Unify Settings/dialog label casing to sentence case

Convert content strings (form/body labels, checkbox/radio labels, combobox
items, tooltips, placeholders) in the new-architecture Settings pages and
*Dialog2 dialogs from Title Case to sentence case. Buttons, window/dialog
titles, and settings page/section titles remain Title Case. Proper nouns,
acronyms, key names, and Personal Access Token/Remote URL keep their casing.

Update dialogs/AGENTS.md convention table accordingly and mark the
capitalization cleanup backlog as completed.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: tamlok

src/widgets/dialogs/AGENTS.md

@@ -16,7 +16,8 @@ VNote dialogs use a mixed capitalization scheme. The rules below are the project
 | **Window / dialog titles** (`setWindowTitle`, `QFileDialog` title) | **Title Case** | `"Open Notebook"`, `"Select Local Root Folder"`, `"Manage Notebooks"` |
 | **Tooltips** | sentence form, **end with a period** | `"Remote git URL. Only HTTPS and file:// schemes are supported."` |
 | **Banner / info-text messages** (`setInformationText`) | sentence form, **end with a period** | `"Local root folder must be empty (contains 3 item(s))."`, `"Cloning..."` |
-| **Radio button / checkbox labels** | **Title Case** | `"Local Folder"`, `"Remote URL"` |
+| **Radio button / checkbox labels** | **sentence case** | `"Local folder"`, `"Keep both"`, `"Expand Tab"` |
+| **ComboBox item labels** | **sentence case** (first word only) | `"Bundled notebook"`, `"No wrap"`, `"Web service"`, `"Local JAR"` |
 
 ### Why these rules
 
@@ -63,25 +64,19 @@ Use this pattern when the dialog has both keystroke-driven validation (noisy) an
 | `NewQuickAccessItemDialog` | (inline) | Add a quick-access entry (used inside Settings) |
 | `SnippetInfoWidget2` / snippet dialogs | `SnippetController` | Snippet metadata |
 
-## Known Inconsistencies (Cleanup Backlog)
+## Capitalization Cleanup (Completed)
 
-These labels violate the sentence-case convention and SHOULD be normalized in a focused follow-up plan. Listed here so a future contributor doesn't accidentally copy the wrong style:
+The sentence-case sweep across the new-architecture Settings pages
+(`settings/`, `settingswidget.cpp`) and the `*Dialog2` dialogs has been completed.
+Content strings — form labels, checkbox/radio labels, combobox items, group/section
+body labels, tooltips, and placeholders — use sentence case. Buttons, window/dialog
+titles, settings page titles, and `SettingsPageHelper::addSection` card titles remain
+Title Case. Proper nouns / product names (PlantUml, MathJax, Graphviz, VNote, Vi, Git),
+initialisms (URL, PAT, JSON, JAR, HTML, PDF), keyboard key names (Tab, Ctrl), and the
+established terms `Personal Access Token` and `Remote URL` keep their canonical casing.
 
-| File | Line | Current | Target |
-|---|---|---|---|
-| `newnotebookdialog2.cpp` | 72 | `"Root Folder:"` | `"Root folder:"` |
-| `newnotebookdialog2.cpp` | 107 | `"Sync Method:"` | `"Sync method:"` |
-| `newnotebookdialog2.cpp` | 169 | `"Assets Folder:"` | `"Assets folder:"` |
-| `managenotebooksdialog2.cpp` | 89 | `"Root Folder:"` | `"Root folder:"` |
-| `openvnote3notebookdialog2.cpp` | 35 | `"Source Folder:"` | `"Source folder:"` |
-| `openvnote3notebookdialog2.cpp` | 41 | `"Destination Folder:"` | `"Destination folder:"` |
-| `openvnote3notebookdialog2.cpp` | 43 | `"Notebook Name:"` | `"Notebook name:"` |
-| `notebooksyncinfodialog2.cpp` | 220 | `"Last Sync:"` | `"Last sync:"` |
-| `notebooksyncinfodialog2.cpp` | 226 | `"Current State:"` | `"Current state:"` |
-
-`"Personal Access Token:"` and `"Remote URL:"` are NOT in this list — they are correctly preserved per the proper-noun / initialism rules above.
-
-The cleanup should also update each dialog's translation `.ts` entries (`translations/`) and re-run `lupdate`. A single PR is fine because each change is a one-line label edit with no behavior change.
+Translation `.ts` files in `src/data/core/translations/` were intentionally left
+untouched; a future `lupdate` pass will refresh the source entries.
 
