feat: add delete files by default setting for chat conversations

backend/internal/application/usersettings/service.go

@@ -20,32 +20,34 @@ func (e *ErrValidation) Error() string { return e.Msg }
 
 // allowedKeys 是用户可配置的 key 集合及其默认值。
 var allowedKeys = map[string]string{
-	"chat.file_mode":                    "auto",
-	"chat.send_on_enter":                "enter",
-	"chat.show_token_usage":             "true",
-	"chat.show_model_info":              "true",
-	"chat.show_latency":                 "true",
-	"chat.show_billing_cost":            "true",
-	"chat.default_model":                "",
-	"chat.auto_generate_title":          "true",
-	"chat.context_compact_auto":         "true",
-	"chat.markdown_render":              "true",
-	"chat.restore_draft_on_failure":     "true",
-	"chat.preserve_conversation_drafts": "true",
-	"chat.input_height":                 "standard",
+	"chat.file_mode":                            "auto",
+	"chat.send_on_enter":                        "enter",
+	"chat.show_token_usage":                     "true",
+	"chat.show_model_info":                      "true",
+	"chat.show_latency":                         "true",
+	"chat.show_billing_cost":                    "true",
+	"chat.default_model":                        "",
+	"chat.auto_generate_title":                  "true",
+	"chat.delete_conversation_files_by_default": "false",
+	"chat.context_compact_auto":                 "true",
+	"chat.markdown_render":                      "true",
+	"chat.restore_draft_on_failure":             "true",
+	"chat.preserve_conversation_drafts":         "true",
+	"chat.input_height":                         "standard",
 }
 
 // boolKeys 取值只能是 "true" / "false"。
 var boolKeys = map[string]bool{
-	"chat.show_token_usage":             true,
-	"chat.show_model_info":              true,
-	"chat.show_latency":                 true,
-	"chat.show_billing_cost":            true,
-	"chat.auto_generate_title":          true,
-	"chat.context_compact_auto":         true,
-	"chat.markdown_render":              true,
-	"chat.restore_draft_on_failure":     true,
-	"chat.preserve_conversation_drafts": true,
+	"chat.show_token_usage":                     true,
+	"chat.show_model_info":                      true,
+	"chat.show_latency":                         true,
+	"chat.show_billing_cost":                    true,
+	"chat.auto_generate_title":                  true,
+	"chat.delete_conversation_files_by_default": true,
+	"chat.context_compact_auto":                 true,
+	"chat.markdown_render":                      true,
+	"chat.restore_draft_on_failure":             true,
+	"chat.preserve_conversation_drafts":         true,
 }
 
 // enumKeys 枚举 key 的合法值集合。

frontend/features/chat/components/app-chat-area.tsx

@@ -25,6 +25,7 @@ import {
   sharePatchFromDTO,
 } from "@/features/chat/components/sections/conversation-share-dialog";
 import { DeleteFilesOption } from "@/features/recent/components/delete-files-option";
+import { useChatPreferences } from "@/features/settings/hooks/use-chat-preferences";
 import {
   AlertDialog,
   AlertDialogAction,
@@ -148,6 +149,7 @@ export function AppChatArea() {
     router.push("/chat");
   }, [requestNewConversation, router]);
   const activeGenerationRunsRef = React.useRef<Set<string>>(new Set());
+  const { deleteFilesByDefault } = useChatPreferences();
   const {
     items,
     projects,
@@ -496,8 +498,9 @@ export function AppChatArea() {
     if (!canOperateConversation) {
       return;
     }
+    setDeleteFiles(deleteFilesByDefault);
     setDeleteDialogOpen(true);
-  }, [canOperateConversation]);
+  }, [canOperateConversation, deleteFilesByDefault]);
 
   const onConfirmDeleteActiveConversation = React.useCallback(async () => {
     if (!canOperateConversation) {

frontend/features/layouts/components/navigation/nav-projects.tsx

@@ -55,6 +55,7 @@ import {
 } from "@/features/chat/components/sections/conversation-share-dialog"
 import { useConversationExportAction } from "@/features/chat/hooks/use-conversation-export-action"
 import { DeleteFilesOption } from "@/features/recent/components/delete-files-option"
+import { useChatPreferences } from "@/features/settings/hooks/use-chat-preferences"
 import { useActiveSidebarConversation } from "@/features/layouts/hooks/use-active-sidebar-conversation"
 import { SidebarConversationItem } from "@/features/layouts/components/navigation/sidebar-conversation-item"
 import type {
@@ -203,6 +204,7 @@ export function NavProjects() {
   const searchParams = useSearchParams()
   const activeProjectID = searchParams.get("project") ?? ""
   const activeConversationID = useActiveSidebarConversation()
+  const { deleteFilesByDefault: deleteConversationFilesByDefault } = useChatPreferences()
   const {
     items,
     projects,
@@ -282,8 +284,9 @@ export function NavProjects() {
   )
 
