},_deleteLabel:function(){var e=WCF.Language.get("wcf.conversation.label.management.deleteLabel.confirmMessage").replace(/#labelName#/,$("#labelName").val());WCF.System.Confirmation.show(e,$.proxy((function(e){"confirm"===e&&(this._proxy.setOption("data",{actionName:"delete",className:"wcf\\data\\conversation\\label\\ConversationLabelAction",objectIDs:[$("#conversationLabelManagementForm").data("labelID")]}),this._proxy.sendRequest(),this._deletedLabelID=$("#conversationLabelManagementForm").data("labelID"))}),this),void 0,void 0,!0)},_updateLabels:function(){var e=$.trim($("#labelName").val());e?$("#addLabel, #editLabel").enable():($("#addLabel, #editLabel").disable(),e=WCF.Language.get("wcf.conversation.label.placeholder")),$("#labelManagementList").find("span.label").text(e)},_addLabel:function(){var e=$("#labelName").val(),a=$("#labelManagementList input:checked").val();this._proxy.setOption("data",{actionName:"add",className:"wcf\\data\\conversation\\label\\ConversationLabelAction",parameters:{data:{cssClassName:a,labelName:e}}}),this._proxy.sendRequest(),this._dialog.wcfDialog("close")}}),WCF.Conversation.Message={},WCF.Conversation.Message.InlineEditor=WCF.Message.InlineEditor.extend({init:function(e,a){this._super(e,!0,a)},_getClassName:function(){return"wcf\\data\\conversation\\message\\ConversationMessageAction"}});
\ No newline at end of file
diff --git a/files/js/WoltLabSuite/Core/Api/Conversations/AssignConversationLabels.js b/files/js/WoltLabSuite/Core/Api/Conversations/AssignConversationLabels.js
deleted file mode 100644
index cd2b86fd..00000000
--- a/files/js/WoltLabSuite/Core/Api/Conversations/AssignConversationLabels.js
+++ /dev/null
@@ -1,27 +0,0 @@
-/**
- * Assign the labels for the given conversations.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-define(["require", "exports", "WoltLabSuite/Core/Ajax/Backend", "WoltLabSuite/Core/Api/Result"], function (require, exports, Backend_1, Result_1) {
-    "use strict";
-    Object.defineProperty(exports, "__esModule", { value: true });
-    exports.assignConversationLabels = assignConversationLabels;
-    async function assignConversationLabels(conversationIDs, labelIDs) {
-        try {
-            await (0, Backend_1.prepareRequest)(`${window.WSC_RPC_API_URL}core/conversations/assign-labels`)
-                .post({
-                conversationIDs: conversationIDs,
-                labelIDs: labelIDs,
-            })
-                .fetchAsJson();
-        }
-        catch (e) {
-            return (0, Result_1.apiResultFromError)(e);
-        }
-        return (0, Result_1.apiResultFromValue)([]);
-    }
-});
diff --git a/files/js/WoltLabSuite/Core/Api/Conversations/GetConversationLabelManager.js b/files/js/WoltLabSuite/Core/Api/Conversations/GetConversationLabelManager.js
deleted file mode 100644
index 52322661..00000000
--- a/files/js/WoltLabSuite/Core/Api/Conversations/GetConversationLabelManager.js
+++ /dev/null
@@ -1,25 +0,0 @@
-/**
- * Gets the data for the conversation label manager.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-define(["require", "exports", "WoltLabSuite/Core/Ajax/Backend", "WoltLabSuite/Core/Api/Result"], function (require, exports, Backend_1, Result_1) {
-    "use strict";
-    Object.defineProperty(exports, "__esModule", { value: true });
-    exports.getConversationLabelManager = getConversationLabelManager;
-    async function getConversationLabelManager() {
-        let response;
-        try {
-            response = (await (0, Backend_1.prepareRequest)(`${window.WSC_RPC_API_URL}core/conversations/label-manager`)
-                .get()
-                .fetchAsJson());
-        }
-        catch (e) {
-            return (0, Result_1.apiResultFromError)(e);
-        }
-        return (0, Result_1.apiResultFromValue)(response);
-    }
-});
diff --git a/files/js/WoltLabSuite/Core/Api/Conversations/GetConversationLabels.js b/files/js/WoltLabSuite/Core/Api/Conversations/GetConversationLabels.js
deleted file mode 100644
index 5fe51b6b..00000000
--- a/files/js/WoltLabSuite/Core/Api/Conversations/GetConversationLabels.js
+++ /dev/null
@@ -1,27 +0,0 @@
-/**
- * Gets the form data to assign labels to conversations.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-define(["require", "exports", "WoltLabSuite/Core/Ajax/Backend", "WoltLabSuite/Core/Api/Result"], function (require, exports, Backend_1, Result_1) {
-    "use strict";
-    Object.defineProperty(exports, "__esModule", { value: true });
-    exports.getConversationLabels = getConversationLabels;
-    async function getConversationLabels(conversationIDs) {
-        const url = new URL(`${window.WSC_RPC_API_URL}core/conversations/labels`);
-        for (const conversationID of conversationIDs) {
-            url.searchParams.append("conversationIDs[]", conversationID.toString());
-        }
-        let response;
-        try {
-            response = (await (0, Backend_1.prepareRequest)(url).get().fetchAsJson());
-        }
-        catch (e) {
-            return (0, Result_1.apiResultFromError)(e);
-        }
-        return (0, Result_1.apiResultFromValue)(response);
-    }
-});
diff --git a/files/js/WoltLabSuite/Core/Api/Conversations/LeaveConversation.js b/files/js/WoltLabSuite/Core/Api/Conversations/LeaveConversation.js
deleted file mode 100644
index 8aafab4f..00000000
--- a/files/js/WoltLabSuite/Core/Api/Conversations/LeaveConversation.js
+++ /dev/null
@@ -1,27 +0,0 @@
-/**
- * Leaves a conversation.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-define(["require", "exports", "WoltLabSuite/Core/Ajax/Backend", "WoltLabSuite/Core/Api/Result"], function (require, exports, Backend_1, Result_1) {
-    "use strict";
-    Object.defineProperty(exports, "__esModule", { value: true });
-    exports.leaveConversation = leaveConversation;
-    async function leaveConversation(conversationId, hideConversation) {
-        let response;
-        try {
-            response = (await (0, Backend_1.prepareRequest)(`${window.WSC_RPC_API_URL}core/conversations/${conversationId}/leave`)
-                .post({
-                hideConversation,
-            })
-                .fetchAsJson());
-        }
-        catch (e) {
-            return (0, Result_1.apiResultFromError)(e);
-        }
-        return (0, Result_1.apiResultFromValue)(response.redirectUrl);
-    }
-});
diff --git a/files/js/WoltLabSuite/Core/Conversation/Bootstrap.js b/files/js/WoltLabSuite/Core/Conversation/Bootstrap.js
index b65b2465..3f7fbc12 100644
--- a/files/js/WoltLabSuite/Core/Conversation/Bootstrap.js
+++ b/files/js/WoltLabSuite/Core/Conversation/Bootstrap.js
@@ -55,6 +55,11 @@ define(["require", "exports", "WoltLabSuite/Core/LazyLoader", "../Api/Conversati
                 });
             });
         });
+        (0, LazyLoader_1.whenFirstSeen)(".conversationRemoveParticipant", () => {
+            void new Promise((resolve_2, reject_2) => { require(["../Component/Conversation/RemoveParticipant"], resolve_2, reject_2); }).then(__importStar).then(({ setup }) => {
+                setup();
+            });
+        });
     }
     function setup() {
         setupPopover();
diff --git a/files/js/WoltLabSuite/Core/Conversation/Clipboard.js b/files/js/WoltLabSuite/Core/Conversation/Clipboard.js
deleted file mode 100644
index 933e8f9f..00000000
--- a/files/js/WoltLabSuite/Core/Conversation/Clipboard.js
+++ /dev/null
@@ -1,44 +0,0 @@
-/**
- * Clipboard for conversations.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-define(["require", "exports", "WoltLabSuite/Core/Event/Handler", "./Component/Label/Editor", "./Component/EditorHandler"], function (require, exports, Handler_1, Editor_1, EditorHandler_1) {
-    "use strict";
-    Object.defineProperty(exports, "__esModule", { value: true });
-    exports.setup = setup;
-    function setup() {
-        (0, Handler_1.add)("com.woltlab.wcf.clipboard", "com.woltlab.wcf.conversation.conversation", (data) => {
-            if (data.responseData === null) {
-                execute(data.data.actionName, data.data.parameters);
-            }
-            else {
-                evaluateResponse(data.data.actionName, data.responseData);
-            }
-        });
-    }
-    function execute(actionName, parameters) {
-        if (actionName === "com.woltlab.wcf.conversation.conversation.assignLabel") {
-            void (0, Editor_1.openDialog)(parameters.objectIDs);
-        }
-    }
-    function evaluateResponse(actionName, data) {
-        switch (actionName) {
-            case "com.woltlab.wcf.conversation.conversation.leave":
-            case "com.woltlab.wcf.conversation.conversation.leavePermanently":
-            case "com.woltlab.wcf.conversation.conversation.markAsRead":
-            case "com.woltlab.wcf.conversation.conversation.restore":
-                window.location.reload();
-                break;
-            case "com.woltlab.wcf.conversation.conversation.close":
-            case "com.woltlab.wcf.conversation.conversation.open":
-                Object.entries(data.returnValues.conversationData).forEach(([conversationId, conversationData]) => {
-                    (0, EditorHandler_1.getConversationEditor)(parseInt(conversationId)).isClosed = conversationData.isClosed;
-                });
-                break;
-        }
-    }
-});
diff --git a/files/js/WoltLabSuite/Core/Conversation/Component/EditorHandler.js b/files/js/WoltLabSuite/Core/Conversation/Component/EditorHandler.js
deleted file mode 100644
index 4283ed1a..00000000
--- a/files/js/WoltLabSuite/Core/Conversation/Component/EditorHandler.js
+++ /dev/null
@@ -1,119 +0,0 @@
-/**
- * Handles editing for conversations.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-define(["require", "exports", "WoltLabSuite/Core/Helper/Selector", "WoltLabSuite/Core/Language", "WoltLabSuite/Core/StringUtil", "WoltLabSuite/Core/Controller/Clipboard"], function (require, exports, Selector_1, Language_1, StringUtil_1, Clipboard_1) {
-    "use strict";
-    Object.defineProperty(exports, "__esModule", { value: true });
-    exports.getAvailableLabels = getAvailableLabels;
-    exports.addAvailableLabel = addAvailableLabel;
-    exports.getLabel = getLabel;
-    exports.getConversationEditor = getConversationEditor;
-    exports.setup = setup;
-    const _availableLabels = new Map();
-    const conversations = new Map();
-    class ConversationEditor {
-        #conversation;
-        #isClosed;
-        #canAddParticipants;
-        #canCloseConversation;
-        #labelIDs;
-        #isConversationListItem;
-        constructor(conversation) {
-            this.#conversation = conversation;
-            this.#isConversationListItem = conversation.classList.contains("jsClipboardObject");
-            this.#isClosed = conversation.dataset.isClosed === "1";
-            this.#canAddParticipants = conversation.dataset.canAddParticipants === "1";
-            this.#canCloseConversation = conversation.dataset.canCloseConversation === "1";
-            this.#labelIDs = JSON.parse(conversation.dataset.labelIds);
-        }
-        get isClosed() {
-            return this.#isClosed;
-        }
-        set isClosed(isClosed) {
-            this.#isClosed = isClosed;
-            this.#conversation.dataset.isClosed = isClosed ? "1" : "0";
-            if (isClosed) {
-                this.#getContainer(".statusIcons")?.insertAdjacentHTML("beforeend", `<li>
-  <span class="jsTooltip jsIconLock" title="${(0, Language_1.getPhrase)("wcf.global.state.closed")}">
-    <fa-icon size="16" name="lock"></fa-icon>
-  </span>
-</li>`);
-            }
-            else {
-                this.#getContainer(".statusIcons").querySelector("li .jsIconLock")?.parentElement?.remove();
-            }
-            (0, Clipboard_1.reload)();
-        }
-        get canAddParticipants() {
-            return this.#canAddParticipants;
-        }
-        get canCloseConversation() {
-            return this.#canCloseConversation;
-        }
-        get labelIDs() {
-            return this.#labelIDs;
-        }
-        set labelIDs(labelIDs) {
-            this.#labelIDs = labelIDs;
-            this.#conversation.dataset.labelIDs = JSON.stringify(labelIDs);
-            const labels = labelIDs.map((labelID) => {
-                return getLabel(labelID);
-            });
-            let labelList = this.#getContainer(".columnSubject > .labelList");
-            if (labelIDs.length == 0) {
-                labelList?.remove();
-            }
-            else {
-                if (!labelList) {
-                    labelList = document.createElement("ul");
-                    labelList.classList.add("labelList");
-                    this.#getContainer(".columnSubject")?.insertAdjacentElement("afterbegin", labelList);
-                }
-                // remove old labels
-                labelList.innerHTML = "";
-                for (const label of labels) {
-                    if (this.#isConversationListItem) {
-                        labelList.insertAdjacentHTML("beforeend", `<li><a href="${(0, StringUtil_1.escapeHTML)(label.url)}" class="badge label ${label.cssClassName}">${(0, StringUtil_1.escapeHTML)(label.label)}</a></li>`);
-                    }
-                    else {
-                        labelList.insertAdjacentHTML("beforeend", `<li><span class="badge label ${label.cssClassName}">${(0, StringUtil_1.escapeHTML)(label.label)}</span></li>`);
-                    }
-                }
-            }
-            (0, Clipboard_1.reload)();
-        }
-        #getContainer(selector) {
-            if (this.#isConversationListItem) {
-                return this.#conversation.querySelector(selector);
-            }
-            else {
-                return document.querySelector(".contentHeaderTitle > .contentHeaderMetaData");
-            }
-        }
-    }
-    function getAvailableLabels() {
-        return Array.from(_availableLabels.values());
-    }
-    function addAvailableLabel(label) {
-        _availableLabels.set(label.labelID, label);
-    }
-    function getLabel(labelID) {
-        return _availableLabels.get(labelID);
-    }
-    function getConversationEditor(conversationID) {
-        return conversations.get(conversationID);
-    }
-    function setup(availableLabels) {
-        availableLabels.forEach((label) => {
-            _availableLabels.set(label.labelID, label);
-        });
-        (0, Selector_1.wheneverFirstSeen)(".conversation", (conversation) => {
-            conversations.set(parseInt(conversation.dataset.conversationId), new ConversationEditor(conversation));
-        });
-    }
-});
diff --git a/files/js/WoltLabSuite/Core/Conversation/Component/Label/Editor.js b/files/js/WoltLabSuite/Core/Conversation/Component/Label/Editor.js
deleted file mode 100644
index b8889a30..00000000
--- a/files/js/WoltLabSuite/Core/Conversation/Component/Label/Editor.js
+++ /dev/null
@@ -1,44 +0,0 @@
-/**
- * Editor to assign labels to conversations.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-define(["require", "exports", "tslib", "WoltLabSuite/Core/Component/Dialog", "../../../Api/Conversations/GetConversationLabels", "WoltLabSuite/Core/Form/Builder/Manager", "../../../Api/Conversations/AssignConversationLabels", "WoltLabSuite/Core/Controller/Clipboard", "WoltLabSuite/Core/Component/Snackbar", "../EditorHandler"], function (require, exports, tslib_1, Dialog_1, GetConversationLabels_1, FormBuilderManager, AssignConversationLabels_1, Clipboard_1, Snackbar_1, EditorHandler_1) {
-    "use strict";
-    Object.defineProperty(exports, "__esModule", { value: true });
-    exports.openDialog = openDialog;
-    FormBuilderManager = tslib_1.__importStar(FormBuilderManager);
-    async function openDialog(conversationIDs) {
-        const response = await (0, GetConversationLabels_1.getConversationLabels)(conversationIDs);
-        if (!response.ok) {
-            throw new Error("Failed to load form to assign labels to conversations.");
-        }
-        const dialog = (0, Dialog_1.dialogFactory)().fromHtml(response.value.template).asPrompt();
-        dialog.addEventListener("afterClose", () => {
-            if (FormBuilderManager.hasForm(response.value.formId)) {
-                FormBuilderManager.unregisterForm(response.value.formId);
-            }
-        });
-        dialog.addEventListener("primary", () => {
-            void FormBuilderManager.getData(response.value.formId).then(async (data) => {
-                const labelIDs = [];
-                for (const labelID of data["conversationLabel_labelIDs"]) {
-                    labelIDs.push(parseInt(labelID));
-                }
-                await (0, AssignConversationLabels_1.assignConversationLabels)(conversationIDs, labelIDs);
-                assignLabels(conversationIDs, labelIDs);
-                (0, Clipboard_1.reload)();
-            });
-        });
-        dialog.show(response.value.title);
-    }
-    function assignLabels(conversationIDs, labelIDs) {
-        conversationIDs.forEach((conversationID) => {
-            (0, EditorHandler_1.getConversationEditor)(conversationID).labelIDs = labelIDs;
-        });
-        (0, Snackbar_1.showDefaultSuccessSnackbar)();
-    }
-});
diff --git a/files/js/WoltLabSuite/Core/Conversation/Component/Label/Manager.js b/files/js/WoltLabSuite/Core/Conversation/Component/Label/Manager.js
deleted file mode 100644
index fcdeddb6..00000000
--- a/files/js/WoltLabSuite/Core/Conversation/Component/Label/Manager.js
+++ /dev/null
@@ -1,108 +0,0 @@
-/**
- * Managed the labels of a conversation.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-define(["require", "exports", "tslib", "../../../Api/Conversations/GetConversationLabelManager", "WoltLabSuite/Core/Helper/PromiseMutex", "WoltLabSuite/Core/Component/Dialog", "WoltLabSuite/Core/Language", "WoltLabSuite/Core/Component/Snackbar", "WoltLabSuite/Core/Ui/Dropdown/Simple", "../EditorHandler"], function (require, exports, tslib_1, GetConversationLabelManager_1, PromiseMutex_1, Dialog_1, Language_1, Snackbar_1, Simple_1, EditorHandler_1) {
-    "use strict";
-    Object.defineProperty(exports, "__esModule", { value: true });
-    exports.LabelManager = void 0;
-    Simple_1 = tslib_1.__importDefault(Simple_1);
-    class LabelManager {
-        #conversationListLink;
-        #formLink;
-        #dialog;
-        #maxLabels = 0;
-        #labelCount = 0;
-        constructor(formLink, conversationListLink) {
-            this.#formLink = formLink;
-            this.#conversationListLink = conversationListLink;
-            document.getElementById("manageLabel")?.addEventListener("click", (0, PromiseMutex_1.promiseMutex)(async () => {
-                const response = await (0, GetConversationLabelManager_1.getConversationLabelManager)();
-                if (!response.ok) {
-                    throw new Error("Could not fetch conversation label manager");
-                }
-                this.#openDialog(response.value);
-            }));
-        }
-        #openDialog(data) {
-            this.#maxLabels = data.maxLabels;
-            this.#labelCount = data.labelCount;
-            this.#dialog = (0, Dialog_1.dialogFactory)().fromHtml(data.template).withoutControls();
-            this.#updateAddButtonState();
-            this.#dialog.show((0, Language_1.getPhrase)("wcf.conversation.label.management"));
-            this.#dialog?.content.querySelectorAll(".conversationLabelList .badge").forEach((badge) => {
-                const labelId = parseInt(badge.dataset.labelId);
-                badge.addEventListener("click", (0, PromiseMutex_1.promiseMutex)(async () => {
-                    await this.#openForm(labelId);
-                }));
-            });
-            this.#dialog?.content.querySelector(".addLabel")?.addEventListener("click", (0, PromiseMutex_1.promiseMutex)(async () => {
-                await this.#openForm();
-            }));
-        }
-        async #openForm(labelId) {
-            const url = new URL(this.#formLink);
-            if (labelId) {
-                url.searchParams.set("labelID", labelId.toString());
-            }
-            const response = await (0, Dialog_1.dialogFactory)().usingFormBuilder().fromEndpoint(url.toString());
-            if (response.ok) {
-                if (response.result.deleteLabel) {
-                    // check if delete label id is present within URL (causing an IllegalLinkException if reloading)
-                    const regex = new RegExp("(\\?|&)labelID=" + response.result.labelID);
-                    window.location.href = window.location.toString().replace(regex, "");
-                    return;
-                }
-                if (labelId) {
-                    window.location.reload();
-                    return;
-                }
-                this.#labelCount++;
-                const button = document.createElement("button");
-                button.type = "button";
-                button.classList.add("badge", "label", response.result.cssClassName || "");
-                button.dataset.labelId = response.result.labelID.toString();
-                button.dataset.cssClassName = response.result.cssClassName;
-                button.textContent = response.result.label;
-                button.addEventListener("click", (0, PromiseMutex_1.promiseMutex)(() => this.#openForm(response.result.labelID)));
-                const li = document.createElement("li");
-                li.append(button);
-                this.#dialog?.content.querySelector(".conversationLabelList")?.append(li);
-                this.#insertLabel(response.result);
-                this.#updateAddButtonState();
-                (0, Snackbar_1.showDefaultSuccessSnackbar)();
-            }
-        }
-        #updateAddButtonState() {
-            this.#dialog.content.querySelector(".addLabel").disabled = this.#labelCount >= this.#maxLabels;
-        }
-        #insertLabel(data) {
-            const listItem = document.createElement("li");
-            const anchor = document.createElement("a");
-            const url = new URL(this.#conversationListLink);
-            url.searchParams.set("labelID", data.labelID.toString());
-            anchor.href = url.toString();
-            const span = document.createElement("span");
-            span.className = `badge label${data.cssClassName ? " " + data.cssClassName : ""}`;
-            span.textContent = data.label;
-            span.dataset.labelID = data.labelID.toString();
-            span.dataset.cssClassName = data.cssClassName;
-            anchor.appendChild(span);
-            listItem.appendChild(anchor);
-            Simple_1.default.getDropdownMenu("conversationLabelFilter")
-                ?.querySelector(".scrollableDropdownMenu")
-                ?.append(listItem);
-            (0, EditorHandler_1.addAvailableLabel)({
-                labelID: data.labelID,
-                label: data.label,
-                cssClassName: data.cssClassName,
-                url: url.toString(),
-            });
-        }
-    }
-    exports.LabelManager = LabelManager;
-});
diff --git a/files/js/WoltLabSuite/Core/Conversation/Component/Leave.js b/files/js/WoltLabSuite/Core/Conversation/Component/Leave.js
deleted file mode 100644
index 91e564fb..00000000
--- a/files/js/WoltLabSuite/Core/Conversation/Component/Leave.js
+++ /dev/null
@@ -1,44 +0,0 @@
-/**
- * Handles the leave conversation action.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-define(["require", "exports", "tslib", "../../Api/Conversations/GetConversationLeaveDialog", "WoltLabSuite/Core/Component/Dialog", "WoltLabSuite/Core/Language", "../../Api/Conversations/LeaveConversation", "WoltLabSuite/Core/Dom/Util"], function (require, exports, tslib_1, GetConversationLeaveDialog_1, Dialog_1, Language_1, LeaveConversation_1, Util_1) {
-    "use strict";
-    Object.defineProperty(exports, "__esModule", { value: true });
-    exports.openDialog = openDialog;
-    Util_1 = tslib_1.__importDefault(Util_1);
-    async function openDialog(conversationID, environment) {
-        const result = await (0, GetConversationLeaveDialog_1.getConversationLeaveDialog)(conversationID);
-        if (result.ok) {
-            const dialog = (0, Dialog_1.dialogFactory)().fromHtml(result.value).asConfirmation();
-            dialog.addEventListener("validate", (event) => {
-                const checked = getSelectedValue(dialog) !== undefined;
-                event.detail.push(Promise.resolve(checked));
-                Util_1.default.innerError(dialog.querySelector("dl"), checked ? undefined : (0, Language_1.getPhrase)("wcf.global.form.error.empty"));
-            });
-            dialog.addEventListener("primary", () => {
-                const hideConversation = getSelectedValue(dialog);
-                void (0, LeaveConversation_1.leaveConversation)(conversationID, hideConversation).then((leaveResult) => {
-                    if (!leaveResult.ok) {
-                        return;
-                    }
-                    if (environment === "conversation") {
-                        window.location.href = leaveResult.value;
-                    }
-                    else {
-                        window.location.reload();
-                    }
-                });
-            });
-            dialog.show((0, Language_1.getPhrase)("wcf.conversation.leave.title"));
-        }
-    }
-    function getSelectedValue(dialog) {
-        const selected = dialog.querySelector('input[name="hideConversation"]:checked');
-        return selected ? parseInt(selected.value) : undefined;
-    }
-});
diff --git a/files/js/WoltLabSuite/Core/Conversation/Ui/Participant/Add.js b/files/js/WoltLabSuite/Core/Conversation/Ui/Participant/Add.js
deleted file mode 100644
index c81dfe9d..00000000
--- a/files/js/WoltLabSuite/Core/Conversation/Ui/Participant/Add.js
+++ /dev/null
@@ -1,117 +0,0 @@
-/**
- * Adds participants to an existing conversation.
- *
- * @author  Alexander Ebert
- * @copyright   2001-2021 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- */
-define(["require", "exports", "tslib", "WoltLabSuite/Core/Ajax", "WoltLabSuite/Core/Dom/Util", "WoltLabSuite/Core/Ui/Dialog", "WoltLabSuite/Core/Component/Snackbar", "WoltLabSuite/Core/Ui/ItemList/User", "WoltLabSuite/Core/Language"], function (require, exports, tslib_1, Ajax, Util_1, Dialog_1, Snackbar_1, UiItemListUser, Language) {
-    "use strict";
-    Ajax = tslib_1.__importStar(Ajax);
-    Util_1 = tslib_1.__importDefault(Util_1);
-    Dialog_1 = tslib_1.__importDefault(Dialog_1);
-    UiItemListUser = tslib_1.__importStar(UiItemListUser);
-    Language = tslib_1.__importStar(Language);
-    class UiParticipantAdd {
-        conversationId;
-        constructor(conversationId) {
-            this.conversationId = conversationId;
-            Ajax.api(this, {
-                actionName: "getAddParticipantsForm",
-            });
-        }
-        _ajaxSetup() {
-            return {
-                data: {
-                    className: "wcf\\data\\conversation\\ConversationAction",
-                    objectIDs: [this.conversationId],
-                },
-            };
-        }
-        _ajaxSuccess(data) {
-            switch (data.actionName) {
-                case "addParticipants":
-                    this.handleResponse(data);
-                    break;
-                case "getAddParticipantsForm":
-                    this.render(data);
-                    break;
-            }
-        }
-        /**
-         * Shows the success message and closes the dialog overlay.
-         */
-        handleResponse(data) {
-            if ("errorMessage" in data.returnValues) {
-                Util_1.default.innerError(document.getElementById("participantsInput").closest(".inputItemList"), data.returnValues.errorMessage);
-                return;
-            }
-            if ("count" in data.returnValues) {
-                (0, Snackbar_1.showSuccessSnackbar)(data.returnValues.successMessage).addEventListener("snackbar:close", () => {
-                    window.location.reload();
-                });
-            }
-            Dialog_1.default.close(this);
-        }
-        /**
-         * Renders the dialog to add participants.
-         * @protected
-         */
-        render(data) {
-            Dialog_1.default.open(this, data.returnValues.template);
-            const buttonSubmit = document.getElementById("addParticipants");
-            buttonSubmit.disabled = true;
-            UiItemListUser.init("participantsInput", {
-                callbackChange: (elementId, values) => {
-                    buttonSubmit.disabled = values.length === 0;
-                },
-                excludedSearchValues: data.returnValues.excludedSearchValues,
-                maxItems: data.returnValues.maxItems,
-                includeUserGroups: data.returnValues.canAddGroupParticipants && data.returnValues.restrictUserGroupIDs.length > 0,
-                restrictUserGroupIDs: data.returnValues.restrictUserGroupIDs,
-                csvPerType: true,
-            });
-            buttonSubmit.addEventListener("click", () => {
-                this.submit();
-            });
-        }
-        /**
-         * Sends a request to add participants.
-         */
-        submit() {
-            const participants = [];
-            const participantsGroupIDs = [];
-            UiItemListUser.getValues("participantsInput").forEach((value) => {
-                if (value.type === "group") {
-                    participantsGroupIDs.push(value.objectId);
-                }
-                else {
-                    participants.push(value.value);
-                }
-            });
-            const parameters = {
-                participants: participants,
-                participantsGroupIDs: participantsGroupIDs,
-                visibility: null,
-            };
-            const visibility = Dialog_1.default.getDialog(this).content.querySelector('input[name="messageVisibility"]:checked, input[name="messageVisibility"][type="hidden"]');
-            if (visibility) {
-                parameters.visibility = visibility.value;
-            }
-            Ajax.api(this, {
-                actionName: "addParticipants",
-                parameters: parameters,
-            });
-        }
-        _dialogSetup() {
-            return {
-                id: "conversationAddParticipants",
-                options: {
-                    title: Language.get("wcf.conversation.edit.addParticipants"),
-                },
-                source: null,
-            };
-        }
-    }
-    return UiParticipantAdd;
-});
diff --git a/templates/__userPanelConversationDropdown.tpl b/templates/__userPanelConversationDropdown.tpl
index 4fdc3d7b..a62b52fa 100644
--- a/templates/__userPanelConversationDropdown.tpl
+++ b/templates/__userPanelConversationDropdown.tpl
@@ -16,7 +16,6 @@
 			{/if}
 		</a>
 		{if !OFFLINE || $__wcf->session->getPermission('admin.general.canViewPageDuringOfflineMode')}
-			<script data-relocate="true" src="{$__wcf->getPath()}js/WCF.Conversation{if !ENABLE_DEBUG_MODE}.min{/if}.js?v={@LAST_UPDATE_TIME}"></script>
 			<script data-relocate="true">
 				require(["WoltLabSuite/Core/Conversation/Ui/User/Menu/Data/Conversation"], ({ setup }) => {
 					setup({
diff --git a/templates/conversation.tpl b/templates/conversation.tpl
index a0159136..808cddc3 100644
--- a/templates/conversation.tpl
+++ b/templates/conversation.tpl
@@ -44,37 +44,7 @@
 	<section class="section">
 		<h2 class="sectionTitle">{lang}wcf.conversation.participants{/lang}</h2>
 		