 ## Related Modules
 

src/widgets/dialogs/exportdialog2.cpp

@@ -93,30 +93,30 @@ QString sourceText(ExportSource p_source, const ExportContext &p_context) {
   switch (p_source) {
   case ExportSource::CurrentBuffer:
     if (!p_context.bufferName.isEmpty()) {
-      return ExportDialog2::tr("Current Buffer (%1)").arg(p_context.bufferName);
+      return ExportDialog2::tr("Current buffer (%1)").arg(p_context.bufferName);
     }
-    return ExportDialog2::tr("Current Buffer");
+    return ExportDialog2::tr("Current buffer");
 
   case ExportSource::CurrentNote:
     if (p_context.currentNodeId.isValid()) {
-      return ExportDialog2::tr("Current Note (%1)").arg(p_context.currentNodeId.relativePath);
+      return ExportDialog2::tr("Current note (%1)").arg(p_context.currentNodeId.relativePath);
     }
-    return ExportDialog2::tr("Current Note");
+    return ExportDialog2::tr("Current note");
 
   case ExportSource::CurrentFolder:
     if (p_context.currentFolderId.isValid()) {
-      return ExportDialog2::tr("Current Folder (%1)").arg(p_context.currentFolderId.relativePath);
+      return ExportDialog2::tr("Current folder (%1)").arg(p_context.currentFolderId.relativePath);
     }
-    return ExportDialog2::tr("Current Folder");
+    return ExportDialog2::tr("Current folder");
 
   case ExportSource::CurrentNotebook:
     if (!p_context.notebookId.isEmpty()) {
-      return ExportDialog2::tr("Current Notebook (%1)").arg(p_context.notebookId);
+      return ExportDialog2::tr("Current notebook (%1)").arg(p_context.notebookId);
     }
-    return ExportDialog2::tr("Current Notebook");
+    return ExportDialog2::tr("Current notebook");
   }
 
-  return ExportDialog2::tr("Unknown Source");
+  return ExportDialog2::tr("Unknown source");
 }
 
 bool sourceAvailable(ExportSource p_source, const ExportContext &p_context) {
@@ -273,8 +273,8 @@ void ExportDialog2::setupUI() {
           &QStackedLayout::setCurrentIndex);
   connect(m_formatCombo, QOverload<int>::of(&QComboBox::currentIndexChanged), this,
           [this](int p_idx) {
-            const QString titles[] = {tr("Markdown Options"), tr("HTML Options"), tr("PDF Options"),
-                                      tr("Custom Options")};
+            const QString titles[] = {tr("Markdown options"), tr("HTML options"), tr("PDF options"),
+                                      tr("Custom options")};
             if (p_idx >= 0 && p_idx < 4) {
               m_formatGroupBox->setTitle(titles[p_idx]);
             }
@@ -373,7 +373,7 @@ void ExportDialog2::setupUI() {
     m_wkhtmltopdfArgsEdit = WidgetsFactory::createLineEdit(page);
     layout->addRow(tr("Wkhtmltopdf arguments:"), m_wkhtmltopdfArgsEdit);
 
-    m_pdfAllInOneCheck = WidgetsFactory::createCheckBox(tr("All-in-One"), page);
+    m_pdfAllInOneCheck = WidgetsFactory::createCheckBox(tr("All-in-one"), page);
     m_pdfAllInOneCheck->setToolTip(tr("Export all source files into one file"));
     layout->addRow(m_pdfAllInOneCheck);
 
@@ -412,7 +412,7 @@ void ExportDialog2::setupUI() {
     m_useHtmlInputCheck = WidgetsFactory::createCheckBox(tr("Use HTML input"), page);
     layout->addRow(m_useHtmlInputCheck);
 
