增加会话标题重命名功能，优化历史面板交互

src/components/chat/chatStorage.ts

@@ -39,6 +39,7 @@ type ChatDB = DBSchema & {
 const emptyLoadedChatState = (): LoadedChatState => ({
   storageSessionId: undefined,
   title: undefined,
+  isTitleManuallyEdited: false,
   messages: [],
   sessionId: undefined,
   branchGroups: [],
@@ -55,6 +56,7 @@ const toLoadedChatState = (session: ChatSessionRecord | undefined): LoadedChatSt
   return {
     storageSessionId: session.id,
     title: session.title,
+    isTitleManuallyEdited: session.isTitleManuallyEdited ?? false,
     messages: sanitizeMessages(session.messages),
     sessionId: session.sessionId,
     branchGroups: sanitizeBranchGroups(session.branchGroups),
@@ -163,6 +165,7 @@ const migrateLegacyLocalStorage = async () => {
   const sessionRecord: ChatSessionRecord = {
     id: createId(),
     title: "新对话",
+    isTitleManuallyEdited: false,
     createdAt: now,
     updatedAt: now,
     sessionId: legacyState.sessionId,
@@ -241,6 +244,7 @@ export const saveActiveChatState = async (
   const nextRecord: ChatSessionRecord = {
     id: storageSessionId,
     title: finalTitle,
+    isTitleManuallyEdited: state.isTitleManuallyEdited ?? existingSession?.isTitleManuallyEdited ?? false,
     createdAt: existingSession?.createdAt ?? now,
     updatedAt: now,
     sessionId: state.sessionId,
@@ -272,6 +276,9 @@ export const listChatSessions = async (): Promise<ChatSessionSummary[]> => {
 export const updateChatSessionTitle = async (
   storageSessionId: string,
   title: string,
+  options?: {
+    isTitleManuallyEdited?: boolean;
+  },
 ): Promise<void> => {
   if (typeof window === "undefined") return;
 
@@ -285,6 +292,8 @@ export const updateChatSessionTitle = async (
   await db.put(SESSION_STORE, {
     ...session,
     title: normalizedTitle,
+    isTitleManuallyEdited:
+      options?.isTitleManuallyEdited ?? session.isTitleManuallyEdited ?? false,
     updatedAt: Date.now(),
   });
 };
@@ -298,6 +307,7 @@ export const createEmptyChatSession = async (): Promise<LoadedChatState> => {
   const session: ChatSessionRecord = {
     id: createId(),
     title: "新对话",
+    isTitleManuallyEdited: false,
     createdAt: now,
     updatedAt: now,
     sessionId: undefined,