-		<ul class="containerBoxList tripleColumned conversationParticipantList jsObjectActionContainer" data-object-action-class-name="wcf\data\conversation\ConversationAction">
-			{foreach from=$participants item=participant}
-				<li class="jsParticipant jsObjectActionObject{if !$participant->userID || $participant->hideConversation == 2 || $participant->leftAt > 0} conversationLeft{/if}" data-object-id="{$conversation->getObjectID()}">
-					<div class="box24">
-						{user object=$participant type='avatar24' ariaHidden='true' tabindex='-1'}
-						<div>
-							<p>
-								{user object=$participant}
-								{if $participant->isInvisible}<small>({lang}wcf.conversation.invisible{/lang})</small>{/if}
-								{if $participant->userID && ($conversation->userID == $__wcf->getUser()->userID) && ($participant->userID != $__wcf->getUser()->userID) && $participant->hideConversation != 2 && $participant->leftAt == 0}
-									<button
-										type="button"
-										class="jsObjectAction jsTooltip jsOnly"
-										data-object-action="removeParticipant"
-										title="{lang}wcf.conversation.participants.removeParticipant{/lang}"
-										data-confirm-message="{lang __encode=true}wcf.conversation.participants.removeParticipant.confirmMessage{/lang}"
-										data-object-action-parameter-user-id="{$participant->getObjectID()}"
-									>
-										{icon name='xmark'}
-									</button>
-								{/if}
-							</p>
-							<dl class="plain inlineDataList small">
-								<dt>{lang}wcf.conversation.lastVisitTime{/lang}</dt>
-								<dd>{if $participant->lastVisitTime}{time time=$participant->lastVisitTime}{else}-{/if}</dd>
-							</dl>
-						</div>
-					</div>
-				</li>
-			{/foreach}
-		</ul>
+		{include file='conversationParticipantList'}
 	</section>
 {/if}
 
@@ -96,50 +66,23 @@
 	</ul>
 </div>
 
-{if !ENABLE_DEBUG_MODE}<script src="{$__wcf->getPath()}js/WoltLabSuite.Core.Conversation.min.js?v={@LAST_UPDATE_TIME}"></script>{/if}
-<script data-relocate="true" src="{$__wcf->getPath()}js/WCF.Conversation{if !ENABLE_DEBUG_MODE}.min{/if}.js?v={@LAST_UPDATE_TIME}"></script>
 <script data-relocate="true">
-	$(function() {
-		WCF.Language.addObject({
-			'wcf.conversation.edit.addParticipants': '{jslang}wcf.conversation.edit.addParticipants{/jslang}',
-			'wcf.conversation.edit.assignLabel': '{jslang}wcf.conversation.edit.assignLabel{/jslang}',
-			'wcf.conversation.edit.close': '{jslang}wcf.conversation.edit.close{/jslang}',
-			'wcf.conversation.edit.leave': '{jslang}wcf.conversation.edit.leave{/jslang}',
-			'wcf.conversation.edit.open': '{jslang}wcf.conversation.edit.open{/jslang}',
-			'wcf.conversation.edit.subject': '{jslang}wcf.conversation.edit.subject{/jslang}',
-			'wcf.conversation.leave.title': '{jslang}wcf.conversation.leave.title{/jslang}',
-			'wcf.global.state.closed': '{jslang}wcf.global.state.closed{/jslang}',
-			'wcf.global.subject': '{jslang}wcf.global.subject{/jslang}',
-			'wcf.message.bbcode.code.copy': '{jslang}wcf.message.bbcode.code.copy{/jslang}',
-			'wcf.message.error.editorAlreadyInUse': '{jslang}wcf.message.error.editorAlreadyInUse{/jslang}',
-			'wcf.conversation.label.assignLabels': '{jslang}wcf.conversation.label.assignLabels{/jslang}'
-		});
-		
-		var $availableLabels = [ {implode from=$labelList item=label}{ cssClassName: '{if $label->cssClassName}{@$label->cssClassName|encodeJS}{/if}', labelID: {@$label->labelID}, label: '{$label->label|encodeJS}' }{/implode} ];
-		var $editorHandler = new WCF.Conversation.EditorHandlerConversation($availableLabels);
-		var $inlineEditor = new WCF.Conversation.InlineEditor('.conversation');
-		$inlineEditor.setEditorHandler($editorHandler);
-		
-		{if $conversation->canReply()}
-			require(['WoltLabSuite/Core/Conversation/Ui/Message/Reply'], function({ Reply }) {
-				new Reply({
-					ajax: {
-						className: 'wcf\\data\\conversation\\message\\ConversationMessageAction'
-					},
-				});
+	{if $conversation->canReply()}
+		require(['WoltLabSuite/Core/Conversation/Ui/Message/Reply'], function({ Reply }) {
+			new Reply({
+				ajax: {
+					className: 'wcf\\data\\conversation\\message\\ConversationMessageAction'
+				},
 			});
-		{/if}
-	});
+		});
+	{/if}
 
 	require([
-		'WoltLabSuite/Core/Conversation/Ui/Object/Action/RemoveParticipant',
 		'WoltLabSuite/Core/Conversation/Ui/Message/InlineEditor',
 		'WoltLabSuite/Core/Component/Quote/Message',
-	], (UiObjectActionRemoveParticipant, { UiConversationMessageInlineEditor }, { registerContainer }) => {
+	], ({ UiConversationMessageInlineEditor }, { registerContainer }) => {
 		new UiConversationMessageInlineEditor({$conversation->conversationID});
 