-    m_customAllInOneCheck = WidgetsFactory::createCheckBox(tr("All-in-One"), page);
+    m_customAllInOneCheck = WidgetsFactory::createCheckBox(tr("All-in-one"), page);
     m_customAllInOneCheck->setToolTip(tr("Export all source files into one file"));
     layout->addRow(m_customAllInOneCheck);
 
@@ -429,7 +429,7 @@ void ExportDialog2::setupUI() {
     m_stackedLayout->addWidget(page);
   }
 
-  m_formatGroupBox = new QGroupBox(tr("Markdown Options"), mainWidget);
+  m_formatGroupBox = new QGroupBox(tr("Markdown options"), mainWidget);
   auto *groupBoxLayout = new QVBoxLayout(m_formatGroupBox);
   groupBoxLayout->setContentsMargins(0, 0, 0, 0);
   groupBoxLayout->addWidget(stackedScrollWidget);

src/widgets/dialogs/managenotebooksdialog2.cpp

@@ -86,7 +86,7 @@ void ManageNotebooksDialog2::setupUI() {
           &ManageNotebooksDialog2::openRootFolderInExplorer);
 
   rootFolderWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
-  formLayout->addRow(tr("Root Folder:"), rootFolderWidget);
+  formLayout->addRow(tr("Root folder:"), rootFolderWidget);
 
   // Notebook type (read-only label).
   m_typeLabel = new QLabel(infoWidget);
@@ -104,8 +104,7 @@ void ManageNotebooksDialog2::setupUI() {
   m_closeBtn = new QPushButton(tr("Close Notebook"), infoWidget);
   m_closeBtn->setEnabled(false);
   btnLayout->addWidget(m_closeBtn);
-  connect(m_closeBtn, &QPushButton::clicked, this,
-          &ManageNotebooksDialog2::closeSelectedNotebook);
+  connect(m_closeBtn, &QPushButton::clicked, this, &ManageNotebooksDialog2::closeSelectedNotebook);
 
   setDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Apply | QDialogButtonBox::Reset |
                      QDialogButtonBox::Cancel);
@@ -272,9 +271,7 @@ void ManageNotebooksDialog2::acceptedButtonClicked() {
   }
 }
 
-void ManageNotebooksDialog2::resetButtonClicked() {
-  selectNotebook(m_currentNotebookId);
-}
+void ManageNotebooksDialog2::resetButtonClicked() { selectNotebook(m_currentNotebookId); }
 
 void ManageNotebooksDialog2::appliedButtonClicked() {
   if (saveChangesToNotebook()) {

src/widgets/dialogs/marknodedialog2.cpp

@@ -58,20 +58,20 @@ void MarkNodeDialog2::setupUI() {
   auto *layout = new QVBoxLayout(mainWidget);
 
   // Text color section.
-  auto *textSection = buildColorSection(tr("Text Color"), m_textColor, m_textSwatches,
+  auto *textSection = buildColorSection(tr("Text color"), m_textColor, m_textSwatches,
                                         c_swatchCount, m_textColorIndicator, m_textColor);
   layout->addWidget(textSection);
 
   // Background color section.
-  auto *bgSection = buildColorSection(tr("Background Color"), m_bgColor, m_bgSwatches,
+  auto *bgSection = buildColorSection(tr("Background color"), m_bgColor, m_bgSwatches,
                                       c_swatchCount, m_bgColorIndicator, m_bgColor);
   layout->addWidget(bgSection);
 
   // Preview section.
   auto *previewGroup = new QLabel(tr("Preview"), mainWidget);
   layout->addWidget(previewGroup);
 