   const onDeleteConversation = React.useCallback((publicID: string, title: string) => {
+    setDeleteConversationFiles(deleteConversationFilesByDefault)
     setConversationDeleteTarget({ publicID, title })
-  }, [])
+  }, [deleteConversationFilesByDefault])
 
   const confirmDeleteConversation = React.useCallback(async () => {
     if (!conversationDeleteTarget) {

frontend/features/layouts/components/navigation/nav-recents.tsx

@@ -31,6 +31,7 @@ import {
 } from "@/features/chat/components/sections/conversation-share-dialog"
 import { useConversationExportAction } from "@/features/chat/hooks/use-conversation-export-action"
 import { DeleteFilesOption } from "@/features/recent/components/delete-files-option"
+import { useChatPreferences } from "@/features/settings/hooks/use-chat-preferences"
 import { useActiveSidebarConversation } from "@/features/layouts/hooks/use-active-sidebar-conversation"
 import { useSidebarListFlip } from "@/features/layouts/hooks/use-sidebar-list-flip"
 import type {
@@ -48,6 +49,7 @@ export function NavRecents() {
   const { isMobile, setOpenMobile } = useSidebar()
   const router = useRouter()
   const activeConversationID = useActiveSidebarConversation()
+  const { deleteFilesByDefault } = useChatPreferences()
 
   const {
     recentItems,
@@ -127,8 +129,9 @@ export function NavRecents() {
   )
 
   const onDelete = React.useCallback((publicID: string, title: string) => {
+    setDeleteFiles(deleteFilesByDefault)
     setDeleteTarget({ publicID, title })
-  }, [])
+  }, [deleteFilesByDefault])
 
   const onShare = React.useCallback((publicID: string, title: string) => {
     setShareTarget({ publicID, title })

frontend/features/layouts/components/navigation/nav-starred.tsx

@@ -34,6 +34,7 @@ import {
 } from "@/features/chat/components/sections/conversation-share-dialog"
 import { useConversationExportAction } from "@/features/chat/hooks/use-conversation-export-action"
 import { DeleteFilesOption } from "@/features/recent/components/delete-files-option"
+import { useChatPreferences } from "@/features/settings/hooks/use-chat-preferences"
 import { useActiveSidebarConversation } from "@/features/layouts/hooks/use-active-sidebar-conversation"
 import { useSidebarListFlip } from "@/features/layouts/hooks/use-sidebar-list-flip"
 import { SIDEBAR_OVERFLOW_ROW_TRANSITION } from "@/features/layouts/model/sidebar-motion"
@@ -64,6 +65,7 @@ export function NavStarred() {
   const { isMobile, setOpenMobile } = useSidebar()
   const router = useRouter()
   const activeConversationID = useActiveSidebarConversation()
+  const { deleteFilesByDefault } = useChatPreferences()
 
   const {
     starredItems,
@@ -195,8 +197,9 @@ export function NavStarred() {
   )
 
   const onDelete = React.useCallback((publicID: string, title: string) => {
+    setDeleteFiles(deleteFilesByDefault)
     setDeleteTarget({ publicID, title })
-  }, [])
+  }, [deleteFilesByDefault])
 
   const onShare = React.useCallback((publicID: string, title: string) => {
     setShareTarget({ publicID, title })

frontend/features/recent/hooks/use-recent-page.ts

@@ -8,6 +8,7 @@ import { toast } from "sonner";
 import { useLocalizedErrorMessage } from "@/i18n/use-localized-error";
 import { useLoadMoreSentinel } from "@/shared/hooks/use-load-more-sentinel";
 import { useSidebarRecents } from "@/features/recent/context/sidebar-recents-context";
+import { useChatPreferences } from "@/features/settings/hooks/use-chat-preferences";
 import { resolveAccessToken } from "@/shared/auth/resolve-access-token";
 import {
   exportConversation,
@@ -126,6 +127,7 @@ export function useRecentPage() {
   const [renameValue, setRenameValue] = React.useState("");
   const [deleteTarget, setDeleteTarget] = React.useState<RecentDeleteTarget>(null);
   const [deleteFiles, setDeleteFiles] = React.useState(false);
+  const { deleteFilesByDefault } = useChatPreferences();
   const [shareTarget, setShareTarget] = React.useState<ConversationDTO | null>(null);
   const loadMoreRef = React.useRef<HTMLDivElement | null>(null);
   const pageRef = React.useRef(1);
@@ -434,11 +436,12 @@ export function useRecentPage() {
   );
 