-		UiObjectActionRemoveParticipant.setup();
-
 		registerContainer(".message", ".messageBody", "wcf\\data\\conversation\\message\\ConversationMessage", "com.woltlab.wcf.conversation.message");
 	});
 </script>
diff --git a/templates/conversationParticipantList.tpl b/templates/conversationParticipantList.tpl
new file mode 100644
index 00000000..37cfd140
--- /dev/null
+++ b/templates/conversationParticipantList.tpl
@@ -0,0 +1,31 @@
+<ul class="containerBoxList tripleColumned conversationParticipantList">
+	{foreach from=$participants item=participant}
+		<li class="jsParticipant{if !$participant->userID || $participant->hideConversation == 2 || $participant->leftAt > 0} conversationLeft{/if}" data-object-id="{$conversation->getObjectID()}">
+			<div class="box24">
+				{user object=$participant type='avatar24' ariaHidden='true' tabindex='-1'}
+				<div>
+					<p>
+						{user object=$participant}
+						{if $participant->isInvisible}<small>({lang}wcf.conversation.invisible{/lang})</small>{/if}
+						{if $participant->userID && ($conversation->userID == $__wcf->getUser()->userID) && ($participant->userID != $__wcf->getUser()->userID) && $participant->hideConversation != 2 && $participant->leftAt == 0}
+							<button
+								type="button"
+								class="jsTooltip jsOnly conversationRemoveParticipant"
+								title="{lang}wcf.conversation.participants.removeParticipant{/lang}"
+								data-confirm-message="{lang __encode=true}wcf.conversation.participants.removeParticipant.confirmMessage{/lang}"
+								data-participant-id="{$participant->getObjectID()}"
+								data-conversation-id="{$conversation->getObjectID()}"
+							>
+								{icon name='xmark'}
+							</button>
+						{/if}
+					</p>
+					<dl class="plain inlineDataList small">
+						<dt>{lang}wcf.conversation.lastVisitTime{/lang}</dt>
+						<dd>{if $participant->lastVisitTime}{time time=$participant->lastVisitTime}{else}-{/if}</dd>
+					</dl>
+				</div>
+			</div>
+		</li>
+	{/foreach}
+</ul>
diff --git a/ts/WoltLabSuite/Core/Api/Conversations/AssignConversationLabels.ts b/ts/WoltLabSuite/Core/Api/Conversations/AssignConversationLabels.ts
deleted file mode 100644
index 3cd6483f..00000000
--- a/ts/WoltLabSuite/Core/Api/Conversations/AssignConversationLabels.ts
+++ /dev/null
@@ -1,26 +0,0 @@
-/**
- * Assign the labels for the given conversations.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-
-import { prepareRequest } from "WoltLabSuite/Core/Ajax/Backend";
-import { ApiResult, apiResultFromError, apiResultFromValue } from "WoltLabSuite/Core/Api/Result";
-
-export async function assignConversationLabels(conversationIDs: number[], labelIDs: number[]): Promise<ApiResult<[]>> {
-  try {
-    await prepareRequest(`${window.WSC_RPC_API_URL}core/conversations/assign-labels`)
-      .post({
-        conversationIDs: conversationIDs,
-        labelIDs: labelIDs,
-      })
-      .fetchAsJson();
-  } catch (e) {
-    return apiResultFromError(e);
-  }
-
-  return apiResultFromValue([]);
-}
diff --git a/ts/WoltLabSuite/Core/Api/Conversations/GetConversationLabelManager.ts b/ts/WoltLabSuite/Core/Api/Conversations/GetConversationLabelManager.ts
deleted file mode 100644
index 386d560e..00000000
--- a/ts/WoltLabSuite/Core/Api/Conversations/GetConversationLabelManager.ts
+++ /dev/null
@@ -1,30 +0,0 @@
-/**
- * Gets the data for the conversation label manager.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-
-import { prepareRequest } from "WoltLabSuite/Core/Ajax/Backend";
-import { ApiResult, apiResultFromError, apiResultFromValue } from "WoltLabSuite/Core/Api/Result";
-
-export type Response = {
-  template: string;
-  maxLabels: number;
-  labelCount: number;
-};
-
-export async function getConversationLabelManager(): Promise<ApiResult<Response>> {
-  let response: Response;
-  try {
-    response = (await prepareRequest(`${window.WSC_RPC_API_URL}core/conversations/label-manager`)
-      .get()
-      .fetchAsJson()) as Response;
-  } catch (e) {
-    return apiResultFromError(e);
-  }
-
-  return apiResultFromValue(response);
-}
diff --git a/ts/WoltLabSuite/Core/Api/Conversations/GetConversationLabels.ts b/ts/WoltLabSuite/Core/Api/Conversations/GetConversationLabels.ts
deleted file mode 100644
index d2d27173..00000000
--- a/ts/WoltLabSuite/Core/Api/Conversations/GetConversationLabels.ts
+++ /dev/null
@@ -1,33 +0,0 @@
-/**
- * Gets the form data to assign labels to conversations.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-
-import { prepareRequest } from "WoltLabSuite/Core/Ajax/Backend";
-import { ApiResult, apiResultFromError, apiResultFromValue } from "WoltLabSuite/Core/Api/Result";
-
-export type Response = {
-  template: string;
-  formId: string;
-  title: string;
-};
-
-export async function getConversationLabels(conversationIDs: number[]): Promise<ApiResult<Response>> {
-  const url = new URL(`${window.WSC_RPC_API_URL}core/conversations/labels`);
-  for (const conversationID of conversationIDs) {
-    url.searchParams.append("conversationIDs[]", conversationID.toString());
-  }
-
-  let response: Response;
-  try {
-    response = (await prepareRequest(url).get().fetchAsJson()) as Response;
-  } catch (e) {
-    return apiResultFromError(e);
-  }
-
-  return apiResultFromValue(response);
-}
diff --git a/ts/WoltLabSuite/Core/Api/Conversations/LeaveConversation.ts b/ts/WoltLabSuite/Core/Api/Conversations/LeaveConversation.ts
deleted file mode 100644
index b1ece5dc..00000000
--- a/ts/WoltLabSuite/Core/Api/Conversations/LeaveConversation.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-/**
- * Leaves a conversation.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-
-import { prepareRequest } from "WoltLabSuite/Core/Ajax/Backend";
-import { ApiResult, apiResultFromError, apiResultFromValue } from "WoltLabSuite/Core/Api/Result";
-
-type Response = {
-  redirectUrl: string;
-};
-
-export type HideConversation = 0 | 1 | 2;
-
-export async function leaveConversation(
-  conversationId: number,
-  hideConversation: HideConversation,
-): Promise<ApiResult<string>> {
-  let response: Response;
-  try {
-    response = (await prepareRequest(`${window.WSC_RPC_API_URL}core/conversations/${conversationId}/leave`)
-      .post({
-        hideConversation,
-      })
-      .fetchAsJson()) as Response;
-  } catch (e) {
-    return apiResultFromError(e);
-  }
-
-  return apiResultFromValue(response.redirectUrl);
-}
diff --git a/ts/WoltLabSuite/Core/Conversation/Clipboard.ts b/ts/WoltLabSuite/Core/Conversation/Clipboard.ts
deleted file mode 100644
index 73c3b841..00000000
--- a/ts/WoltLabSuite/Core/Conversation/Clipboard.ts
+++ /dev/null
@@ -1,64 +0,0 @@
-/**
- * Clipboard for conversations.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-
-import { add as addEvent } from "WoltLabSuite/Core/Event/Handler";
-import { AjaxResponse, ClipboardActionData } from "WoltLabSuite/Core/Controller/Clipboard/Data";
-import { openDialog as openAssignLabelDialog } from "./Component/Label/Editor";
-import { getConversationEditor } from "./Component/EditorHandler";
-
-interface ConversationData {
-  isClosed: boolean;
-}
-
-interface ResponseData {
-  returnValues: {
-    conversationData: {
-      [key: string]: ConversationData;
-    };
-  };
-}
-
-interface EventData {
-  data: ClipboardActionData;
-  responseData: null | (ResponseData & AjaxResponse);
-}
-
-export function setup() {
-  addEvent("com.woltlab.wcf.clipboard", "com.woltlab.wcf.conversation.conversation", (data: EventData) => {
-    if (data.responseData === null) {
-      execute(data.data.actionName, data.data.parameters);
-    } else {
-      evaluateResponse(data.data.actionName, data.responseData);
-    }
-  });
-}
-
-function execute(actionName: string, parameters) {
-  if (actionName === "com.woltlab.wcf.conversation.conversation.assignLabel") {
-    void openAssignLabelDialog(parameters.objectIDs);
-  }
-}
-
-function evaluateResponse(actionName: string, data: ResponseData) {
-  switch (actionName) {
-    case "com.woltlab.wcf.conversation.conversation.leave":
-    case "com.woltlab.wcf.conversation.conversation.leavePermanently":
-    case "com.woltlab.wcf.conversation.conversation.markAsRead":
-    case "com.woltlab.wcf.conversation.conversation.restore":
-      window.location.reload();
-      break;
-
-    case "com.woltlab.wcf.conversation.conversation.close":
-    case "com.woltlab.wcf.conversation.conversation.open":
-      Object.entries(data.returnValues.conversationData).forEach(([conversationId, conversationData]) => {
-        getConversationEditor(parseInt(conversationId))!.isClosed = conversationData.isClosed;
-      });
-      break;
-  }
-}
diff --git a/ts/WoltLabSuite/Core/Conversation/Component/EditorHandler.ts b/ts/WoltLabSuite/Core/Conversation/Component/EditorHandler.ts
deleted file mode 100644
index 7e04be9b..00000000
--- a/ts/WoltLabSuite/Core/Conversation/Component/EditorHandler.ts
+++ /dev/null
@@ -1,150 +0,0 @@
-/**
- * Handles editing for conversations.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-
-import { wheneverFirstSeen } from "WoltLabSuite/Core/Helper/Selector";
-import { getPhrase } from "WoltLabSuite/Core/Language";
-import { escapeHTML } from "WoltLabSuite/Core/StringUtil";
-import { reload as reloadClipboard } from "WoltLabSuite/Core/Controller/Clipboard";
-
-export interface Label {
-  cssClassName: string;
-  labelID: number;
-  label: string;
-  url?: string;
-}
-
-const _availableLabels: Map<number, Label> = new Map();
-const conversations = new Map<number, ConversationEditor>();
-
-class ConversationEditor {
-  #conversation: HTMLElement;
-  #isClosed: boolean;
-  #canAddParticipants: boolean;
-  #canCloseConversation: boolean;
-  #labelIDs: number[];
-  #isConversationListItem: boolean;
-
-  constructor(conversation: HTMLElement) {
-    this.#conversation = conversation;
-    this.#isConversationListItem = conversation.classList.contains("jsClipboardObject");
-    this.#isClosed = conversation.dataset.isClosed === "1";
-    this.#canAddParticipants = conversation.dataset.canAddParticipants === "1";
-    this.#canCloseConversation = conversation.dataset.canCloseConversation === "1";
-    this.#labelIDs = JSON.parse(conversation.dataset.labelIds!);
-  }
-
-  get isClosed(): boolean {
-    return this.#isClosed;
-  }
-
-  set isClosed(isClosed: boolean) {
-    this.#isClosed = isClosed;
-    this.#conversation.dataset.isClosed = isClosed ? "1" : "0";
-
-    if (isClosed) {
-      this.#getContainer(".statusIcons")?.insertAdjacentHTML(
-        "beforeend",
-        `<li>
-  <span class="jsTooltip jsIconLock" title="${getPhrase("wcf.global.state.closed")}">
-    <fa-icon size="16" name="lock"></fa-icon>
-  </span>
-</li>`,
-      );
-    } else {
-      this.#getContainer(".statusIcons").querySelector("li .jsIconLock")?.parentElement?.remove();
-    }
-
-    reloadClipboard();
-  }
-
-  get canAddParticipants(): boolean {
-    return this.#canAddParticipants;
-  }
-
-  get canCloseConversation(): boolean {
-    return this.#canCloseConversation;
-  }
-
-  get labelIDs(): number[] {
-    return this.#labelIDs;
-  }
-
-  set labelIDs(labelIDs: number[]) {
-    this.#labelIDs = labelIDs;
-    this.#conversation.dataset.labelIDs = JSON.stringify(labelIDs);
-
-    const labels = labelIDs.map((labelID) => {
-      return getLabel(labelID)!;
-    });
-
-    let labelList = this.#getContainer(".columnSubject > .labelList");
-    if (labelIDs.length == 0) {
-      labelList?.remove();
-    } else {
-      if (!labelList) {
-        labelList = document.createElement("ul");
-        labelList.classList.add("labelList");
-        this.#getContainer(".columnSubject")?.insertAdjacentElement("afterbegin", labelList);
-      }
-
-      // remove old labels
-      labelList.innerHTML = "";
-
-      for (const label of labels) {
-        if (this.#isConversationListItem) {
-          labelList.insertAdjacentHTML(
-            "beforeend",
-            `<li><a href="${escapeHTML(label.url!)}" class="badge label ${label.cssClassName}">${escapeHTML(label.label)}</a></li>`,
-          );
-        } else {
-          labelList.insertAdjacentHTML(
-            "beforeend",
-            `<li><span class="badge label ${label.cssClassName}">${escapeHTML(label.label)}</span></li>`,
-          );
-        }
-      }
-    }
-
-    reloadClipboard();
-  }
-
-  #getContainer(selector: string): HTMLElement {
-    if (this.#isConversationListItem) {
-      return this.#conversation.querySelector(selector)!;
-    } else {
-      return document.querySelector(".contentHeaderTitle > .contentHeaderMetaData")!;
-    }
-  }
-}
-
-export function getAvailableLabels(): Label[] {
-  return Array.from(_availableLabels.values());
-}
-
-export function addAvailableLabel(label: Label) {
-  _availableLabels.set(label.labelID, label);
-}
-
-export function getLabel(labelID: number): Label | undefined {
-  return _availableLabels.get(labelID);
-}
-
-export function getConversationEditor(conversationID: number): ConversationEditor | undefined {
-  return conversations.get(conversationID);
-}
-
-export function setup(availableLabels: Label[]) {
-  availableLabels.forEach((label) => {
-    _availableLabels.set(label.labelID, label);
-  });
-
-  wheneverFirstSeen(".conversation", (conversation) => {
-    conversations.set(parseInt(conversation.dataset.conversationId!), new ConversationEditor(conversation));
-  });
-}
diff --git a/ts/WoltLabSuite/Core/Conversation/Component/Label/Editor.ts b/ts/WoltLabSuite/Core/Conversation/Component/Label/Editor.ts
deleted file mode 100644
index 43491e10..00000000
--- a/ts/WoltLabSuite/Core/Conversation/Component/Label/Editor.ts
+++ /dev/null
@@ -1,53 +0,0 @@
-/**
- * Editor to assign labels to conversations.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-
-import { dialogFactory } from "WoltLabSuite/Core/Component/Dialog";
-import { getConversationLabels } from "../../../Api/Conversations/GetConversationLabels";
-import * as FormBuilderManager from "WoltLabSuite/Core/Form/Builder/Manager";
-import { assignConversationLabels } from "../../../Api/Conversations/AssignConversationLabels";
-import { reload as reloadClipboard } from "WoltLabSuite/Core/Controller/Clipboard";
-import { showDefaultSuccessSnackbar } from "WoltLabSuite/Core/Component/Snackbar";
-import { getConversationEditor } from "../EditorHandler";
-
-export async function openDialog(conversationIDs: number[]) {
-  const response = await getConversationLabels(conversationIDs);
-  if (!response.ok) {
-    throw new Error("Failed to load form to assign labels to conversations.");
-  }
-
-  const dialog = dialogFactory().fromHtml(response.value.template).asPrompt();
-  dialog.addEventListener("afterClose", () => {
-    if (FormBuilderManager.hasForm(response.value.formId)) {
-      FormBuilderManager.unregisterForm(response.value.formId);
-    }
-  });
-  dialog.addEventListener("primary", () => {
-    void FormBuilderManager.getData(response.value.formId).then(async (data) => {
-      const labelIDs: number[] = [];
-      for (const labelID of data["conversationLabel_labelIDs"]) {
-        labelIDs.push(parseInt(labelID));
-      }
-
-      await assignConversationLabels(conversationIDs, labelIDs);
-
-      assignLabels(conversationIDs, labelIDs);
-      reloadClipboard();
-    });
-  });
-
-  dialog.show(response.value.title);
-}
-
-function assignLabels(conversationIDs: number[], labelIDs: number[]) {
-  conversationIDs.forEach((conversationID) => {
-    getConversationEditor(conversationID)!.labelIDs = labelIDs;
-  });
-
-  showDefaultSuccessSnackbar();
-}
diff --git a/ts/WoltLabSuite/Core/Conversation/Component/Label/Manager.ts b/ts/WoltLabSuite/Core/Conversation/Component/Label/Manager.ts
deleted file mode 100644
index 950fc8da..00000000
--- a/ts/WoltLabSuite/Core/Conversation/Component/Label/Manager.ts
+++ /dev/null
@@ -1,155 +0,0 @@
-/**
- * Managed the labels of a conversation.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-
-import {
-  getConversationLabelManager,
-  Response as ManagerResponse,
-} from "../../../Api/Conversations/GetConversationLabelManager";
-import { promiseMutex } from "WoltLabSuite/Core/Helper/PromiseMutex";
-import { dialogFactory } from "WoltLabSuite/Core/Component/Dialog";
-import WoltlabCoreDialogElement from "WoltLabSuite/Core/Element/woltlab-core-dialog";
-import { getPhrase } from "WoltLabSuite/Core/Language";
-import { showDefaultSuccessSnackbar } from "WoltLabSuite/Core/Component/Snackbar";
-import UiDropdownSimple from "WoltLabSuite/Core/Ui/Dropdown/Simple";
-import { addAvailableLabel } from "../EditorHandler";
-
-interface LabelFormResponse {
-  deleteLabel: boolean;
-  labelID: number;
-  label: string;
-  cssClassName: string;
-}
-
-export class LabelManager {
-  #conversationListLink: string;
-  #formLink: string;
-  #dialog?: WoltlabCoreDialogElement;
-  #maxLabels = 0;
-  #labelCount = 0;
-
-  constructor(formLink: string, conversationListLink: string) {
-    this.#formLink = formLink;
-    this.#conversationListLink = conversationListLink;
-
-    document.getElementById("manageLabel")?.addEventListener(
-      "click",
-      promiseMutex(async () => {
-        const response = await getConversationLabelManager();
-        if (!response.ok) {
-          throw new Error("Could not fetch conversation label manager");
-        }
-
-        this.#openDialog(response.value);
-      }),
-    );
-  }
-
-  #openDialog(data: ManagerResponse): void {
-    this.#maxLabels = data.maxLabels;
-    this.#labelCount = data.labelCount;
-
-    this.#dialog = dialogFactory().fromHtml(data.template).withoutControls();
-    this.#updateAddButtonState();
-    this.#dialog.show(getPhrase("wcf.conversation.label.management"));
-
-    this.#dialog?.content.querySelectorAll(".conversationLabelList .badge").forEach((badge: HTMLElement) => {
-      const labelId = parseInt(badge.dataset.labelId!);
-      badge.addEventListener(
-        "click",
-        promiseMutex(async () => {
-          await this.#openForm(labelId);
-        }),
-      );
-    });
-
-    this.#dialog?.content.querySelector(".addLabel")?.addEventListener(
-      "click",
-      promiseMutex(async () => {
-        await this.#openForm();
-      }),
-    );
-  }
-
-  async #openForm(labelId?: number) {
-    const url = new URL(this.#formLink);
-    if (labelId) {
-      url.searchParams.set("labelID", labelId.toString());
-    }
-
-    const response = await dialogFactory().usingFormBuilder().fromEndpoint<LabelFormResponse>(url.toString());
-    if (response.ok) {
-      if (response.result.deleteLabel) {
-        // check if delete label id is present within URL (causing an IllegalLinkException if reloading)
-        const regex = new RegExp("(\\?|&)labelID=" + response.result.labelID);
-        window.location.href = window.location.toString().replace(regex, "");
-        return;
-      }
-
-      if (labelId) {
-        window.location.reload();
-        return;
-      }
-
-      this.#labelCount++;
-
-      const button = document.createElement("button");
-      button.type = "button";
-      button.classList.add("badge", "label", response.result.cssClassName || "");
-      button.dataset.labelId = response.result.labelID.toString();
-      button.dataset.cssClassName = response.result.cssClassName;
-      button.textContent = response.result.label;
-      button.addEventListener(
-        "click",
-        promiseMutex(() => this.#openForm(response.result.labelID)),
-      );
-
-      const li = document.createElement("li");
-      li.append(button);
-
-      this.#dialog?.content.querySelector(".conversationLabelList")?.append(li);
-      this.#insertLabel(response.result);
-
-      this.#updateAddButtonState();
-      showDefaultSuccessSnackbar();
-    }
-  }
-
-  #updateAddButtonState(): void {
-    this.#dialog!.content.querySelector<HTMLButtonElement>(".addLabel")!.disabled = this.#labelCount >= this.#maxLabels;
-  }
-
-  #insertLabel(data: LabelFormResponse): void {
-    const listItem = document.createElement("li");
-    const anchor = document.createElement("a");
-
-    const url = new URL(this.#conversationListLink);
-    url.searchParams.set("labelID", data.labelID.toString());
-    anchor.href = url.toString();
-
-    const span = document.createElement("span");
-    span.className = `badge label${data.cssClassName ? " " + data.cssClassName : ""}`;
-    span.textContent = data.label;
-    span.dataset.labelID = data.labelID.toString();
-    span.dataset.cssClassName = data.cssClassName;
-
-    anchor.appendChild(span);
-    listItem.appendChild(anchor);
-
-    UiDropdownSimple.getDropdownMenu("conversationLabelFilter")
-      ?.querySelector(".scrollableDropdownMenu")
-      ?.append(listItem);
-
-    addAvailableLabel({
-      labelID: data.labelID,
-      label: data.label,
-      cssClassName: data.cssClassName,
-      url: url.toString(),
-    });
-  }
-}
diff --git a/ts/WoltLabSuite/Core/Conversation/Component/Leave.ts b/ts/WoltLabSuite/Core/Conversation/Component/Leave.ts
deleted file mode 100644
index c946089e..00000000
--- a/ts/WoltLabSuite/Core/Conversation/Component/Leave.ts
+++ /dev/null
@@ -1,52 +0,0 @@
-/**
- * Handles the leave conversation action.
- *
- * @author  Olaf Braun
- * @copyright  2001-2025 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since 6.2
- */
-
-import { getConversationLeaveDialog } from "../../Api/Conversations/GetConversationLeaveDialog";
-import { dialogFactory } from "WoltLabSuite/Core/Component/Dialog";
-import { getPhrase } from "WoltLabSuite/Core/Language";
-import { leaveConversation, HideConversation } from "../../Api/Conversations/LeaveConversation";
-import DomUtil from "WoltLabSuite/Core/Dom/Util";
-
-type Environment = "conversation" | "";
-
-export async function openDialog(conversationID: number, environment: Environment) {
-  const result = await getConversationLeaveDialog(conversationID);
-  if (result.ok) {
-    const dialog = dialogFactory().fromHtml(result.value).asConfirmation();
-    dialog.addEventListener("validate", (event) => {
-      const checked = getSelectedValue(dialog) !== undefined;
-
-      event.detail.push(Promise.resolve(checked));
-
-      DomUtil.innerError(dialog.querySelector("dl")!, checked ? undefined : getPhrase("wcf.global.form.error.empty"));
-    });
-    dialog.addEventListener("primary", () => {
-      const hideConversation = getSelectedValue(dialog)!;
-
-      void leaveConversation(conversationID, hideConversation).then((leaveResult) => {
-        if (!leaveResult.ok) {
-          return;
-        }
-
-        if (environment === "conversation") {
-          window.location.href = leaveResult.value;
-        } else {
-          window.location.reload();
-        }
-      });
-    });
-    dialog.show(getPhrase("wcf.conversation.leave.title"));
-  }
-}
-
-function getSelectedValue(dialog: HTMLElement): HideConversation | undefined {
-  const selected = dialog.querySelector<HTMLInputElement>('input[name="hideConversation"]:checked');
-
-  return selected ? (parseInt(selected.value) as HideConversation) : undefined;
-}
diff --git a/ts/WoltLabSuite/Core/Conversation/Ui/Participant/Add.ts b/ts/WoltLabSuite/Core/Conversation/Ui/Participant/Add.ts
deleted file mode 100644
index 989323a0..00000000
--- a/ts/WoltLabSuite/Core/Conversation/Ui/Participant/Add.ts
+++ /dev/null
@@ -1,167 +0,0 @@
-/**
- * Adds participants to an existing conversation.
- *
- * @author  Alexander Ebert
- * @copyright   2001-2021 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- */
-
-import * as Ajax from "WoltLabSuite/Core/Ajax";
-import { AjaxCallbackObject } from "WoltLabSuite/Core/Ajax/Data";
-import { AjaxCallbackSetup, ResponseData } from "WoltLabSuite/Core/Ajax/Data";
-import DomUtil from "WoltLabSuite/Core/Dom/Util";
-import UiDialog from "WoltLabSuite/Core/Ui/Dialog";
-import { showSuccessSnackbar } from "WoltLabSuite/Core/Component/Snackbar";
-import { DialogCallbackObject, DialogCallbackSetup } from "WoltLabSuite/Core/Ui/Dialog/Data";
-import * as UiItemListUser from "WoltLabSuite/Core/Ui/ItemList/User";
-import { ItemData } from "WoltLabSuite/Core/Ui/ItemList";
-import * as Language from "WoltLabSuite/Core/Language";
-
-interface AjaxResponseData extends ResponseData {
-  actionName: "addParticipants" | "getAddParticipantsForm";
-}
-
-interface AjaxAddParticipantsData extends AjaxResponseData {
-  returnValues:
-    | {
-        errorMessage: string;
-      }
-    | {
-        count: number;
-        successMessage: string;
-      };
-}
-
-interface AjaxGetAddParticipantsFormData extends AjaxResponseData {
-  returnValues: {
-    canAddGroupParticipants: boolean;
-    csvPerType: boolean;
-    excludedSearchValues: string[];
-    maxItems: number;
-    restrictUserGroupIDs: number[];
-    template: string;
-  };
-}
-
-class UiParticipantAdd implements AjaxCallbackObject, DialogCallbackObject {
-  protected readonly conversationId: number;
-
-  constructor(conversationId: number) {
-    this.conversationId = conversationId;
-
-    Ajax.api(this, {
-      actionName: "getAddParticipantsForm",
-    });
-  }
-
-  _ajaxSetup(): ReturnType<AjaxCallbackSetup> {
-    return {
-      data: {
-        className: "wcf\\data\\conversation\\ConversationAction",
-        objectIDs: [this.conversationId],
-      },
-    };
-  }
-
-  _ajaxSuccess(data: AjaxResponseData): void {
-    switch (data.actionName) {
-      case "addParticipants":
-        this.handleResponse(data as AjaxAddParticipantsData);
-        break;
-      case "getAddParticipantsForm":
-        this.render(data as AjaxGetAddParticipantsFormData);
-        break;
-    }
-  }
-
-  /**
-   * Shows the success message and closes the dialog overlay.
-   */
-  protected handleResponse(data: AjaxAddParticipantsData): void {
-    if ("errorMessage" in data.returnValues) {
-      DomUtil.innerError(
-        document.getElementById("participantsInput")!.closest(".inputItemList")!,
-        data.returnValues.errorMessage,
-      );
-      return;
-    }
-
-    if ("count" in data.returnValues) {
-      showSuccessSnackbar(data.returnValues.successMessage).addEventListener("snackbar:close", () => {
-        window.location.reload();
-      });
-    }
-
-    UiDialog.close(this);
-  }
-
-  /**
-   * Renders the dialog to add participants.
-   * @protected
-   */
-  protected render(data: AjaxGetAddParticipantsFormData): void {
-    UiDialog.open(this, data.returnValues.template);
-
-    const buttonSubmit = document.getElementById("addParticipants") as HTMLButtonElement;
-    buttonSubmit.disabled = true;
-
-    UiItemListUser.init("participantsInput", {
-      callbackChange: (elementId: string, values: ItemData[]): void => {
-        buttonSubmit.disabled = values.length === 0;
-      },
-      excludedSearchValues: data.returnValues.excludedSearchValues,
-      maxItems: data.returnValues.maxItems,
-      includeUserGroups: data.returnValues.canAddGroupParticipants && data.returnValues.restrictUserGroupIDs.length > 0,
-      restrictUserGroupIDs: data.returnValues.restrictUserGroupIDs,
-      csvPerType: true,
-    });
-    buttonSubmit.addEventListener("click", () => {
-      this.submit();
-    });
-  }
-
-  /**
-   * Sends a request to add participants.
-   */
-  protected submit(): void {
-    const participants: string[] = [];
-    const participantsGroupIDs: number[] = [];
-    UiItemListUser.getValues("participantsInput").forEach((value) => {
-      if (value.type === "group") {
-        participantsGroupIDs.push(value.objectId);
-      } else {
-        participants.push(value.value);
-      }
-    });
-
-    const parameters = {
-      participants: participants,
-      participantsGroupIDs: participantsGroupIDs,
-      visibility: null as null | string,
-    };
-    const visibility = UiDialog.getDialog(this)!.content.querySelector<HTMLInputElement>(
-      'input[name="messageVisibility"]:checked, input[name="messageVisibility"][type="hidden"]',
-    );
-
-    if (visibility) {
-      parameters.visibility = visibility.value;
-    }
-
-    Ajax.api(this, {
-      actionName: "addParticipants",
-      parameters: parameters,
-    });
-  }
-
-  _dialogSetup(): ReturnType<DialogCallbackSetup> {
-    return {
-      id: "conversationAddParticipants",
-      options: {
-        title: Language.get("wcf.conversation.edit.addParticipants"),
-      },
-      source: null,
-    };
-  }
-}
-
-export = UiParticipantAdd;