-  m_previewLabel = new QLabel(tr("Sample Text"), mainWidget);
+  m_previewLabel = new QLabel(tr("Sample text"), mainWidget);
   m_previewLabel->setAlignment(Qt::AlignCenter);
   m_previewLabel->setMinimumHeight(48);
   m_previewLabel->setAutoFillBackground(true);

src/widgets/dialogs/newnotebookdialog2.cpp

@@ -69,14 +69,14 @@ void NewNotebookDialog2::setupUI() {
   m_rootFolderInput->setPlaceholderText(tr("Select a folder as notebook root"));
   connect(m_rootFolderInput, &LocationInputWithBrowseButton::textChanged, this,
           &NewNotebookDialog2::handleRootFolderPathChanged);
-  layout->addRow(tr("Root Folder:"), m_rootFolderInput);
+  layout->addRow(tr("Root folder:"), m_rootFolderInput);
 
   // Notebook type combo.
   m_typeCombo = WidgetsFactory::createComboBox(mainWidget);
-  m_typeCombo->addItem(tr("Bundled Notebook"), static_cast<int>(NotebookType::Bundled));
-  m_typeCombo->addItem(tr("Raw Notebook"), static_cast<int>(NotebookType::Raw));
-  m_typeCombo->setToolTip(tr("Bundled: Notebook with metadata stored in config files.\n"
-                             "Raw: Plain folder structure with minimal VNote metadata."));
+  m_typeCombo->addItem(tr("Bundled notebook"), static_cast<int>(NotebookType::Bundled));
+  m_typeCombo->addItem(tr("Raw notebook"), static_cast<int>(NotebookType::Raw));
+  m_typeCombo->setToolTip(tr("Bundled: notebook with metadata stored in config files.\n"
+                             "Raw: plain folder structure with minimal VNote metadata."));
   layout->addRow(tr("Type:"), m_typeCombo);
 
   // Update root folder tooltip based on selected notebook type.
@@ -104,13 +104,13 @@ void NewNotebookDialog2::setupUI() {
   // For Git sync, the actual remote URL + PAT are collected BEFORE notebook
   // creation via the Configure... button (pre-create flow per
   // notebook-sync-config-pre-create plan).
-  m_syncMethodLabel = new QLabel(tr("Sync Method:"), mainWidget);
+  m_syncMethodLabel = new QLabel(tr("Sync method:"), mainWidget);
   m_syncMethodLabel->setObjectName(QStringLiteral("syncMethodLabel"));
   m_syncMethodCombo = WidgetsFactory::createComboBox(mainWidget);
   m_syncMethodCombo->setObjectName(QStringLiteral("syncMethodCombo"));
   m_syncMethodCombo->addItem(tr("None"), QStringLiteral("none"));
   m_syncMethodCombo->addItem(tr("Git"), QStringLiteral("git"));
-  m_syncMethodCombo->setToolTip(tr("Git sync is supported only for Bundled notebooks. "
+  m_syncMethodCombo->setToolTip(tr("Git sync is supported only for bundled notebooks. "
                                    "Sync settings are configured immediately via the "
                                    "Configure... button before notebook creation."));
 
@@ -166,7 +166,7 @@ void NewNotebookDialog2::setupUI() {
       tr("Name or path for the assets folder.\n"
          "Can be a folder name (vx_assets), relative path, or absolute path.\n"
          "Relative paths resolve against each note file's parent directory."));
-  advancedLayout->addRow(tr("Assets Folder:"), m_assetsFolderEdit);
+  advancedLayout->addRow(tr("Assets folder:"), m_assetsFolderEdit);
 
   m_advancedSection->setVisible(false);
   layout->addRow(m_advancedSection);

src/widgets/dialogs/notebooksyncinfodialog2.cpp

@@ -217,13 +217,13 @@ void NotebookSyncInfoDialog2::setupUI() {
   m_lastSyncLabel->setObjectName(QString::fromLatin1(kLastSyncLabelName));
   m_lastSyncLabel->setText(tr("Never"));
   m_lastSyncLabel->setTextInteractionFlags(Qt::TextSelectableByMouse);
-  formLayout->addRow(tr("Last Sync:"), m_lastSyncLabel);
+  formLayout->addRow(tr("Last sync:"), m_lastSyncLabel);
 
   // 5. Current State (read-only, color-coded).
   m_currentStateLabel = new QLabel(centralWidget);
   m_currentStateLabel->setObjectName(QString::fromLatin1(kCurrentStateLabelName));
   m_currentStateLabel->setTextInteractionFlags(Qt::TextSelectableByMouse);
-  formLayout->addRow(tr("Current State:"), m_currentStateLabel);
+  formLayout->addRow(tr("Current state:"), m_currentStateLabel);
 