   const onDelete = React.useCallback((item: ConversationDTO) => {
+    setDeleteFiles(deleteFilesByDefault);
     setDeleteTarget({
       ids: [item.publicID],
       label: t("deleteConversationLabel", { title: item.title || t("untitled") }),
     });
-  }, [t]);
+  }, [deleteFilesByDefault, t]);
 
   const onExport = React.useCallback(async (item: ConversationDTO) => {
     const token = await resolveAccessToken();
@@ -608,11 +611,12 @@ export function useRecentPage() {
       return;
     }
 
+    setDeleteFiles(deleteFilesByDefault);
     setDeleteTarget({
       ids: [...selectedConversationIDs],
       label: t("selectedConversationCountLabel", { count: selectedConversationIDs.length }),
     });
-  }, [selectedConversationIDs, t]);
+  }, [deleteFilesByDefault, selectedConversationIDs, t]);
 
   const rowStates = React.useMemo<RecentRowState[]>(
     () =>

frontend/features/settings/components/sections/settings-chat.tsx

@@ -541,6 +541,19 @@ export function SettingsChat() {
               />
             </SettingsFieldRow>
           </div>
+          <div className="pt-4">
+            <SettingsFieldRow
+              title={t("input.deleteFilesDefaultTitle")}
+              description={t("input.deleteFilesDefaultDescription")}
+            >
+              <Switch
+                checked={settings.deleteFilesByDefault}
+                onCheckedChange={handleBool("chat.delete_conversation_files_by_default", "deleteFilesByDefault")}
+                disabled={loading}
+                aria-label={t("input.deleteFilesDefaultTitle")}
+              />
+            </SettingsFieldRow>
+          </div>
         </SettingsFieldList>
       </SettingsSection>
 

frontend/features/settings/events/user-settings-events.ts

@@ -0,0 +1,10 @@
+import type { UserSettingsMap } from "@/shared/api/user-settings";
+
+export const USER_SETTINGS_UPDATED_EVENT = "deeix-chat:user-settings-updated";
+
+export function dispatchUserSettingsUpdated(settings: UserSettingsMap) {
+  if (typeof window === "undefined") {
+    return;
+  }
+  window.dispatchEvent(new CustomEvent<UserSettingsMap>(USER_SETTINGS_UPDATED_EVENT, { detail: settings }));
+}