From 89c0a71ea655e082f390dc74424e8f5be1c115cd Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Thu, 26 Jun 2025 13:28:32 +0200
Subject: [PATCH 12/24] Use RPC-Endpoint to remove a participant from a
 conversation

---
 ...ionLeaveDialog.js => RemoveParticipant.js} |  10 +-
 .../Conversation/RemoveParticipant.js         |  31 +++++
 .../Ui/Object/Action/RemoveParticipant.js     |  20 ---
 .../com.woltlab.wcf.conversation.php          |   5 +-
 .../RemoveConversationParticipant.class.php   |  43 ++++++
 .../AssignConversationLabels.class.php        | 130 ------------------
 .../GetConversationLabelManager.class.php     |  45 ------
 .../GetConversationLabels.class.php           | 122 ----------------
 .../GetConversationLeaveDialog.class.php      |  63 ---------
 .../RemoveConversationParticipant.class.php   |  77 +++++++++++
 ...ionLeaveDialog.ts => RemoveParticipant.ts} |  10 +-
 .../Conversation/RemoveParticipant.ts         |  39 ++++++
 .../Core/Conversation/Bootstrap.ts            |   6 +
 .../Ui/Object/Action/RemoveParticipant.ts     |  19 ---
 14 files changed, 208 insertions(+), 412 deletions(-)
 rename files/js/WoltLabSuite/Core/Api/Conversations/{GetConversationLeaveDialog.js => RemoveParticipant.js} (70%)
 create mode 100644 files/js/WoltLabSuite/Core/Component/Conversation/RemoveParticipant.js
 delete mode 100644 files/js/WoltLabSuite/Core/Conversation/Ui/Object/Action/RemoveParticipant.js
 create mode 100644 files/lib/system/conversation/command/RemoveConversationParticipant.class.php
 delete mode 100644 files/lib/system/endpoint/controller/core/conversations/AssignConversationLabels.class.php
 delete mode 100644 files/lib/system/endpoint/controller/core/conversations/GetConversationLabelManager.class.php
 delete mode 100644 files/lib/system/endpoint/controller/core/conversations/GetConversationLabels.class.php
 delete mode 100644 files/lib/system/endpoint/controller/core/conversations/GetConversationLeaveDialog.class.php
 create mode 100644 files/lib/system/endpoint/controller/core/conversations/RemoveConversationParticipant.class.php
 rename ts/WoltLabSuite/Core/Api/Conversations/{GetConversationLeaveDialog.ts => RemoveParticipant.ts} (63%)
 create mode 100644 ts/WoltLabSuite/Core/Component/Conversation/RemoveParticipant.ts
 delete mode 100644 ts/WoltLabSuite/Core/Conversation/Ui/Object/Action/RemoveParticipant.ts

diff --git a/files/js/WoltLabSuite/Core/Api/Conversations/GetConversationLeaveDialog.js b/files/js/WoltLabSuite/Core/Api/Conversations/RemoveParticipant.js
similarity index 70%
rename from files/js/WoltLabSuite/Core/Api/Conversations/GetConversationLeaveDialog.js
rename to files/js/WoltLabSuite/Core/Api/Conversations/RemoveParticipant.js
index 997affed..af853049 100644
--- a/files/js/WoltLabSuite/Core/Api/Conversations/GetConversationLeaveDialog.js
+++ b/files/js/WoltLabSuite/Core/Api/Conversations/RemoveParticipant.js
@@ -1,5 +1,5 @@
 /**
- * Gets the html code for the rendering the conversation leave dialog.
+ * Remove a participant from a conversation.
  *
  * @author  Olaf Braun
  * @copyright  2001-2025 WoltLab GmbH
@@ -9,12 +9,12 @@
 define(["require", "exports", "WoltLabSuite/Core/Ajax/Backend", "WoltLabSuite/Core/Api/Result"], function (require, exports, Backend_1, Result_1) {
     "use strict";
     Object.defineProperty(exports, "__esModule", { value: true });
-    exports.getConversationLeaveDialog = getConversationLeaveDialog;
-    async function getConversationLeaveDialog(conversationId) {
+    exports.removeParticipant = removeParticipant;
+    async function removeParticipant(conversationId, participantId) {
         let response;
         try {
-            response = (await (0, Backend_1.prepareRequest)(`${window.WSC_RPC_API_URL}core/conversations/${conversationId}/leave-dialog`)
-                .get()
+            response = (await (0, Backend_1.prepareRequest)(`${window.WSC_RPC_API_URL}core/conversations/${conversationId}/participants/${participantId}`)
+                .delete()
                 .fetchAsJson());
         }
         catch (e) {
diff --git a/files/js/WoltLabSuite/Core/Component/Conversation/RemoveParticipant.js b/files/js/WoltLabSuite/Core/Component/Conversation/RemoveParticipant.js
new file mode 100644
index 00000000..5d08027d
--- /dev/null
+++ b/files/js/WoltLabSuite/Core/Component/Conversation/RemoveParticipant.js
@@ -0,0 +1,31 @@
+/**
+ * Reacts to participants being removed from a conversation.
+ *
+ * @author Olaf Braun, Matthias Schmidt
+ * @copyright  2001-2025 WoltLab GmbH
+ * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ */
+define(["require", "exports", "WoltLabSuite/Core/Helper/Selector", "../../Api/Conversations/RemoveParticipant", "WoltLabSuite/Core/Helper/PromiseMutex", "WoltLabSuite/Core/Component/Confirmation", "WoltLabSuite/Core/Language"], function (require, exports, Selector_1, RemoveParticipant_1, PromiseMutex_1, Confirmation_1, Language_1) {
+    "use strict";
+    Object.defineProperty(exports, "__esModule", { value: true });
+    exports.setup = setup;
+    function setup() {
+        (0, Selector_1.wheneverSeen)(".conversationRemoveParticipant", (element) => {
+            const participantId = parseInt(element.dataset.participantId || "0", 10);
+            const conversationId = parseInt(element.dataset.conversationId || "0", 10);
+            const confirmMessage = element.dataset.confirmMessage;
+            element.addEventListener("click", (0, PromiseMutex_1.promiseMutex)(async () => {
+                const confirmed = await (0, Confirmation_1.confirmationFactory)()
+                    .custom((0, Language_1.getPhrase)("wcf.global.confirmation.title"))
+                    .message(confirmMessage);
+                if (confirmed) {
+                    const response = await (0, RemoveParticipant_1.removeParticipant)(conversationId, participantId);
+                    if (!response.ok) {
+                        return;
+                    }
+                    document.querySelector(".conversationParticipantList").outerHTML = response.value;
+                }
+            }));
+        });
+    }
+});
diff --git a/files/js/WoltLabSuite/Core/Conversation/Ui/Object/Action/RemoveParticipant.js b/files/js/WoltLabSuite/Core/Conversation/Ui/Object/Action/RemoveParticipant.js
deleted file mode 100644
index aef87fbb..00000000
--- a/files/js/WoltLabSuite/Core/Conversation/Ui/Object/Action/RemoveParticipant.js
+++ /dev/null
@@ -1,20 +0,0 @@
-/**
- * Reacts to participants being removed from a conversation.
- *
- * @author  Matthias Schmidt
- * @copyright  2001-2021 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- */
-define(["require", "exports", "tslib", "WoltLabSuite/Core/Ui/Object/Action/Handler"], function (require, exports, tslib_1, Handler_1) {
-    "use strict";
-    Object.defineProperty(exports, "__esModule", { value: true });
-    exports.setup = setup;
-    Handler_1 = tslib_1.__importDefault(Handler_1);
-    function removeParticipant(data) {
-        data.objectElement.querySelector(".userLink").classList.add("conversationLeft");
-        data.objectElement.querySelector(".jsObjectAction[data-object-action='removeParticipant']").remove();
-    }
-    function setup() {
-        new Handler_1.default("removeParticipant", [], removeParticipant);
-    }
-});
diff --git a/files/lib/bootstrap/com.woltlab.wcf.conversation.php b/files/lib/bootstrap/com.woltlab.wcf.conversation.php
index 5ee70c3d..a4c00c4b 100644
--- a/files/lib/bootstrap/com.woltlab.wcf.conversation.php
+++ b/files/lib/bootstrap/com.woltlab.wcf.conversation.php
@@ -46,10 +46,7 @@ static function (\wcf\event\endpoint\ControllerCollecting $event) {
             $event->register(new \wcf\system\endpoint\controller\core\conversations\OpenConversation());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\CloseConversation());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationHeaderTitle());
-            $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationLeaveDialog());
-            $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationLabels());
-            $event->register(new \wcf\system\endpoint\controller\core\conversations\AssignConversationLabels());
-            $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationLabelManager());
+            $event->register(new \wcf\system\endpoint\controller\core\conversations\RemoveConversationParticipant());
         }
     );
 };
diff --git a/files/lib/system/conversation/command/RemoveConversationParticipant.class.php b/files/lib/system/conversation/command/RemoveConversationParticipant.class.php
new file mode 100644
index 00000000..a3336f2f
--- /dev/null
+++ b/files/lib/system/conversation/command/RemoveConversationParticipant.class.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace wcf\system\conversation\command;
+
+use wcf\data\conversation\Conversation;
+use wcf\data\conversation\ConversationEditor;
+use wcf\system\log\modification\ConversationModificationLogHandler;
+use wcf\system\user\storage\UserStorageHandler;
+
+/**
+ * Command for removing a participant from a conversation.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+final class RemoveConversationParticipant
+{
+    public function __construct(
+        public readonly Conversation $conversation,
+        public readonly int $participantID,
+    ) {
+    }
+
+    public function __invoke(): void
+    {
+        $editor = new ConversationEditor($this->conversation);
+        $editor->removeParticipant($this->participantID);
+        $editor->updateParticipantSummary();
+
+        $userConversation = Conversation::getUserConversation(
+            $this->conversation->conversationID,
+            $this->participantID
+        );
+
+        if (!$userConversation->isInvisible) {
+            ConversationModificationLogHandler::getInstance()->removeParticipant($this->conversation, $this->participantID);
+        }
+
+        UserStorageHandler::getInstance()->reset([$this->participantID], 'unreadConversationCount');
+    }
+}
diff --git a/files/lib/system/endpoint/controller/core/conversations/AssignConversationLabels.class.php b/files/lib/system/endpoint/controller/core/conversations/AssignConversationLabels.class.php
deleted file mode 100644
index 561b738c..00000000
--- a/files/lib/system/endpoint/controller/core/conversations/AssignConversationLabels.class.php
+++ /dev/null
@@ -1,130 +0,0 @@
-<?php
-
-namespace wcf\system\endpoint\controller\core\conversations;
-
-use Laminas\Diactoros\Response\JsonResponse;
-use Psr\Http\Message\ResponseInterface;
-use Psr\Http\Message\ServerRequestInterface;
-use wcf\data\conversation\Conversation;
-use wcf\data\conversation\label\ConversationLabel;
-use wcf\data\conversation\label\ConversationLabelList;
-use wcf\http\Helper;
-use wcf\system\clipboard\ClipboardHandler;
-use wcf\system\database\util\PreparedStatementConditionBuilder;
-use wcf\system\endpoint\IController;
-use wcf\system\endpoint\PostRequest;
-use wcf\system\exception\IllegalLinkException;
-use wcf\system\exception\PermissionDeniedException;
-use wcf\system\WCF;
-
-/**
- * API endpoint for assigning labels to conversations.
- *
- * @author      Olaf Braun
- * @copyright   2001-2025 WoltLab GmbH
- * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since       6.2
- *
- * TODO remove
- */
-#[PostRequest('/core/conversations/assign-labels')]
-final class AssignConversationLabels implements IController
-{
-    #[\Override]
-    public function __invoke(ServerRequestInterface $request, array $variables): ResponseInterface
-    {
-        $parameters = Helper::mapApiParameters($request, AssignConversationLabelsParameters::class);
-        $conversationIDs = $parameters->conversationIDs;
-
-        if ($conversationIDs === []) {
-            throw new IllegalLinkException();
-        }
-        if (!Conversation::isParticipant($conversationIDs)) {
-            throw new PermissionDeniedException();
-        }
-
-        $labelIDs = $parameters->labelIDs;
-
-        $labelList = ConversationLabel::getLabelsByUser();
-        if (!\count($labelList)) {
-            throw new IllegalLinkException();
-        }
-
-        foreach ($labelIDs as $labelID) {
-            if (!\in_array($labelID, $labelList->getObjectIDs())) {
-                throw new PermissionDeniedException();
-            }
-        }
-
-        $this->removeOldLabels($labelList, $conversationIDs);
-        $this->assignLabels($conversationIDs, $labelIDs);
-
-        ClipboardHandler::getInstance()->unmark(
-            $conversationIDs,
-            ClipboardHandler::getInstance()->getObjectTypeID('com.woltlab.wcf.conversation.conversation')
-        );
-
-        return new JsonResponse([]);
-    }
-
-    /**
-     * @param int[] $conversationIDs
-     */
-    private function removeOldLabels(ConversationLabelList $labelList, array $conversationIDs): void
-    {
-        // remove previous labels (if any)
-        $labelIDs = [];
-        foreach ($labelList as $label) {
-            $labelIDs[] = $label->labelID;
-        }
-
-        $conditions = new PreparedStatementConditionBuilder();
-        $conditions->add("conversationID IN (?)", [$conversationIDs]);
-        $conditions->add("labelID IN (?)", [$labelIDs]);
-
-        $sql = "DELETE FROM wcf1_conversation_label_to_object
-                " . $conditions;
-        $statement = WCF::getDB()->prepare($sql);
-        $statement->execute($conditions->getParameters());
-    }
-
-    /**
-     * @param int[] $conversationIDs
-     * @param int[] $labelIDs
-     */
-    private function assignLabels(array $conversationIDs, array $labelIDs): void
-    {
-        if ($labelIDs === []) {
-            return;
-        }
-
-        // assign label ids
-        $sql = "INSERT INTO wcf1_conversation_label_to_object
-                                (labelID, conversationID)
-                    VALUES      (?, ?)";
-        $statement = WCF::getDB()->prepare($sql);
-
-        WCF::getDB()->beginTransaction();
-        foreach ($labelIDs as $labelID) {
-            foreach ($conversationIDs as $conversationID) {
-                $statement->execute([
-                    $labelID,
-                    $conversationID,
-                ]);
-            }
-        }
-        WCF::getDB()->commitTransaction();
-    }
-}
-
-/** @internal */
-final class AssignConversationLabelsParameters
-{
-    public function __construct(
-        /** @var array<positive-int> * */
-        public readonly array $conversationIDs,
-        /** @var array<positive-int> * */
-        public readonly array $labelIDs
-    ) {
-    }
-}
diff --git a/files/lib/system/endpoint/controller/core/conversations/GetConversationLabelManager.class.php b/files/lib/system/endpoint/controller/core/conversations/GetConversationLabelManager.class.php
deleted file mode 100644
index d407a595..00000000
--- a/files/lib/system/endpoint/controller/core/conversations/GetConversationLabelManager.class.php
+++ /dev/null
@@ -1,45 +0,0 @@
-<?php
-
-namespace wcf\system\endpoint\controller\core\conversations;
-
-use Laminas\Diactoros\Response\JsonResponse;
-use Psr\Http\Message\ResponseInterface;
-use Psr\Http\Message\ServerRequestInterface;
-use wcf\data\conversation\label\ConversationLabel;
-use wcf\system\endpoint\GetRequest;
-use wcf\system\endpoint\IController;
-use wcf\system\exception\PermissionDeniedException;
-use wcf\system\WCF;
-
-/**
- * API endpoint for rendering the label manager dialog.
- *
- * @author      Olaf Braun
- * @copyright   2001-2025 WoltLab GmbH
- * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since       6.2
- */
-#[GetRequest('/core/conversations/label-manager')]
-final class GetConversationLabelManager implements IController
-{
-    #[\Override]
-    public function __invoke(ServerRequestInterface $request, array $variables): ResponseInterface
-    {
-        if (!WCF::getUser()->userID) {
-            throw new PermissionDeniedException();
-        }
-
-        if (!WCF::getSession()->getPermission('user.conversation.canUseConversation')) {
-            throw new PermissionDeniedException();
-        }
-
-        return new JsonResponse([
-            'template' => WCF::getTPL()->render('wcf', 'conversationLabelManagement', [
-                'cssClassNames' => ConversationLabel::getLabelCssClassNames(),
-                'labelList' => ConversationLabel::getLabelsByUser(),
-            ]),
-            'maxLabels' => WCF::getSession()->getPermission('user.conversation.maxLabels'),
-            'labelCount' => \count(ConversationLabel::getLabelsByUser()),
-        ]);
-    }
-}
diff --git a/files/lib/system/endpoint/controller/core/conversations/GetConversationLabels.class.php b/files/lib/system/endpoint/controller/core/conversations/GetConversationLabels.class.php
deleted file mode 100644
index c17c071a..00000000
--- a/files/lib/system/endpoint/controller/core/conversations/GetConversationLabels.class.php
+++ /dev/null
@@ -1,122 +0,0 @@
-<?php
-
-namespace wcf\system\endpoint\controller\core\conversations;
-
-use Laminas\Diactoros\Response\JsonResponse;
-use Psr\Http\Message\ResponseInterface;
-use Psr\Http\Message\ServerRequestInterface;
-use wcf\data\conversation\Conversation;
-use wcf\data\conversation\label\ConversationLabel;
-use wcf\data\conversation\label\ConversationLabelList;
-use wcf\http\Helper;
-use wcf\system\database\util\PreparedStatementConditionBuilder;
-use wcf\system\endpoint\GetRequest;
-use wcf\system\endpoint\IController;
-use wcf\system\exception\IllegalLinkException;
-use wcf\system\exception\PermissionDeniedException;
-use wcf\system\form\builder\DialogFormDocument;
-use wcf\system\form\builder\field\MultipleSelectionFormField;
-use wcf\system\WCF;
-use wcf\util\StringUtil;
-
-/**
- * API endpoint for rendering the label selection form.
- *
- * @author      Olaf Braun
- * @copyright   2001-2025 WoltLab GmbH
- * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since       6.2
- *
- * TODO remove
- */
-#[GetRequest('/core/conversations/labels')]
-final class GetConversationLabels implements IController
-{
-    #[\Override]
-    public function __invoke(ServerRequestInterface $request, array $variables): ResponseInterface
-    {
-        $parameters = Helper::mapApiParameters($request, GetConversationLabelsParameters::class);
-        $conversationIDs = $parameters->conversationIDs;
-
-        if ($conversationIDs === []) {
-            throw new IllegalLinkException();
-        }
-        if (!Conversation::isParticipant($conversationIDs)) {
-            throw new PermissionDeniedException();
-        }
-
-        // Get the conversationID if only one conversation is selected
-        // to preselect the label.
-        $conversationID = null;
-        if (\count($conversationIDs) === 1) {
-            $conversationID = \reset($conversationIDs);
-        }
-
-        $labelList = ConversationLabel::getLabelsByUser();
-        if (!\count($labelList)) {
-            throw new IllegalLinkException();
-        }
-        $id = "conversationLabel";
-
-        return new JsonResponse([
-            'formId' => $id,
-            'title' => WCF::getLanguage()->get('wcf.conversation.label.assignLabels'),
-            'template' => $this->getForm($id, $labelList, $conversationID)->getHtml(),
-        ]);
-    }
-
-    private function getForm(string $id, ConversationLabelList $labelList, ?int $conversationID): DialogFormDocument
-    {
-        return DialogFormDocument::create($id)
-            ->ajax()
-            ->prefix($id)
-            ->appendChildren([
-                MultipleSelectionFormField::create('labelIDs')
-                    ->options(
-                        \array_map(static function (ConversationLabel $label) {
-                            return \sprintf(
-                                '<span class="badge label%s">%s</span>',
-                                empty($label->cssClassName) ? '' : ' ' . $label->cssClassName,
-                                StringUtil::encodeHTML($label->label)
-                            );
-                        }, $labelList->getObjects())
-                    )
-                    ->value($this->getAssignedLabelIDs($labelList->getObjectIDs(), $conversationID)),
-            ])
-            ->addDefaultButton(false)
-            ->build();
-    }
-
-    /**
-     * @param int[] $labelIDs
-     * @return int[]
-     */
-    private function getAssignedLabelIDs(array $labelIDs, ?int $conversationID): array
-    {
-        if ($conversationID === null) {
-            return [];
-        }
-
-        $conditions = new PreparedStatementConditionBuilder();
-        $conditions->add("conversationID = ?", [$conversationID]);
-        $conditions->add("labelID IN (?)", [$labelIDs]);
-
-        $sql = "SELECT  labelID
-                FROM    wcf1_conversation_label_to_object
-                " . $conditions;
-        $statement = WCF::getDB()->prepare($sql);
-        $statement->execute($conditions->getParameters());
-
-        return $statement->fetchAll(\PDO::FETCH_COLUMN);
-    }
-}
-
-/** @internal */
-final class GetConversationLabelsParameters
-{
-    public function __construct(
-        /** @var array<positive-int> * */
-        public readonly array $conversationIDs
-    ) {
-    }
-}
diff --git a/files/lib/system/endpoint/controller/core/conversations/GetConversationLeaveDialog.class.php b/files/lib/system/endpoint/controller/core/conversations/GetConversationLeaveDialog.class.php
deleted file mode 100644
index 70bd1b37..00000000
--- a/files/lib/system/endpoint/controller/core/conversations/GetConversationLeaveDialog.class.php
+++ /dev/null
@@ -1,63 +0,0 @@
-<?php
-
-namespace wcf\system\endpoint\controller\core\conversations;
-
-use Laminas\Diactoros\Response\JsonResponse;
-use Psr\Http\Message\ResponseInterface;
-use Psr\Http\Message\ServerRequestInterface;
-use wcf\data\conversation\Conversation;
-use wcf\http\Helper;
-use wcf\system\endpoint\GetRequest;
-use wcf\system\endpoint\IController;
-use wcf\system\exception\PermissionDeniedException;
-use wcf\system\WCF;
-
-/**
- * API endpoint for rendering the conversation leave dialog.
- *
- * @author      Olaf Braun
- * @copyright   2001-2025 WoltLab GmbH
- * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @since       6.2
- *
- * TODO remove
- */
-#[GetRequest('/core/conversations/{id:\d+}/leave-dialog')]
-final class GetConversationLeaveDialog implements IController
-{
-    #[\Override]
-    public function __invoke(ServerRequestInterface $request, array $variables): ResponseInterface
-    {
-        $conversation = Helper::fetchObjectFromRequestParameter($variables['id'], Conversation::class);
-
-        $this->assertConversationIsAccessible($conversation);
-
-        return new JsonResponse([
-            'template' => WCF::getTPL()->render('wcf', 'conversationLeave', [
-                'hideConversation' => $this->isConversationHidden($conversation),
-            ])
-        ]);
-    }
-
-    private function assertConversationIsAccessible(Conversation $conversation): void
-    {
-        if (!Conversation::isParticipant([$conversation->conversationID])) {
-            throw new PermissionDeniedException();
-        }
-    }
-
-    private function isConversationHidden(Conversation $conversation): bool
-    {
-        $sql = "SELECT  hideConversation
-                FROM    wcf1_conversation_to_user
-                WHERE   conversationID = ?
-                    AND participantID = ?";
-        $statement = WCF::getDB()->prepare($sql);
-        $statement->execute([
-            $conversation->conversationID,
-            WCF::getUser()->userID,
-        ]);
-
-        return \boolval($statement->fetchSingleColumn());
-    }
-}
diff --git a/files/lib/system/endpoint/controller/core/conversations/RemoveConversationParticipant.class.php b/files/lib/system/endpoint/controller/core/conversations/RemoveConversationParticipant.class.php
new file mode 100644
index 00000000..2a84166e
--- /dev/null
+++ b/files/lib/system/endpoint/controller/core/conversations/RemoveConversationParticipant.class.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace wcf\system\endpoint\controller\core\conversations;
+
+use Laminas\Diactoros\Response\JsonResponse;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use wcf\data\conversation\Conversation;
+use wcf\data\conversation\ConversationParticipantList;
+use wcf\http\Helper;
+use wcf\system\endpoint\DeleteRequest;
+use wcf\system\endpoint\IController;
+use wcf\system\exception\IllegalLinkException;
+use wcf\system\exception\PermissionDeniedException;
+use wcf\system\WCF;
+
+/**
+ * API endpoint for removing a participant from a conversation.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+#[DeleteRequest('/core/conversations/{conversationId:\d+}/participants/{participantId:\d+}')]
+final class RemoveConversationParticipant implements IController
+{
+    #[\Override]
+    public function __invoke(ServerRequestInterface $request, array $variables): ResponseInterface
+    {
+        $conversation = Helper::fetchObjectFromRequestParameter($variables['conversationId'], Conversation::class);
+        $participantUserID = \intval($variables['participantId']);
+
+        $this->assertCanRemoveParticipant($conversation, $participantUserID);
+
+        (new \wcf\system\conversation\command\RemoveConversationParticipant($conversation, $participantUserID))();
+
+        return new JsonResponse([
+            'template' => WCF::getTPL()->render('wcf', 'conversationParticipantList', [
+                'conversation' => $conversation,
+                'participants' => $this->getParticipantList($conversation),
+            ]),
+        ]);
+    }
+
+    private function assertCanRemoveParticipant(Conversation $conversation, int $participantUserID): void
+    {
+        if (!Conversation::isParticipant([$conversation->conversationID])) {
+            throw new PermissionDeniedException();
+        }
+
+        if ($conversation->userID !== WCF::getUser()->userID) {
+            throw new PermissionDeniedException();
+        }
+
+        if ($participantUserID === WCF::getUser()->userID) {
+            throw new IllegalLinkException();
+        }
+
+        $participantUserIDs = $conversation->getParticipantIDs(true);
+        if (!\in_array($participantUserID, $participantUserIDs)) {
+            throw new IllegalLinkException();
+        }
+    }
+
+    private function getParticipantList(Conversation $conversation): ConversationParticipantList
+    {
+        $participantList = new ConversationParticipantList(
+            $conversation->conversationID,
+            WCF::getUser()->userID,
+            $conversation->userID === WCF::getUser()->userID
+        );
+        $participantList->readObjects();
+
+        return $participantList;
+    }
+}
diff --git a/ts/WoltLabSuite/Core/Api/Conversations/GetConversationLeaveDialog.ts b/ts/WoltLabSuite/Core/Api/Conversations/RemoveParticipant.ts
similarity index 63%
rename from ts/WoltLabSuite/Core/Api/Conversations/GetConversationLeaveDialog.ts
rename to ts/WoltLabSuite/Core/Api/Conversations/RemoveParticipant.ts
index d1236d00..9cfd74ed 100644
--- a/ts/WoltLabSuite/Core/Api/Conversations/GetConversationLeaveDialog.ts
+++ b/ts/WoltLabSuite/Core/Api/Conversations/RemoveParticipant.ts
@@ -1,5 +1,5 @@
 /**
- * Gets the html code for the rendering the conversation leave dialog.
+ * Remove a participant from a conversation.
  *
  * @author  Olaf Braun
  * @copyright  2001-2025 WoltLab GmbH
@@ -14,11 +14,13 @@ type Response = {
   template: string;
 };
 