   // Action button row above the standard dialog button box.
   auto *actionRow = new QWidget(centralWidget);

src/widgets/dialogs/opennotebookdialog2.cpp

@@ -79,7 +79,7 @@ void OpenNotebookDialog2::setupUI() {
 
   // Top: mode selector radios.
   auto *modeRow = new QHBoxLayout();
-  m_localModeRadio = new QRadioButton(tr("Local Folder"), mainWidget);
+  m_localModeRadio = new QRadioButton(tr("Local folder"), mainWidget);
   m_localModeRadio->setObjectName(QLatin1String(kLocalModeRadioName));
   m_localModeRadio->setToolTip(tr("Open an existing VNote notebook from a local folder on disk."));
   m_localModeRadio->setChecked(true);

src/widgets/dialogs/openvnote3notebookdialog2.cpp

@@ -3,11 +3,11 @@
 #include <QApplication>
 #include <QCheckBox>
 #include <QCoreApplication>
-#include <QProgressDialog>
 #include <QDialogButtonBox>
 #include <QDir>
 #include <QFormLayout>
 #include <QLabel>
+#include <QProgressDialog>
 
 #include <controllers/openvnote3notebookcontroller.h>
 #include <core/servicelocator.h>
@@ -32,15 +32,15 @@ void OpenVNote3NotebookDialog2::setupUI() {
   m_sourceInput = new LocationInputWithBrowseButton(mainWidget);
   m_sourceInput->setBrowseType(LocationInputWithBrowseButton::Folder, tr("Select Source Folder"));
   m_sourceInput->setPlaceholderText(tr("Select the VNote3 notebook root folder"));
-  layout->addRow(tr("Source Folder:"), m_sourceInput);
+  layout->addRow(tr("Source folder:"), m_sourceInput);
 
   m_destinationInput = new LocationInputWithBrowseButton(mainWidget);
   m_destinationInput->setBrowseType(LocationInputWithBrowseButton::Folder,
                                     tr("Select Destination Folder"));
   m_destinationInput->setPlaceholderText(tr("Select the destination root folder"));
-  layout->addRow(tr("Destination Folder:"), m_destinationInput);
+  layout->addRow(tr("Destination folder:"), m_destinationInput);
 
-  m_nameTitleLabel = new QLabel(tr("Notebook Name:"), mainWidget);
+  m_nameTitleLabel = new QLabel(tr("Notebook name:"), mainWidget);
   m_nameLabel = new QLabel(mainWidget);
   m_nameTitleLabel->hide();
   m_nameLabel->hide();
@@ -53,9 +53,10 @@ void OpenVNote3NotebookDialog2::setupUI() {
   m_descriptionLabel->hide();
   layout->addRow(m_descriptionTitleLabel, m_descriptionLabel);
 
-  m_confirmCheckBox = new QCheckBox(
-      tr("I understand this will copy the notebook to the destination folder.\n"
-         "The legacy notebook would be kept for data backup."), mainWidget);
+  m_confirmCheckBox =
+      new QCheckBox(tr("I understand this will copy the notebook to the destination folder.\n"
+                       "The legacy notebook would be kept for data backup."),
+                    mainWidget);
   layout->addRow(QString(), m_confirmCheckBox);
 
   setCentralWidget(mainWidget);
@@ -169,8 +170,8 @@ void OpenVNote3NotebookDialog2::acceptedButtonClicked() {
   progress.show();
   QCoreApplication::processEvents();
 
-  connect(m_controller, &OpenVNote3NotebookController::progressUpdated,
-          this, [&progress](int p_val, int p_maximum, const QString &p_message) {
+  connect(m_controller, &OpenVNote3NotebookController::progressUpdated, this,
+          [&progress](int p_val, int p_maximum, const QString &p_message) {
             progress.setMaximum(p_maximum);
             progress.setValue(p_val);
             progress.setLabelText(p_message);