frontend/features/settings/hooks/use-chat-preferences.ts

@@ -0,0 +1,110 @@
+"use client";
+
+import * as React from "react";
+
+import { USER_SETTINGS_UPDATED_EVENT } from "@/features/settings/events/user-settings-events";
+import { getUserSettings } from "@/shared/api/user-settings";
+import { useAuthSession } from "@/shared/auth/auth-session-context";
+
+type ChatPreferences = {
+  autoGenerateTitle: boolean;
+  deleteFilesByDefault: boolean;
+};
+
+const DEFAULT_CHAT_PREFERENCES: ChatPreferences = {
+  autoGenerateTitle: true,
+  deleteFilesByDefault: false,
+};
+
+let cachedAccessToken: string | null = null;
+let cachedPreferences = DEFAULT_CHAT_PREFERENCES;
+let pendingAccessToken: string | null = null;
+let pendingPreferences: Promise<ChatPreferences> | null = null;
+
+function resolveChatPreferences(settings: Record<string, string>): ChatPreferences {
+  return {
+    autoGenerateTitle: settings["chat.auto_generate_title"] !== "false",
+    deleteFilesByDefault: settings["chat.delete_conversation_files_by_default"] === "true",
+  };
+}
+
+function resetChatPreferencesCache() {
+  cachedAccessToken = null;
+  cachedPreferences = DEFAULT_CHAT_PREFERENCES;
+  pendingAccessToken = null;
+  pendingPreferences = null;
+}
+
+function loadChatPreferences(accessToken: string): Promise<ChatPreferences> {
+  if (cachedAccessToken === accessToken) {
+    return Promise.resolve(cachedPreferences);
+  }
+  if (pendingPreferences && pendingAccessToken === accessToken) {
+    return pendingPreferences;
+  }
+
+  pendingAccessToken = accessToken;
+  pendingPreferences = getUserSettings(accessToken)
+    .then(resolveChatPreferences)
+    .then((preferences) => {
+      if (pendingAccessToken === accessToken) {
+        cachedAccessToken = accessToken;
+        cachedPreferences = preferences;
+      }
+      return preferences;
+    })
+    .catch(() => DEFAULT_CHAT_PREFERENCES)
+    .finally(() => {
+      if (pendingAccessToken === accessToken) {
+        pendingAccessToken = null;
+        pendingPreferences = null;
+      }
+    });
+
+  return pendingPreferences;
+}
+
+export function useChatPreferences(): ChatPreferences {
+  const { accessToken } = useAuthSession();
+  const [preferences, setPreferences] = React.useState<ChatPreferences>(() =>
+    accessToken && cachedAccessToken === accessToken ? cachedPreferences : DEFAULT_CHAT_PREFERENCES,
+  );
+
+  React.useEffect(() => {
+    let cancelled = false;
+
+    void (async () => {
+      if (!accessToken) {
+        resetChatPreferencesCache();
+        setPreferences(DEFAULT_CHAT_PREFERENCES);
+        return;
+      }
+      const nextPreferences = await loadChatPreferences(accessToken);
+      if (!cancelled) {
+        setPreferences(nextPreferences);
+      }
+    })();
+
+    return () => {
+      cancelled = true;
+    };
+  }, [accessToken]);
+
+  React.useEffect(() => {
+    const handleUserSettingsUpdated = (event: Event) => {
+      const settings = (event as CustomEvent<Record<string, string>>).detail;
+      if (settings && typeof settings === "object") {
+        const nextPreferences = resolveChatPreferences(settings);
+        cachedPreferences = nextPreferences;
+        setPreferences(nextPreferences);
+      }
+    };
+
+    window.addEventListener(USER_SETTINGS_UPDATED_EVENT, handleUserSettingsUpdated);
+    return () => {
+      window.removeEventListener(USER_SETTINGS_UPDATED_EVENT, handleUserSettingsUpdated);
+    };
+  }, []);
+
+  return preferences;
+}

frontend/features/settings/hooks/use-settings-chat.ts

@@ -10,6 +10,7 @@ import {
   groupModelsByVendor,
   parseChatSettings,
 } from "@/features/settings/utils/chat-settings";
+import { dispatchUserSettingsUpdated } from "@/features/settings/events/user-settings-events";
 import { useAuthSession } from "@/shared/auth/auth-session-context";
 import { listPublicModels } from "@/shared/api/model";
 import { getBillingConfig } from "@/shared/api/billing";
@@ -81,6 +82,7 @@ export function useSettingsChat(): UseSettingsChatResult {
           }
           const saved = parseChatSettings(map);
           setSettings((current) => ({ ...current, [field]: saved[field] }));
+          dispatchUserSettingsUpdated(map);
         })
         .catch((error) => {
           if (settingRequestSeqRef.current[key] !== requestSeq) {

frontend/features/settings/types/settings.ts

@@ -16,6 +16,7 @@ export type ChatSettings = {
   showBillingCost: boolean;
   markdownRender: boolean;
   autoGenerateTitle: boolean;
+  deleteFilesByDefault: boolean;
   contextCompactAuto: boolean;
   restoreDraftOnFailure: boolean;
   preserveConversationDrafts: boolean;

frontend/features/settings/utils/chat-settings.ts

@@ -16,6 +16,7 @@ export const DEFAULT_CHAT_SETTINGS: ChatSettings = {
   showBillingCost: true,
   markdownRender: true,
   autoGenerateTitle: true,
+  deleteFilesByDefault: false,
   contextCompactAuto: false,
   restoreDraftOnFailure: true,
   preserveConversationDrafts: true,
@@ -37,6 +38,7 @@ export function parseChatSettings(map: UserSettingsMap): ChatSettings {
     showBillingCost: map["chat.show_billing_cost"] !== "false",
     markdownRender: map["chat.markdown_render"] !== "false",
     autoGenerateTitle: map["chat.auto_generate_title"] !== "false",
+    deleteFilesByDefault: map["chat.delete_conversation_files_by_default"] === "true",
     contextCompactAuto: map["chat.context_compact_auto"] === "true",
     restoreDraftOnFailure: map["chat.restore_draft_on_failure"] !== "false",
     preserveConversationDrafts: map["chat.preserve_conversation_drafts"] !== "false",