-export async function getConversationLeaveDialog(conversationId: number): Promise<ApiResult<string>> {
+export async function removeParticipant(conversationId: number, participantId: number): Promise<ApiResult<string>> {
   let response: Response;
   try {
-    response = (await prepareRequest(`${window.WSC_RPC_API_URL}core/conversations/${conversationId}/leave-dialog`)
-      .get()
+    response = (await prepareRequest(
+      `${window.WSC_RPC_API_URL}core/conversations/${conversationId}/participants/${participantId}`,
+    )
+      .delete()
       .fetchAsJson()) as Response;
   } catch (e) {
     return apiResultFromError(e);
diff --git a/ts/WoltLabSuite/Core/Component/Conversation/RemoveParticipant.ts b/ts/WoltLabSuite/Core/Component/Conversation/RemoveParticipant.ts
new file mode 100644
index 00000000..c3a703b7
--- /dev/null
+++ b/ts/WoltLabSuite/Core/Component/Conversation/RemoveParticipant.ts
@@ -0,0 +1,39 @@
+/**
+ * Reacts to participants being removed from a conversation.
+ *
+ * @author Olaf Braun, Matthias Schmidt
+ * @copyright  2001-2025 WoltLab GmbH
+ * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ */
+
+import { wheneverSeen } from "WoltLabSuite/Core/Helper/Selector";
+import { removeParticipant } from "../../Api/Conversations/RemoveParticipant";
+import { promiseMutex } from "WoltLabSuite/Core/Helper/PromiseMutex";
+import { confirmationFactory } from "WoltLabSuite/Core/Component/Confirmation";
+import { getPhrase } from "WoltLabSuite/Core/Language";
+
+export function setup(): void {
+  wheneverSeen(".conversationRemoveParticipant", (element: HTMLButtonElement) => {
+    const participantId = parseInt(element.dataset.participantId || "0", 10);
+    const conversationId = parseInt(element.dataset.conversationId || "0", 10);
+    const confirmMessage = element.dataset.confirmMessage!;
+
+    element.addEventListener(
+      "click",
+      promiseMutex(async () => {
+        const confirmed = await confirmationFactory()
+          .custom(getPhrase("wcf.global.confirmation.title"))
+          .message(confirmMessage);
+
+        if (confirmed) {
+          const response = await removeParticipant(conversationId, participantId);
+          if (!response.ok) {
+            return;
+          }
+
+          document.querySelector(".conversationParticipantList")!.outerHTML = response.value;
+        }
+      }),
+    );
+  });
+}
diff --git a/ts/WoltLabSuite/Core/Conversation/Bootstrap.ts b/ts/WoltLabSuite/Core/Conversation/Bootstrap.ts
index 07dc87db..ad163dcf 100644
--- a/ts/WoltLabSuite/Core/Conversation/Bootstrap.ts
+++ b/ts/WoltLabSuite/Core/Conversation/Bootstrap.ts
@@ -22,6 +22,12 @@ function setupPopover(): void {
       });
     });
   });
+
+  whenFirstSeen(".conversationRemoveParticipant", () => {
+    void import("../Component/Conversation/RemoveParticipant").then(({ setup }) => {
+      setup();
+    });
+  });
 }
 
 export function setup(): void {
diff --git a/ts/WoltLabSuite/Core/Conversation/Ui/Object/Action/RemoveParticipant.ts b/ts/WoltLabSuite/Core/Conversation/Ui/Object/Action/RemoveParticipant.ts
deleted file mode 100644
index 6330cb8f..00000000
--- a/ts/WoltLabSuite/Core/Conversation/Ui/Object/Action/RemoveParticipant.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-/**
- * Reacts to participants being removed from a conversation.
- *
- * @author  Matthias Schmidt
- * @copyright  2001-2021 WoltLab GmbH
- * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- */
-
-import UiObjectActionHandler from "WoltLabSuite/Core/Ui/Object/Action/Handler";
-import { ObjectActionData } from "WoltLabSuite/Core/Ui/Object/Data";
-
-function removeParticipant(data: ObjectActionData): void {
-  data.objectElement.querySelector(".userLink")!.classList.add("conversationLeft");
-  data.objectElement.querySelector(".jsObjectAction[data-object-action='removeParticipant']")!.remove();
-}
-
-export function setup(): void {
-  new UiObjectActionHandler("removeParticipant", [], removeParticipant);
-}

From 1cf92a8909fa21df69cef6609ac8efa689191d00 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Thu, 26 Jun 2025 13:55:21 +0200
Subject: [PATCH 13/24] Reload participant list after interactions executed

---
 .../Api/Conversations/GetParticipantList.js   | 25 ++++++++
 .../com.woltlab.wcf.conversation.php          |  1 +
 .../GetConversationParticipantList.class.php  | 60 +++++++++++++++++++
 templates/conversation.tpl                    | 19 +++++-
 .../Api/Conversations/GetParticipantList.ts   | 28 +++++++++
 5 files changed, 132 insertions(+), 1 deletion(-)
 create mode 100644 files/js/WoltLabSuite/Core/Api/Conversations/GetParticipantList.js
 create mode 100644 files/lib/system/endpoint/controller/core/conversations/GetConversationParticipantList.class.php
 create mode 100644 ts/WoltLabSuite/Core/Api/Conversations/GetParticipantList.ts

diff --git a/files/js/WoltLabSuite/Core/Api/Conversations/GetParticipantList.js b/files/js/WoltLabSuite/Core/Api/Conversations/GetParticipantList.js
new file mode 100644
index 00000000..34fa146b
--- /dev/null
+++ b/files/js/WoltLabSuite/Core/Api/Conversations/GetParticipantList.js
@@ -0,0 +1,25 @@
+/**
+ * Gets the html code for the rendering of the participant list of a conversation.
+ *
+ * @author  Olaf Braun
+ * @copyright  2001-2025 WoltLab GmbH
+ * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+define(["require", "exports", "WoltLabSuite/Core/Ajax/Backend", "WoltLabSuite/Core/Api/Result"], function (require, exports, Backend_1, Result_1) {
+    "use strict";
+    Object.defineProperty(exports, "__esModule", { value: true });
+    exports.getParticipantList = getParticipantList;
+    async function getParticipantList(conversationId) {
+        let response;
+        try {
+            response = (await (0, Backend_1.prepareRequest)(`${window.WSC_RPC_API_URL}core/conversations/${conversationId}/participants`)
+                .get()
+                .fetchAsJson());
+        }
+        catch (e) {
+            return (0, Result_1.apiResultFromError)(e);
+        }
+        return (0, Result_1.apiResultFromValue)(response.template);
+    }
+});
diff --git a/files/lib/bootstrap/com.woltlab.wcf.conversation.php b/files/lib/bootstrap/com.woltlab.wcf.conversation.php
index a4c00c4b..c8b5ffac 100644
--- a/files/lib/bootstrap/com.woltlab.wcf.conversation.php
+++ b/files/lib/bootstrap/com.woltlab.wcf.conversation.php
@@ -47,6 +47,7 @@ static function (\wcf\event\endpoint\ControllerCollecting $event) {
             $event->register(new \wcf\system\endpoint\controller\core\conversations\CloseConversation());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationHeaderTitle());
             $event->register(new \wcf\system\endpoint\controller\core\conversations\RemoveConversationParticipant());
+            $event->register(new \wcf\system\endpoint\controller\core\conversations\GetConversationParticipantList());
         }
     );
 };
diff --git a/files/lib/system/endpoint/controller/core/conversations/GetConversationParticipantList.class.php b/files/lib/system/endpoint/controller/core/conversations/GetConversationParticipantList.class.php
new file mode 100644
index 00000000..f5f2b3c1
--- /dev/null
+++ b/files/lib/system/endpoint/controller/core/conversations/GetConversationParticipantList.class.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace wcf\system\endpoint\controller\core\conversations;
+
+use Laminas\Diactoros\Response\JsonResponse;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use wcf\data\conversation\Conversation;
+use wcf\data\conversation\ConversationParticipantList;
+use wcf\http\Helper;
+use wcf\system\endpoint\GetRequest;
+use wcf\system\endpoint\IController;
+use wcf\system\exception\PermissionDeniedException;
+use wcf\system\WCF;
+
+/**
+ * API endpoint for retrieving the participant list of a conversation.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+#[GetRequest('/core/conversations/{conversationId:\d+}/participants')]
+final class GetConversationParticipantList implements IController
+{
+    #[\Override]
+    public function __invoke(ServerRequestInterface $request, array $variables): ResponseInterface
+    {
+        $conversation = Helper::fetchObjectFromRequestParameter($variables['conversationId'], Conversation::class);
+
+        $this->assertCanRetrieveParticipantList($conversation);
+
+        return new JsonResponse([
+            'template' => WCF::getTPL()->render('wcf', 'conversationParticipantList', [
+                'conversation' => $conversation,
+                'participants' => $this->getParticipantList($conversation),
+            ]),
+        ]);
+    }
+
+    private function assertCanRetrieveParticipantList(Conversation $conversation): void
+    {
+        if (!Conversation::isParticipant([$conversation->conversationID])) {
+            throw new PermissionDeniedException();
+        }
+    }
+
+    private function getParticipantList(Conversation $conversation): ConversationParticipantList
+    {
+        $participantList = new ConversationParticipantList(
+            $conversation->conversationID,
+            WCF::getUser()->userID,
+            $conversation->userID === WCF::getUser()->userID
+        );
+        $participantList->readObjects();
+
+        return $participantList;
+    }
+}
diff --git a/templates/conversation.tpl b/templates/conversation.tpl
index 808cddc3..490b3e11 100644
--- a/templates/conversation.tpl
+++ b/templates/conversation.tpl
@@ -80,10 +80,27 @@
 	require([
 		'WoltLabSuite/Core/Conversation/Ui/Message/InlineEditor',
 		'WoltLabSuite/Core/Component/Quote/Message',
-	], ({ UiConversationMessageInlineEditor }, { registerContainer }) => {
+		'WoltLabSuite/Core/Api/Conversations/GetParticipantList',
+	], ({ UiConversationMessageInlineEditor }, { registerContainer }, { getParticipantList }) => {
 		new UiConversationMessageInlineEditor({$conversation->conversationID});
 
 		registerContainer(".message", ".messageBody", "wcf\\data\\conversation\\message\\ConversationMessage", "com.woltlab.wcf.conversation.message");
+
+		const contextMenu = document.getElementById('{unsafe:$interactionContextMenu->getContainerID()|encodeJS}')
+		console.log(contextMenu);
+		contextMenu.addEventListener('interaction:invalidate', () => reloadConversationParticipantList())
+		contextMenu.addEventListener('interaction:invalidate-all', () => reloadConversationParticipantList())
+
+		function reloadConversationParticipantList () {
+			void getParticipantList({$conversation->conversationID}).then((response) => {
+				if (!response.ok) {
+					return;
+				}
+
+				const participantList = document.querySelector('.conversationParticipantList');
+				participantList.outerHTML = response.value;
+			});
+		}
 	});
 </script>
 
diff --git a/ts/WoltLabSuite/Core/Api/Conversations/GetParticipantList.ts b/ts/WoltLabSuite/Core/Api/Conversations/GetParticipantList.ts
new file mode 100644
index 00000000..ca85885d
--- /dev/null
+++ b/ts/WoltLabSuite/Core/Api/Conversations/GetParticipantList.ts
@@ -0,0 +1,28 @@
+/**
+ * Gets the html code for the rendering of the participant list of a conversation.
+ *
+ * @author  Olaf Braun
+ * @copyright  2001-2025 WoltLab GmbH
+ * @license  GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+
+import { prepareRequest } from "WoltLabSuite/Core/Ajax/Backend";
+import { ApiResult, apiResultFromError, apiResultFromValue } from "WoltLabSuite/Core/Api/Result";
+
+type Response = {
+  template: string;
+};
+
+export async function getParticipantList(conversationId: number): Promise<ApiResult<string>> {
+  let response: Response;
+  try {
+    response = (await prepareRequest(`${window.WSC_RPC_API_URL}core/conversations/${conversationId}/participants`)
+      .get()
+      .fetchAsJson()) as Response;
+  } catch (e) {
+    return apiResultFromError(e);
+  }
+
+  return apiResultFromValue(response.template);
+}

From 971ce930ea048c19d60080f1ca7b11a7e4854d47 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Fri, 27 Jun 2025 07:46:29 +0200
Subject: [PATCH 14/24] Remove unused template

---
 templateDelete.xml                        |  3 +++
 templates/conversationAddParticipants.tpl | 26 -----------------------
 templates/conversationLabelManagement.tpl | 21 ------------------
 templates/conversationLeave.tpl           | 16 --------------
 4 files changed, 3 insertions(+), 63 deletions(-)
 delete mode 100644 templates/conversationAddParticipants.tpl
 delete mode 100644 templates/conversationLabelManagement.tpl
 delete mode 100644 templates/conversationLeave.tpl

diff --git a/templateDelete.xml b/templateDelete.xml
index 75fc3546..d9dcb756 100644
--- a/templateDelete.xml
+++ b/templateDelete.xml
@@ -3,5 +3,8 @@
 	<delete>
 		<template>conversationListUserPanel</template>
 		<template>conversationLabelAssignment</template>
+		<template>conversationLeave</template>
+		<template>conversationLabelManagement</template>
+		<template>conversationAddParticipants</template>
 	</delete>
 </data>
diff --git a/templates/conversationAddParticipants.tpl b/templates/conversationAddParticipants.tpl
deleted file mode 100644
index fecdd1ad..00000000
--- a/templates/conversationAddParticipants.tpl
+++ /dev/null
@@ -1,26 +0,0 @@
-<dl class="jsAddParticipants">
-	<dt><label for="participantsInput">{lang}wcf.conversation.participants{/lang}</label></dt>
-	<dd>
-		<textarea id="participantsInput" name="participants" class="long" cols="40" rows="2"></textarea>
-		<small>{lang}wcf.conversation.participants.description{/lang}</small>
-	</dd>
-</dl>
-{if !$conversation->isDraft}
-	{if $conversation->canAddParticipantsUnrestricted()}
-		<dl role="group" aria-labelledby="messageVisibilityLabel" class="jsRestrictVisibility">
-			<dt><label id="messageVisibilityLabel">{lang}wcf.conversation.visibility{/lang}</label></dt>
-			<dd>
-				<label><input type="radio" name="messageVisibility" value="all" checked> {lang}wcf.conversation.visibility.all{/lang}</label>
-				<small>{lang}wcf.conversation.visibility.all.description{/lang}</small>
-				<label><input type="radio" name="messageVisibility" value="new"> {lang}wcf.conversation.visibility.new{/lang}</label>
-				<small>{lang}wcf.conversation.visibility.new.description{/lang}</small>
-			</dd>
-		</dl>
-	{else}
-		<input type="hidden" name="messageVisibility" value="new">
-	{/if}
-{/if}
-
-<div class="formSubmit">
-	<button type="button" id="addParticipants" class="button buttonPrimary">{lang}wcf.global.button.submit{/lang}</button>
-</div>
\ No newline at end of file
diff --git a/templates/conversationLabelManagement.tpl b/templates/conversationLabelManagement.tpl
deleted file mode 100644
index bdc37944..00000000
--- a/templates/conversationLabelManagement.tpl
+++ /dev/null
@@ -1,21 +0,0 @@
-{hascontent}
-	<section class="section">
-		<header class="sectionHeader">
-			<h2 class="sectionTitle">{lang}wcf.conversation.label.management.existingLabels{/lang}</h2>
-			<p class="sectionDescription">{lang}wcf.conversation.label.management.edit.description{/lang}</p>
-		</header>
-		<ul class="conversationLabelList">
-			{content}
-				{foreach from=$labelList item=label}
-					<li>
-						<button type="button" class="badge label{if $label->cssClassName} {$label->cssClassName}{/if}" data-label-id="{$label->labelID}" data-css-class-name="{if $label->cssClassName}{$label->cssClassName}{else}none{/if}">{$label->label}</button>
-					</li>
-				{/foreach}
-			{/content}
-		</ul>
-	</section>
-{/hascontent}
-
-<section class="section">
-	<button type="button" class="button addLabel buttonPrimary">{lang}wcf.conversation.label.management.addLabel{/lang}</button>
-</section>
diff --git a/templates/conversationLeave.tpl b/templates/conversationLeave.tpl
deleted file mode 100644
index 1ee1e111..00000000
--- a/templates/conversationLeave.tpl
+++ /dev/null
@@ -1,16 +0,0 @@
-<dl role="group" aria-label="{lang}wcf.conversation.hideConversation{/lang}" class="wide">
-	{if $hideConversation}
-		<dd>
-			<label><input type="radio" name="hideConversation" value="0"> {lang}wcf.conversation.hideConversation.restore{/lang}</label>
-		</dd>
-	{else}
-		<dd>
-			<label><input type="radio" name="hideConversation" value="1"> {lang}wcf.conversation.hideConversation.leave{/lang}</label>
-			<small>{lang}wcf.conversation.hideConversation.leave.description{/lang}</small>
-		</dd>
-	{/if}
-	<dd>
-		<label><input type="radio" name="hideConversation" value="2"> {lang}wcf.conversation.hideConversation.leavePermanently{/lang}</label>
-		<small>{lang}wcf.conversation.hideConversation.leavePermanently.description{/lang}</small>
-	</dd>
-</dl>

From e05e7ff3dbc4afb3481eedc14779566f0506b684 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Fri, 27 Jun 2025 07:46:58 +0200
Subject: [PATCH 15/24] Add language items for interaction confirmation message

---
 .../bulk/user/ConversationBulkInteractions.class.php |  7 ++++---
 .../user/ConversationInteractions.class.php          | 12 ++++++------
 language/de.xml                                      |  7 +++++--
 language/en.xml                                      |  7 +++++--
 4 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/files/lib/system/interaction/bulk/user/ConversationBulkInteractions.class.php b/files/lib/system/interaction/bulk/user/ConversationBulkInteractions.class.php
index bbe6f4e1..0862d776 100644
--- a/files/lib/system/interaction/bulk/user/ConversationBulkInteractions.class.php
+++ b/files/lib/system/interaction/bulk/user/ConversationBulkInteractions.class.php
@@ -52,14 +52,15 @@ public function __construct()
                 'core/conversations/%s/restore',
                 'wcf.conversation.hideConversation.restore',
                 InteractionConfirmationType::Custom,
-                isAvailableCallback: static fn (ViewableConversation $conversation) => (bool)$conversation->hideConversation
+                'wcf.conversation.hideConversation.restore.confirmationMessage',
+                static fn (ViewableConversation $conversation) => (bool)$conversation->hideConversation
             ),
             new BulkRpcInteraction(
                 'leave',
                 'core/conversations/%s/leave',
                 'wcf.conversation.hideConversation.leave',
                 InteractionConfirmationType::Custom,
-                'wcf.conversation.hideConversation.leave.description',
+                'wcf.conversation.hideConversation.leave.confirmationMessage',
                 static fn (ViewableConversation $conversation) => !$conversation->hideConversation
             ),
             new BulkRpcInteraction(
@@ -67,7 +68,7 @@ public function __construct()
                 'core/conversations/%s/leave-permanently',
                 'wcf.conversation.hideConversation.leavePermanently',
                 InteractionConfirmationType::Custom,
-                'wcf.conversation.hideConversation.leavePermanently.description',
+                'wcf.conversation.hideConversation.leavePermanently.confirmationMessage',
             ),
         ]);
 
diff --git a/files/lib/system/interaction/user/ConversationInteractions.class.php b/files/lib/system/interaction/user/ConversationInteractions.class.php
index d9ea7e51..7581620c 100644
--- a/files/lib/system/interaction/user/ConversationInteractions.class.php
+++ b/files/lib/system/interaction/user/ConversationInteractions.class.php
@@ -17,6 +17,7 @@
 use wcf\system\interaction\EditInteraction;
 use wcf\system\interaction\FormBuilderDialogInteraction;
 use wcf\system\interaction\InteractionConfirmationType;
+use wcf\system\interaction\InteractionEffect;
 use wcf\system\interaction\RpcInteraction;
 use wcf\system\request\LinkHandler;
 use wcf\system\WCF;
@@ -72,21 +73,21 @@ public function __construct()
                 'core/conversations/%s/restore',
                 'wcf.conversation.hideConversation.restore',
                 InteractionConfirmationType::Custom,
-                isAvailableCallback: static function (ViewableConversation|Conversation $conversation) {
+                'wcf.conversation.hideConversation.restore.confirmationMessage',
+                static function (ViewableConversation|Conversation $conversation) {
                     if (!($conversation instanceof ViewableConversation)) {
                         $conversation = UserConversationRuntimeCache::getInstance()->getObject($conversation->conversationID);
                     }
 
                     return (bool)$conversation->hideConversation;
                 },
-                invalidatesAllItems: true
             ),
             new RpcInteraction(
                 'leave',
                 'core/conversations/%s/leave',
                 'wcf.conversation.hideConversation.leave',
                 InteractionConfirmationType::Custom,
-                'wcf.conversation.hideConversation.leave.description',
+                'wcf.conversation.hideConversation.leave.confirmationMessage',
                 static function (ViewableConversation|Conversation $conversation) {
                     if (!($conversation instanceof ViewableConversation)) {
                         $conversation = UserConversationRuntimeCache::getInstance()->getObject($conversation->conversationID);
@@ -94,15 +95,14 @@ static function (ViewableConversation|Conversation $conversation) {
 
                     return !$conversation->hideConversation;
                 },
-                true
             ),
             new RpcInteraction(
                 'leave-permanently',
                 'core/conversations/%s/leave-permanently',
                 'wcf.conversation.hideConversation.leavePermanently',
                 InteractionConfirmationType::Custom,
-                'wcf.conversation.hideConversation.leavePermanently.description',
-                invalidatesAllItems: true
+                'wcf.conversation.hideConversation.leavePermanently.confirmationMessage',
+                interactionEffect: InteractionEffect::RemoveItem,
             ),
             new EditInteraction(
                 ConversationDraftEditForm::class,
diff --git a/language/de.xml b/language/de.xml
index 797e4e9f..22bbe406 100644
--- a/language/de.xml
+++ b/language/de.xml
@@ -83,10 +83,11 @@
 		<item name="wcf.conversation.folder.outbox"><![CDATA[Gestartet]]></item>
 		<item name="wcf.conversation.hideConversation"><![CDATA[Teilnahme verwalten]]></item>
 		<item name="wcf.conversation.hideConversation.leave"><![CDATA[Ausblenden]]></item>
-		<item name="wcf.conversation.hideConversation.leave.description"><![CDATA[Die Konversation wird bis zu einer neuen Antwort nicht mehr als aktive Konversation gelistet.]]></item>
 		<item name="wcf.conversation.hideConversation.leavePermanently"><![CDATA[Verlassen]]></item>
-		<item name="wcf.conversation.hideConversation.leavePermanently.description"><![CDATA[Die Konversation wird verlassen und {if LANGUAGE_USE_INFORMAL_VARIANT}du wirst{else}Sie werden{/if} nicht länger als aktiver Teilnehmer gelistet.]]></item>
 		<item name="wcf.conversation.hideConversation.restore"><![CDATA[Als aktiv markieren]]></item>
+		<item name="wcf.conversation.hideConversation.restore.confirmationMessage"><![CDATA[Konversation wieder als aktiv markieren?]]></item>
+		<item name="wcf.conversation.hideConversation.leavePermanently.confirmationMessage"><![CDATA[{if LANGUAGE_USE_INFORMAL_VARIANT}Möchtest du{else}Möchten Sie{/if} die Konversation wirklich verlassen, {if LANGUAGE_USE_INFORMAL_VARIANT}du wirst{else}Sie werden{/if} nicht länger als aktiver Teilnehmer gelistet?]]></item>
+		<item name="wcf.conversation.hideConversation.leave.confirmationMessage"><![CDATA[Konversation ausblenden, bis eine neue Antwort verfasst wird?]]></item>
 		<item name="wcf.conversation.information"><![CDATA[Informationen]]></item>
 		<item name="wcf.conversation.invisible"><![CDATA[unsichtbar]]></item>
 		<item name="wcf.conversation.invisibleParticipants"><![CDATA[Unsichtbare Teilnehmer]]></item>
@@ -286,5 +287,7 @@
 	<item name="wcf.user.usersOnline.location.ConversationMessageAddForm"/>
 	<item name="wcf.user.usersOnline.location.ConversationMessageEditForm"/>
 	<item name="wcf.user.usersOnline.location.ConversationPage"/>
+	<item name="wcf.conversation.hideConversation.leave.description"/>
+	<item name="wcf.conversation.hideConversation.leavePermanently.description"/>
 </delete>
 </language>
diff --git a/language/en.xml b/language/en.xml
index 24c6e6d0..c11d09d9 100644
--- a/language/en.xml
+++ b/language/en.xml
@@ -83,10 +83,11 @@
 		<item name="wcf.conversation.folder.outbox"><![CDATA[Started]]></item>
 		<item name="wcf.conversation.hideConversation"><![CDATA[Manage Participation]]></item>
 		<item name="wcf.conversation.hideConversation.leave"><![CDATA[Hide]]></item>
-		<item name="wcf.conversation.hideConversation.leave.description"><![CDATA[The conversation will no longer be listed as an active conversation until a new message is written to it.]]></item>
 		<item name="wcf.conversation.hideConversation.leavePermanently"><![CDATA[Leave]]></item>
-		<item name="wcf.conversation.hideConversation.leavePermanently.description"><![CDATA[After leaving the conversation, you will no longer be listed as an active participant.]]></item>
 		<item name="wcf.conversation.hideConversation.restore"><![CDATA[Mark as Active]]></item>
+		<item name="wcf.conversation.hideConversation.restore.confirmationMessage"><![CDATA[Mark conversation as active again?]]></item>
+		<item name="wcf.conversation.hideConversation.leavePermanently.confirmationMessage"><![CDATA[Are you sure you want to leave the conversation? You will no longer be listed as an active participant.]]></item>
+		<item name="wcf.conversation.hideConversation.leave.confirmationMessage"><![CDATA[List conversation as inactive, until a new message is written?]]></item>
 		<item name="wcf.conversation.information"><![CDATA[Details]]></item>
 		<item name="wcf.conversation.invisible"><![CDATA[invisible]]></item>
 		<item name="wcf.conversation.invisibleParticipants"><![CDATA[Invisible Participants]]></item>
@@ -277,5 +278,7 @@
 	<item name="wcf.user.usersOnline.location.ConversationMessageAddForm"/>
 	<item name="wcf.user.usersOnline.location.ConversationMessageEditForm"/>
 	<item name="wcf.user.usersOnline.location.ConversationPage"/>
+	<item name="wcf.conversation.hideConversation.leave.description"/>
+	<item name="wcf.conversation.hideConversation.leavePermanently.description"/>
 </delete>
 </language>

From d6e91651810fa20f1f57f7b6891f519b214cbb5c Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Fri, 27 Jun 2025 08:46:20 +0200
Subject: [PATCH 16/24] Filter out already added participants when adding to a
 conversation

---
 ...ParticipantConversationDialogAction.class.php | 16 ++++++++++++++++
 .../command/AddParticipantConversation.class.php |  4 ++++
 2 files changed, 20 insertions(+)

diff --git a/files/lib/action/AddParticipantConversationDialogAction.class.php b/files/lib/action/AddParticipantConversationDialogAction.class.php
index d9d18d16..92194984 100644
--- a/files/lib/action/AddParticipantConversationDialogAction.class.php
+++ b/files/lib/action/AddParticipantConversationDialogAction.class.php
@@ -79,6 +79,8 @@ public function handle(ServerRequestInterface $request): ResponseInterface
                 );
             }
 
+            $participants = $this->filterOutParticipantsAlreadyAdded($participants, $conversation);
+
             (new AddParticipantConversation($conversation, $participants, $messageVisibility))();
 
             return new JsonResponse([]);
@@ -87,6 +89,20 @@ public function handle(ServerRequestInterface $request): ResponseInterface
         }
     }
 
+    /**
+     * @param int[] $participants
+     *
+     * @return int[]
+     */
+    private function filterOutParticipantsAlreadyAdded(array $participants, Conversation $conversation): array
+    {
+        $alreadyParticipantIDs = $conversation->getParticipantIDs(true);
+
+        return \array_filter($participants, static function (int $userID) use ($alreadyParticipantIDs): bool {
+            return !\in_array($userID, $alreadyParticipantIDs, true);
+        });
+    }
+
     private function getForm(Conversation $conversation): Psr15DialogForm
     {
         $form = new Psr15DialogForm(
diff --git a/files/lib/system/conversation/command/AddParticipantConversation.class.php b/files/lib/system/conversation/command/AddParticipantConversation.class.php
index e650b30e..f36f9210 100644
--- a/files/lib/system/conversation/command/AddParticipantConversation.class.php
+++ b/files/lib/system/conversation/command/AddParticipantConversation.class.php
@@ -32,6 +32,10 @@ public function __construct(
 
     public function __invoke(): void
     {
+        if ($this->participants === []) {
+            return;
+        }
+
         if ($this->conversation->isDraft) {
             $draftData = \unserialize($this->conversation->draftData);
             $draftData['participants'] = \array_merge($draftData['participants'], $this->participants);

From 8af7dffc5a40d78223754a0c362ebeec872cd76f Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Fri, 27 Jun 2025 08:53:21 +0200
Subject: [PATCH 17/24] Remove unused language items

---
 language/de.xml |  9 +++++++++
 language/en.xml | 20 +++++++++-----------
 2 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/language/de.xml b/language/de.xml
index 22bbe406..c58d93a4 100644
--- a/language/de.xml
+++ b/language/de.xml
@@ -289,5 +289,14 @@
 	<item name="wcf.user.usersOnline.location.ConversationPage"/>
 	<item name="wcf.conversation.hideConversation.leave.description"/>
 	<item name="wcf.conversation.hideConversation.leavePermanently.description"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.assignLabel"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.close"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.leave"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.leavePermanently"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.markAsRead"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.markAsRead.confirmMessage"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.open"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.restore"/>
+	<item name="wcf.clipboard.label.com.woltlab.wcf.conversation.conversation.marked"/>
 </delete>
 </language>
diff --git a/language/en.xml b/language/en.xml
index c11d09d9..9bc45d5a 100644
--- a/language/en.xml
+++ b/language/en.xml
@@ -60,17 +60,6 @@
 		<item name="wcf.acp.stat.com.woltlab.wcf.conversation.message"><![CDATA[Conversation Messages]]></item>
 		<item name="wcf.acp.stat.category.com.woltlab.wcf.conversation"><![CDATA[Conversations]]></item>
 	</category>
-	<category name="wcf.clipboard">
-		<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.assignLabel"><![CDATA[Assign Label ({#$count})]]></item>
-		<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.close"><![CDATA[Close for Replies ({#$count})]]></item>
-		<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.leave"><![CDATA[Hide ({#$count})]]></item>
-		<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.leavePermanently"><![CDATA[Leave ({#$count})]]></item>
-		<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.markAsRead"><![CDATA[Mark as Read ({#$count})]]></item>
-		<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.markAsRead.confirmMessage"><![CDATA[Do you really want to mark the marked conversation{if $count != 1}s{/if} as read?]]></item>
-		<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.open"><![CDATA[Open ({#$count})]]></item>
-		<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.restore"><![CDATA[Mark as Active ({#$count})]]></item>
-		<item name="wcf.clipboard.label.com.woltlab.wcf.conversation.conversation.marked"><![CDATA[{if $count == 1}One Conversation{else}{#$count} Conversations{/if}]]></item>
-	</category>
 	<category name="wcf.conversation">
 		<item name="wcf.conversation.add"><![CDATA[Create Conversation]]></item>
 		<item name="wcf.conversation.button.add"><![CDATA[Create Conversation]]></item>
@@ -280,5 +269,14 @@
 	<item name="wcf.user.usersOnline.location.ConversationPage"/>
 	<item name="wcf.conversation.hideConversation.leave.description"/>
 	<item name="wcf.conversation.hideConversation.leavePermanently.description"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.assignLabel"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.close"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.leave"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.leavePermanently"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.markAsRead"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.markAsRead.confirmMessage"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.open"/>
+	<item name="wcf.clipboard.item.com.woltlab.wcf.conversation.conversation.restore"/>
+	<item name="wcf.clipboard.label.com.woltlab.wcf.conversation.conversation.marked"/>
 </delete>
 </language>

From 5fc16bdaaab274f542c847ca2939ef4ab49908d7 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Fri, 27 Jun 2025 09:02:43 +0200
Subject: [PATCH 18/24] Add "Mark All as Read" button

---
 templates/conversationList.tpl | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/templates/conversationList.tpl b/templates/conversationList.tpl
index b2f605a4..7755152f 100644
--- a/templates/conversationList.tpl
+++ b/templates/conversationList.tpl
@@ -76,6 +76,12 @@
 	{event name='boxes'}
 {/capture}
 
+{capture assign='contentInteractionButtons'}
+	{if $__wcf->user->userID}
+		<button type="button" class="markAllAsReadButton contentInteractionButton button small jsOnly">{icon name='check'} <span>{lang}wcf.global.button.markAllAsRead{/lang}</span></button>
+	{/if}
+{/capture}
+
 {capture assign='contentInteractionDropdownItems'}
 	<li><a rel="alternate" href="{link controller='ConversationRssFeed'}at={$__wcf->getUser()->userID}-{$__wcf->getUser()->accessToken}{/link}">{lang}wcf.global.button.rss{/lang}</a></li>
 {/capture}
@@ -86,4 +92,13 @@
 	{unsafe:$listView->render()}
 </div>
 
+
+{if $__wcf->user->userID}
+	<script data-relocate="true">
+	require(['WoltLabSuite/Core/Conversation/Ui/MarkAllAsRead'], ({ setup }) => {
+		setup();
+	});
+	</script>
+{/if}
+
 {include file='footer'}

From e3c652e5a6b24c75b01d6bba0c6523adddb06da8 Mon Sep 17 00:00:00 2001
From: Olaf Braun <olaf_schmitz_1@t-online.de>
Date: Mon, 30 Jun 2025 16:18:13 +0200
Subject: [PATCH 19/24] Apply suggestions from code review

Co-authored-by: Marcel Werk <burntime@woltlab.com>
---
 files/lib/data/conversation/label/ConversationLabel.class.php   | 2 +-
 .../bulk/user/ConversationBulkInteractionCollecting.class.php   | 2 +-
 .../user/ConversationInteractionCollecting.class.php            | 2 +-
 .../listView/user/ConversationListViewInitialized.class.php     | 2 +-
 templates/conversationContentHeaderTitle.tpl                    | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/files/lib/data/conversation/label/ConversationLabel.class.php b/files/lib/data/conversation/label/ConversationLabel.class.php
index 3330d4e3..c5c4d9c6 100644
--- a/files/lib/data/conversation/label/ConversationLabel.class.php
+++ b/files/lib/data/conversation/label/ConversationLabel.class.php
@@ -68,7 +68,7 @@ public static function getLabelCssClassNames()
 
     public function render(): string
     {
-        $cssClassName = $this->cssClassName ? ' ' . $this->cssClassName : '';
+        $cssClassName = StringUtil::encodeHTML($this->cssClassName ? ' ' . $this->cssClassName : '');
         $title = StringUtil::encodeHTML($this->label);
 
         return <<<HTML
diff --git a/files/lib/event/interaction/bulk/user/ConversationBulkInteractionCollecting.class.php b/files/lib/event/interaction/bulk/user/ConversationBulkInteractionCollecting.class.php
index a22a1c39..d05cd31d 100644
--- a/files/lib/event/interaction/bulk/user/ConversationBulkInteractionCollecting.class.php
+++ b/files/lib/event/interaction/bulk/user/ConversationBulkInteractionCollecting.class.php
@@ -15,7 +15,7 @@
  */
 final class ConversationBulkInteractionCollecting implements IPsr14Event
 {
-    public function __construct(public readonly ConversationBulkInteractions $param)
+    public function __construct(public readonly ConversationBulkInteractions $provider)
     {
     }
 }
diff --git a/files/lib/event/interaction/user/ConversationInteractionCollecting.class.php b/files/lib/event/interaction/user/ConversationInteractionCollecting.class.php
index 9cebaf27..9291f3fe 100644
--- a/files/lib/event/interaction/user/ConversationInteractionCollecting.class.php
+++ b/files/lib/event/interaction/user/ConversationInteractionCollecting.class.php
@@ -15,7 +15,7 @@
  */
 final class ConversationInteractionCollecting implements IPsr14Event
 {
-    public function __construct(public readonly ConversationInteractions $param)
+    public function __construct(public readonly ConversationInteractions $provider)
     {
     }
 }
diff --git a/files/lib/event/listView/user/ConversationListViewInitialized.class.php b/files/lib/event/listView/user/ConversationListViewInitialized.class.php
index 8a279ee2..2c274e7f 100644
--- a/files/lib/event/listView/user/ConversationListViewInitialized.class.php
+++ b/files/lib/event/listView/user/ConversationListViewInitialized.class.php
@@ -15,7 +15,7 @@
  */
 final class ConversationListViewInitialized implements IPsr14Event
 {
-    public function __construct(public readonly ConversationListView $param)
+    public function __construct(public readonly ConversationListView $provider)
     {
     }
 }
diff --git a/templates/conversationContentHeaderTitle.tpl b/templates/conversationContentHeaderTitle.tpl
index fe183db8..95c30394 100644
--- a/templates/conversationContentHeaderTitle.tpl
+++ b/templates/conversationContentHeaderTitle.tpl
@@ -1,5 +1,5 @@
 <div class="contentHeaderTitle">
-	<h1 class="contentTitle jsConversationSubject" data-conversation-id="{$conversation->conversationID}">{$conversation->subject}</h1>
+	<h1 class="contentTitle">{$conversation->subject}</h1>
 
 	<ul class="inlineList contentHeaderMetaData">
 		{hascontent}

From b35b65569789f1a02f814029ce4abc8afd03d6fc Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Mon, 30 Jun 2025 16:19:40 +0200
Subject: [PATCH 20/24] Remove conversation Subject Editor

---
 fileDelete.xml                                |   1 +
 .../Core/Conversation/Ui/Subject/Editor.js    | 106 -------------
 .../Core/Conversation/Ui/Subject/Editor.ts    | 142 ------------------
 3 files changed, 1 insertion(+), 248 deletions(-)
 delete mode 100644 files/js/WoltLabSuite/Core/Conversation/Ui/Subject/Editor.js
 delete mode 100644 ts/WoltLabSuite/Core/Conversation/Ui/Subject/Editor.ts

diff --git a/fileDelete.xml b/fileDelete.xml
index f90340b6..0577d1b5 100644
--- a/fileDelete.xml
+++ b/fileDelete.xml
@@ -32,6 +32,7 @@
 		<file>js/WoltLabSuite/Core/Conversation/Component/Leave.js</file>
 		<file>js/WoltLabSuite/Core/Conversation/Component/Label/Editor.js</file>
 		<file>js/WoltLabSuite/Core/Conversation/Component/Label/Manager.js</file>
+		<file>js/WoltLabSuite/Core/Conversation/Component/Subject/Editor.js</file>
 		<file>js/WoltLabSuite/Core/Conversation/Clipboard.js</file>
 		<file>js/WoltLabSuite/Core/Conversation/Ui/Participant/Add.js</file>
 		<file>js/WoltLabSuite/Core/Conversation/Ui/Object/Action/RemoveParticipant.js</file>
diff --git a/files/js/WoltLabSuite/Core/Conversation/Ui/Subject/Editor.js b/files/js/WoltLabSuite/Core/Conversation/Ui/Subject/Editor.js
deleted file mode 100644
index 63d2bd8b..00000000
--- a/files/js/WoltLabSuite/Core/Conversation/Ui/Subject/Editor.js
+++ /dev/null
@@ -1,106 +0,0 @@
-define(["require", "exports", "tslib", "WoltLabSuite/Core/Ui/Dialog", "WoltLabSuite/Core/Dom/Util", "WoltLabSuite/Core/Ajax", "WoltLabSuite/Core/Language", "WoltLabSuite/Core/Component/Snackbar"], function (require, exports, tslib_1, Dialog_1, Util_1, Ajax, Language, Snackbar_1) {
-    "use strict";
-    Object.defineProperty(exports, "__esModule", { value: true });
-    exports.beginEdit = beginEdit;
-    Dialog_1 = tslib_1.__importDefault(Dialog_1);
-    Util_1 = tslib_1.__importDefault(Util_1);
-    Ajax = tslib_1.__importStar(Ajax);
-    Language = tslib_1.__importStar(Language);
-    class UiSubjectEditor {
-        objectId;
-        subject;
-        constructor(objectId) {
-            this.objectId = objectId;
-        }
-        /**
-         * Shows the subject editor dialog.
-         */
-        show() {
-            Dialog_1.default.open(this);
-        }
-        /**
-         * Validates and saves the new subject.
-         */
-        saveEdit(event) {
-            event.preventDefault();
-            const value = this.subject.value.trim();
-            if (value === "") {
-                Util_1.default.innerError(this.subject, Language.get("wcf.global.form.error.empty"));
-            }
-            else {
-                Util_1.default.innerError(this.subject, "");
-                Ajax.api(this, {
-                    parameters: {
-                        subject: value,
-                    },
-                    objectIDs: [this.objectId],
-                });
-            }
-        }
-        /**
-         * Returns the current conversation subject.
-         */
-        getCurrentValue() {
-            return Array.from(document.querySelectorAll(`.jsConversationSubject[data-conversation-id="${this.objectId}"], .conversationLink[data-object-id="${this.objectId}"]`))
-                .map((subject) => subject.textContent)
-                .slice(-1)[0];
-        }
-        _ajaxSuccess(data) {
-            Dialog_1.default.close(this);
-            document
-                .querySelectorAll(`.jsConversationSubject[data-conversation-id="${this.objectId}"], .conversationLink[data-object-id="${this.objectId}"]`)
-                .forEach((subject) => {
-                subject.textContent = data.returnValues.subject;
-            });
-            (0, Snackbar_1.showDefaultSuccessSnackbar)();
-        }
-        _dialogSetup() {
-            return {
-                id: "dialogConversationSubjectEditor",
-                options: {
-                    onSetup: (content) => {
-                        this.subject = document.getElementById("jsConversationSubject");
-                        this.subject.addEventListener("keyup", (ev) => {
-                            if (ev.key === "Enter") {
-                                this.saveEdit(ev);
-                            }
-                        });
-                        content.querySelector(".jsButtonSave").addEventListener("click", (ev) => {
-                            this.saveEdit(ev);
-                        });
-                    },
-                    onShow: () => {
-                        this.subject.value = this.getCurrentValue();
-                    },
-                    title: Language.get("wcf.conversation.edit.subject"),
-                },
-                source: `
-        <dl>
-          <dt>
-            <label for="jsConversationSubject">${Language.get("wcf.global.subject")}</label>
-          </dt>
-          <dd>
-            <input type="text" id="jsConversationSubject" class="long" maxlength="255">
-          </dd>
-        </dl>
-        <div class="formSubmit">
-          <button type="button" class="button buttonPrimary jsButtonSave">${Language.get("wcf.global.button.save")}</button>
-        </div>
-      `,
-            };
-        }
-        _ajaxSetup() {
-            return {
-                data: {
-                    actionName: "editSubject",
-                    className: "wcf\\data\\conversation\\ConversationAction",
-                },
-            };
-        }
-    }
-    let editor;
-    function beginEdit(objectId) {
-        editor = new UiSubjectEditor(objectId);
-        editor.show();
-    }
-});
diff --git a/ts/WoltLabSuite/Core/Conversation/Ui/Subject/Editor.ts b/ts/WoltLabSuite/Core/Conversation/Ui/Subject/Editor.ts
deleted file mode 100644
index d241c16a..00000000
--- a/ts/WoltLabSuite/Core/Conversation/Ui/Subject/Editor.ts
+++ /dev/null
@@ -1,142 +0,0 @@
-/**
- * Provides the editor for conversation subjects.
- *
- * @author  Alexander Ebert
- * @copyright   2001-2021 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- */
-import { DialogCallbackObject } from "WoltLabSuite/Core/Ui/Dialog/Data";
-import UiDialog from "WoltLabSuite/Core/Ui/Dialog";
-import DomUtil from "WoltLabSuite/Core/Dom/Util";
-import * as Ajax from "WoltLabSuite/Core/Ajax";
-import * as Language from "WoltLabSuite/Core/Language";
-import { AjaxCallbackObject, ResponseData } from "WoltLabSuite/Core/Ajax/Data";
-import { showDefaultSuccessSnackbar } from "WoltLabSuite/Core/Component/Snackbar";
-import { DialogCallbackSetup } from "WoltLabSuite/Core/Ui/Dialog/Data";
-import { AjaxCallbackSetup } from "WoltLabSuite/Core/Ajax/Data";
-
-interface AjaxResponseData extends ResponseData {
-  returnValues: {
-    subject: string;
-  };
-}
-
-class UiSubjectEditor implements AjaxCallbackObject, DialogCallbackObject {
-  private readonly objectId: number;
-  private subject: HTMLInputElement;
-
-  constructor(objectId: number) {
-    this.objectId = objectId;
-  }
-
-  /**
-   * Shows the subject editor dialog.
-   */
-  public show(): void {
-    UiDialog.open(this);
-  }
-
-  /**
-   * Validates and saves the new subject.
-   */
-  protected saveEdit(event: Event) {
-    event.preventDefault();
-
-    const value = this.subject.value.trim();
-    if (value === "") {
-      DomUtil.innerError(this.subject, Language.get("wcf.global.form.error.empty"));
-    } else {
-      DomUtil.innerError(this.subject, "");
-
-      Ajax.api(this, {
-        parameters: {
-          subject: value,
-        },
-        objectIDs: [this.objectId],
-      });
-    }
-  }
-
-  /**
-   * Returns the current conversation subject.
-   */
-  protected getCurrentValue(): string {
-    return Array.from(
-      document.querySelectorAll(
-        `.jsConversationSubject[data-conversation-id="${this.objectId}"], .conversationLink[data-object-id="${this.objectId}"]`,
-      ),
-    )
-      .map((subject: HTMLElement) => subject.textContent!)
-      .slice(-1)[0];
-  }
-
-  _ajaxSuccess(data: AjaxResponseData) {
-    UiDialog.close(this);
-
-    document
-      .querySelectorAll(
-        `.jsConversationSubject[data-conversation-id="${this.objectId}"], .conversationLink[data-object-id="${this.objectId}"]`,
-      )
-      .forEach((subject) => {
-        subject.textContent = data.returnValues.subject;
-      });
-
-    showDefaultSuccessSnackbar();
-  }
-
-  _dialogSetup(): ReturnType<DialogCallbackSetup> {
-    return {
-      id: "dialogConversationSubjectEditor",
-      options: {
-        onSetup: (content) => {
-          this.subject = document.getElementById("jsConversationSubject") as HTMLInputElement;
-          this.subject.addEventListener("keyup", (ev) => {
-            if (ev.key === "Enter") {
-              this.saveEdit(ev);
-            }
-          });
-
-          content.querySelector(".jsButtonSave")!.addEventListener("click", (ev) => {
-            this.saveEdit(ev);
-          });
-        },
-        onShow: () => {
-          this.subject.value = this.getCurrentValue();
-        },
-        title: Language.get("wcf.conversation.edit.subject"),
-      },
-      source: `
-        <dl>
-          <dt>
-            <label for="jsConversationSubject">${Language.get("wcf.global.subject")}</label>
-          </dt>
-          <dd>
-            <input type="text" id="jsConversationSubject" class="long" maxlength="255">
-          </dd>
-        </dl>
-        <div class="formSubmit">
-          <button type="button" class="button buttonPrimary jsButtonSave">${Language.get(
-            "wcf.global.button.save",
-          )}</button>
-        </div>
-      `,
-    };
-  }
-
-  _ajaxSetup(): ReturnType<AjaxCallbackSetup> {
-    return {
-      data: {
-        actionName: "editSubject",
-        className: "wcf\\data\\conversation\\ConversationAction",
-      },
-    };
-  }
-}
-
-let editor: UiSubjectEditor;
-
-export function beginEdit(objectId: number): void {
-  editor = new UiSubjectEditor(objectId);
-
-  editor.show();
-}

From 5559b331feb881c9516af9ddfa7a57387c29c699 Mon Sep 17 00:00:00 2001
From: Olaf Braun <olaf_schmitz_1@t-online.de>
Date: Mon, 30 Jun 2025 16:33:05 +0200
Subject: [PATCH 21/24] Update
 files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php

Co-authored-by: Marcel Werk <burntime@woltlab.com>
---
 .../controller/core/conversations/CloseConversation.class.php   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php b/files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php
index f3fc2f09..9c53e2b9 100644
--- a/files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php
+++ b/files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php
@@ -49,7 +49,7 @@ private function assertConversationCanClosed(Conversation $conversation): void
         }
     }
 
-    private function openConversation(Conversation $conversation): void
+    private function closeConversation(Conversation $conversation): void
     {
         $editor = new ConversationEditor($conversation);
         $editor->update(['isClosed' => 1]);

From 7cc279e43ddf93097719bb8f778882a24f492550 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Mon, 30 Jun 2025 16:35:44 +0200
Subject: [PATCH 22/24] Move static function from `ConversationAddForm` into
 the new trait `TConversationForm`

---
 ...ticipantConversationDialogAction.class.php |  10 +-
 files/lib/form/ConversationAddForm.class.php  | 139 ++---------------
 .../conversation/TConversationForm.class.php  | 142 ++++++++++++++++++
 3 files changed, 157 insertions(+), 134 deletions(-)
 create mode 100644 files/lib/system/conversation/TConversationForm.class.php

diff --git a/files/lib/action/AddParticipantConversationDialogAction.class.php b/files/lib/action/AddParticipantConversationDialogAction.class.php
index 92194984..a59f10a3 100644
--- a/files/lib/action/AddParticipantConversationDialogAction.class.php
+++ b/files/lib/action/AddParticipantConversationDialogAction.class.php
@@ -9,10 +9,10 @@
 use Psr\Http\Server\RequestHandlerInterface;
 use wcf\data\conversation\Conversation;
 use wcf\data\user\group\UserGroup;
-use wcf\form\ConversationAddForm;
 use wcf\http\Helper;
 use wcf\system\cache\builder\UserGroupCacheBuilder;
 use wcf\system\conversation\command\AddParticipantConversation;
+use wcf\system\conversation\TConversationForm;
 use wcf\system\exception\IllegalLinkException;
 use wcf\system\exception\PermissionDeniedException;
 use wcf\system\form\builder\field\BooleanFormField;
@@ -33,6 +33,8 @@
  */
 final class AddParticipantConversationDialogAction implements RequestHandlerInterface
 {
+    use TConversationForm;
+
     #[\Override]
     public function handle(ServerRequestInterface $request): ResponseInterface
     {
@@ -74,7 +76,7 @@ public function handle(ServerRequestInterface $request): ResponseInterface
                 $participants = \array_unique(
                     \array_merge(
                         $participants,
-                        ConversationAddForm::getUserByGroups($groupIDs)
+                        $this->getUserByGroups($groupIDs)
                     )
                 );
             }
@@ -123,8 +125,8 @@ private function getForm(Conversation $conversation): Psr15DialogForm
                 ->maximumMultiples(WCF::getSession()->getPermission('user.conversation.maxParticipants'))
                 ->multiple()
                 ->maximumMultiples(WCF::getSession()->getPermission('user.conversation.maxParticipants') - $conversation->participants)
-                ->addValidator(ConversationAddForm::getParticipantsValidator())
-                ->addValidator(ConversationAddForm::getMaximumParticipantsValidator(invisibleParticipantGroupsFieldId: null)),
+                ->addValidator($this->getParticipantsValidator())
+                ->addValidator($this->getMaximumParticipantsValidator(invisibleParticipantGroupsFieldId: null)),
             BooleanFormField::create('addGroupParticipants')
                 ->label('wcf.conversation.addGroupParticipants')
                 ->available(\count($groupParticipants) > 0),
diff --git a/files/lib/form/ConversationAddForm.class.php b/files/lib/form/ConversationAddForm.class.php
index 91f21a79..3610452c 100644
--- a/files/lib/form/ConversationAddForm.class.php
+++ b/files/lib/form/ConversationAddForm.class.php
@@ -8,8 +8,7 @@
 use wcf\data\user\group\UserGroup;
 use wcf\system\cache\builder\UserGroupCacheBuilder;
 use wcf\system\cache\runtime\UserProfileRuntimeCache;
-use wcf\system\database\util\PreparedStatementConditionBuilder;
-use wcf\system\exception\UserInputException;
+use wcf\system\conversation\TConversationForm;
 use wcf\system\flood\FloodControl;
 use wcf\system\form\builder\container\FormContainer;
 use wcf\system\form\builder\container\wysiwyg\WysiwygFormContainer;
@@ -24,7 +23,6 @@
 use wcf\system\form\builder\field\validation\FormFieldValidator;
 use wcf\system\form\builder\IFormDocument;
 use wcf\system\page\PageLocationManager;
-use wcf\system\user\storage\UserStorageHandler;
 use wcf\system\WCF;
 use wcf\util\HeaderUtil;
 
@@ -39,6 +37,8 @@
  */
 class ConversationAddForm extends AbstractFormBuilderForm
 {
+    use TConversationForm;
+
     /**
      * @inheritDoc
      */
@@ -101,8 +101,8 @@ static function (UserGroup $group) {
                         ->label('wcf.conversation.participants')
                         ->description('wcf.conversation.participants.description')
                         ->maximumMultiples(WCF::getSession()->getPermission('user.conversation.maxParticipants'))
-                        ->addValidator(self::getParticipantsValidator())
-                        ->addValidator(self::getMaximumParticipantsValidator()),
+                        ->addValidator($this->getParticipantsValidator())
+                        ->addValidator($this->getMaximumParticipantsValidator()),
                     BooleanFormField::create('addGroupParticipants')
                         ->label('wcf.conversation.addGroupParticipants')
                         ->available(\count($groupParticipants) > 0),
@@ -120,7 +120,7 @@ static function (UserGroup $group) {
                         ->description('wcf.conversation.invisibleParticipants.description')
                         ->available(WCF::getSession()->getPermission('user.conversation.canAddInvisibleParticipants'))
                         ->maximumMultiples(WCF::getSession()->getPermission('user.conversation.maxParticipants'))
-                        ->addValidator(self::getParticipantsValidator())
+                        ->addValidator($this->getParticipantsValidator())
                         ->addValidator(
                             new FormFieldValidator(
                                 'duplicateParticipantsValidator',
@@ -219,7 +219,7 @@ protected function finalizeForm()
             ->addProcessor(
                 new CustomFormDataProcessor(
                     'participantsProcessor',
-                    static function (IFormDocument $document, array $parameters) {
+                    function (IFormDocument $document, array $parameters) {
                         $participants = $parameters['participants'] ?? [];
                         $invisibleParticipants = $parameters['invisibleParticipants'] ?? [];
 
@@ -228,14 +228,14 @@ static function (IFormDocument $document, array $parameters) {
                             $participants = \array_unique(
                                 \array_merge(
                                     $participants,
-                                    ConversationAddForm::getUserByGroups($groupIDs)
+                                    $this->getUserByGroups($groupIDs)
                                 )
                             );
                         }
 
                         if (isset($parameters['invisibleParticipantGroups'])) {
                             $groupIDs = $parameters['invisibleParticipantGroups'];
-                            $userIDs = ConversationAddForm::getUserByGroups($groupIDs);
+                            $userIDs = $this->getUserByGroups($groupIDs);
 
                             $invisibleParticipants = \array_unique(
                                 \array_merge(
@@ -306,125 +306,4 @@ public function saved()
 
         exit;
     }
-
-    /**
-     * Returns a validator that checks if the selected participants are valid.
-     *
-     * @since 6.2
-     */
-    public static function getParticipantsValidator(): FormFieldValidator
-    {
-        return new FormFieldValidator('participantsValidator', static function (UserFormField $formField) {
-            $users = $formField->getUsers();
-            $userIDs = \array_column($users, 'userID');
-
-            UserStorageHandler::getInstance()->loadStorage($userIDs);
-
-            foreach ($users as $user) {
-                try {
-                    if ($user->userID === WCF::getUser()->userID) {
-                        throw new UserInputException('isAuthor');
-                    }
-
-                    Conversation::validateParticipant($user, $formField->getId());
-                } catch (UserInputException $e) {
-                    $formField->addValidationError(
-                        new FormFieldValidationError(
-                            $e->getType(),
-                            'wcf.conversation.participants.error.' . $e->getType(),
-                            [
-                                'username' => $user->username,
-                            ]
-                        )
-                    );
-                }
-            }
-        });
-    }
-
-    /**
-     * Returns a validator that checks if the maximum number of participants is not exceeded.
-     *
-     * @since 6.2
-     */
-    public static function getMaximumParticipantsValidator(
-        string $invisibleParticipantsFieldId = 'invisibleParticipants',
-        string $participantGroupsFieldId = 'participantGroups',
-        ?string $invisibleParticipantGroupsFieldId = 'invisibleParticipantGroups'
-    ): FormFieldValidator {
-        return new FormFieldValidator(
-            'participantsMaximumValidator',
-            static function (UserFormField $formField) use (
-                $invisibleParticipantsFieldId,
-                $participantGroupsFieldId,
-                $invisibleParticipantGroupsFieldId
-            ) {
-                $invisibleParticipantsFormField = $formField->getDocument()
-                    ->getNodeById($invisibleParticipantsFieldId);
-                $participantGroupsFormField = $formField->getDocument()
-                    ->getNodeById($participantGroupsFieldId);
-                $isDraftFormField = $formField->getDocument()->getNodeById('isDraft');
-                $invisibleParticipantGroupsFormField = $invisibleParticipantGroupsFieldId !== null ? $formField->getDocument()
-                    ->getNodeById($invisibleParticipantGroupsFieldId) : null;
-
-                \assert($invisibleParticipantsFormField === null || $invisibleParticipantsFormField instanceof UserFormField);
-                \assert($isDraftFormField === null || $isDraftFormField instanceof BooleanFormField);
-                \assert($participantGroupsFormField === null || $participantGroupsFormField instanceof MultipleSelectionFormField);
-                \assert($invisibleParticipantGroupsFormField === null || $invisibleParticipantGroupsFormField instanceof MultipleSelectionFormField);
-
-                $groupIDs = \array_merge(
-                    $participantGroupsFormField?->getValue() ?: [],
-                    $invisibleParticipantGroupsFormField?->getValue() ?: [],
-                );
-
-                $userIDs = \array_merge(
-                    \array_column($formField->getUsers(), 'userID'),
-                    \array_column($invisibleParticipantsFormField?->getUsers() ?: [], 'userID'),
-                    ConversationAddForm::getUserByGroups($groupIDs)
-                );
-
-                if (\count($userIDs) > WCF::getSession()->getPermission('user.conversation.maxParticipants')) {
-                    $formField->addValidationError(
-                        new FormFieldValidationError(
-                            'tooManyParticipants',
-                            'wcf.conversation.participants.error.tooManyParticipants'
-                        )
-                    );
-                }
-
-                if (!$isDraftFormField?->getValue() && $userIDs === []) {
-                    $formField->addValidationError(new FormFieldValidationError('empty'));
-                }
-            }
-        );
-    }
-
-    /**
-     * Returns the user IDs of the users that are in the given groups.
-     *
-     * @param int[] $groupIDs
-     *
-     * @return int[]
-     */
-    public static function getUserByGroups(array $groupIDs): array
-    {
-        if ($groupIDs === []) {
-            return [];
-        }
-
-        $conditionBuilder = new PreparedStatementConditionBuilder();
-        $conditionBuilder->add('groupID IN (?)', [$groupIDs]);
-        $sql = "SELECT  DISTINCT userID
-                FROM    wcf1_user_to_group
-                " . $conditionBuilder;
-        $statement = WCF::getDB()->prepare($sql);
-        $statement->execute($conditionBuilder->getParameters());
-
-        $userIDs = [];
-        while ($userID = $statement->fetchColumn()) {
-            $userIDs[] = $userID;
-        }
-
-        return $userIDs;
-    }
 }
diff --git a/files/lib/system/conversation/TConversationForm.class.php b/files/lib/system/conversation/TConversationForm.class.php
new file mode 100644
index 00000000..20a7d61a
--- /dev/null
+++ b/files/lib/system/conversation/TConversationForm.class.php
@@ -0,0 +1,142 @@
+<?php
+
+namespace wcf\system\conversation;
+
+use wcf\data\conversation\Conversation;
+use wcf\system\database\util\PreparedStatementConditionBuilder;
+use wcf\system\exception\UserInputException;
+use wcf\system\form\builder\field\BooleanFormField;
+use wcf\system\form\builder\field\MultipleSelectionFormField;
+use wcf\system\form\builder\field\user\UserFormField;
+use wcf\system\form\builder\field\validation\FormFieldValidationError;
+use wcf\system\form\builder\field\validation\FormFieldValidator;
+use wcf\system\user\storage\UserStorageHandler;
+use wcf\system\WCF;
+
+/**
+ * Provides methods that can be used in conversation form builder forms.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+trait TConversationForm
+{
+    /**
+     * Returns the user IDs of the users that are in the given groups.
+     *
+     * @param int[] $groupIDs
+     *
+     * @return int[]
+     */
+    protected function getUserByGroups(array $groupIDs): array
+    {
+        if ($groupIDs === []) {
+            return [];
+        }
+
+        $conditionBuilder = new PreparedStatementConditionBuilder();
+        $conditionBuilder->add('groupID IN (?)', [$groupIDs]);
+        $sql = "SELECT  DISTINCT userID
+                FROM    wcf1_user_to_group
+                " . $conditionBuilder;
+        $statement = WCF::getDB()->prepare($sql);
+        $statement->execute($conditionBuilder->getParameters());
+
+        $userIDs = [];
+        while ($userID = $statement->fetchColumn()) {
+            $userIDs[] = $userID;
+        }
+
+        return $userIDs;
+    }
+
+    /**
+     * Returns a validator that checks if the selected participants are valid.
+     */
+    protected function getParticipantsValidator(): FormFieldValidator
+    {
+        return new FormFieldValidator('participantsValidator', static function (UserFormField $formField) {
+            $users = $formField->getUsers();
+            $userIDs = \array_column($users, 'userID');
+
+            UserStorageHandler::getInstance()->loadStorage($userIDs);
+
+            foreach ($users as $user) {
+                try {
+                    if ($user->userID === WCF::getUser()->userID) {
+                        throw new UserInputException('isAuthor');
+                    }
+
+                    Conversation::validateParticipant($user, $formField->getId());
+                } catch (UserInputException $e) {
+                    $formField->addValidationError(
+                        new FormFieldValidationError(
+                            $e->getType(),
+                            'wcf.conversation.participants.error.' . $e->getType(),
+                            [
+                                'username' => $user->username,
+                            ]
+                        )
+                    );
+                }
+            }
+        });
+    }
+
+    /**
+     * Returns a validator that checks if the maximum number of participants is not exceeded.
+     */
+    protected function getMaximumParticipantsValidator(
+        string $invisibleParticipantsFieldId = 'invisibleParticipants',
+        string $participantGroupsFieldId = 'participantGroups',
+        ?string $invisibleParticipantGroupsFieldId = 'invisibleParticipantGroups'
+    ): FormFieldValidator {
+        return new FormFieldValidator(
+            'participantsMaximumValidator',
+            function (UserFormField $formField) use (
+                $invisibleParticipantsFieldId,
+                $participantGroupsFieldId,
+                $invisibleParticipantGroupsFieldId
+            ) {
+                $invisibleParticipantsFormField = $formField->getDocument()
+                    ->getNodeById($invisibleParticipantsFieldId);
+                $participantGroupsFormField = $formField->getDocument()
+                    ->getNodeById($participantGroupsFieldId);
+                $isDraftFormField = $formField->getDocument()->getNodeById('isDraft');
+                $invisibleParticipantGroupsFormField = $invisibleParticipantGroupsFieldId !== null ? $formField->getDocument()
+                    ->getNodeById($invisibleParticipantGroupsFieldId) : null;
+
+                \assert($invisibleParticipantsFormField === null || $invisibleParticipantsFormField instanceof UserFormField);
+                \assert($isDraftFormField === null || $isDraftFormField instanceof BooleanFormField);
+                \assert($participantGroupsFormField === null || $participantGroupsFormField instanceof MultipleSelectionFormField);
+                \assert($invisibleParticipantGroupsFormField === null || $invisibleParticipantGroupsFormField instanceof MultipleSelectionFormField);
+
+                $groupIDs = \array_merge(
+                    $participantGroupsFormField?->getValue() ?: [],
+                    $invisibleParticipantGroupsFormField?->getValue() ?: [],
+                );
+
+                $userIDs = \array_merge(
+                    \array_column($formField->getUsers(), 'userID'),
+                    \array_column($invisibleParticipantsFormField?->getUsers() ?: [], 'userID'),
+                    $this->getUserByGroups($groupIDs)
+                );
+
+                if (\count($userIDs) > WCF::getSession()->getPermission('user.conversation.maxParticipants')) {
+                    $formField->addValidationError(
+                        new FormFieldValidationError(
+                            'tooManyParticipants',
+                            'wcf.conversation.participants.error.tooManyParticipants'
+                        )
+                    );
+                }
+
+                if (!$isDraftFormField?->getValue() && $userIDs === []) {
+                    $formField->addValidationError(new FormFieldValidationError('empty'));
+                }
+            }
+        );
+    }
+}

From bea5ce107f90c24a3c308beecc701939a8251486 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Mon, 30 Jun 2025 16:36:41 +0200
Subject: [PATCH 23/24] Call correct function, to close the conversation

---
 .../controller/core/conversations/CloseConversation.class.php   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php b/files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php
index 9c53e2b9..5653c148 100644
--- a/files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php
+++ b/files/lib/system/endpoint/controller/core/conversations/CloseConversation.class.php
@@ -32,7 +32,7 @@ public function __invoke(ServerRequestInterface $request, array $variables): Res
         $this->assertConversationCanClosed($conversation);
 
         if (!$conversation->isClosed) {
-            $this->openConversation($conversation);
+            $this->closeConversation($conversation);
         }
 
         return new JsonResponse([]);

From a2290f6d2c9bbebbde1e6da005fa3b4fcaca6133 Mon Sep 17 00:00:00 2001
From: Cyperghost <olaf_schmitz_1@t-online.de>
Date: Mon, 30 Jun 2025 16:44:22 +0200
Subject: [PATCH 24/24] Double-Click on the avatar to mark a conversation as
 read.

---
 templates/conversationList.tpl      | 5 +++--
 templates/conversationListItems.tpl | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/templates/conversationList.tpl b/templates/conversationList.tpl
index 7755152f..8e37bfd2 100644
--- a/templates/conversationList.tpl
+++ b/templates/conversationList.tpl
@@ -95,8 +95,9 @@
 
 {if $__wcf->user->userID}
 	<script data-relocate="true">
-	require(['WoltLabSuite/Core/Conversation/Ui/MarkAllAsRead'], ({ setup }) => {
-		setup();
+	require(['WoltLabSuite/Core/Conversation/Ui/MarkAllAsRead', 'WoltLabSuite/Core/Conversation/Ui/MarkAsRead'], (MarkAllAsRead, MarkAsRead) => {
+		MarkAllAsRead.setup();
+		MarkAsRead.setup();
 	});
 	</script>
 {/if}
diff --git a/templates/conversationListItems.tpl b/templates/conversationListItems.tpl
index 2be39db1..008e76d7 100644
--- a/templates/conversationListItems.tpl
+++ b/templates/conversationListItems.tpl
@@ -1,6 +1,6 @@
 {foreach from=$view->getItems() item=conversation}
 	<div class="listView__item tabularListRow" data-object-id="{$conversation->getObjectID()}">
-		<ol class="tabularListColumns messageGroup conversation{if $conversation->isNew()} new{/if}">
+		<ol class="tabularListColumns messageGroup conversation{if $conversation->isNew()} new{/if}" data-conversation-id="{$conversation->conversationID}">
 			<li class="columnInteractions">
 				{if $view->hasBulkInteractions()}
 					<label class="button small jsTooltip" title="{lang}wcf.clipboard.item.mark{/lang}">