fix(chat): speed up history switch

src/components/HistorySidebar.tsx

@@ -59,11 +59,13 @@ export function HistorySidebar({
   const bodyRef = useRef<HTMLDivElement>(null);
   const [visibleCount, setVisibleCount] = useState(appConfig.sessionPageSize);
   const [pendingDeleteId, setPendingDeleteId] = useState<string | null>(null);
+  const [pendingSelectId, setPendingSelectId] = useState<string | null>(null);
 
   useEffect(() => {
     if (open) {
       setVisibleCount(appConfig.sessionPageSize);
       setPendingDeleteId(null);
+      setPendingSelectId(null);
     }
   }, [open, sessions.length]);
 
@@ -77,6 +79,7 @@ export function HistorySidebar({
   }, [visibleCount, sessions.length]);
 
   const handleDeleteClick = useCallback((sessionId: string) => {
+    setPendingSelectId(null);
     setPendingDeleteId(sessionId);
   }, []);
 
@@ -92,6 +95,24 @@ export function HistorySidebar({
     setPendingDeleteId(null);
   }, []);
 
+  const handleSelectClick = useCallback(
+    (sessionId: string) => {
+      if (pendingDeleteId === sessionId) return;
+      if (activeSessionId === sessionId) {
+        setPendingSelectId(null);
+        onSelect(sessionId);
+        return;
+      }
+      if (pendingSelectId === sessionId) {
+        setPendingSelectId(null);
+        onSelect(sessionId);
+        return;
+      }
+      setPendingSelectId(sessionId);
+    },
+    [activeSessionId, onSelect, pendingDeleteId, pendingSelectId],
+  );
+
   if (!open) return null;
 
   const visibleSessions = sessions.slice(0, visibleCount);
@@ -130,17 +151,21 @@ export function HistorySidebar({
                     {group.sessions.map((item) => {
                       const label = getSessionListLabel(item);
                       const isPending = pendingDeleteId === item.id;
+                      const isPendingSelect = pendingSelectId === item.id;
                       return (
                         <li key={item.id} className={`sidebar-item-wrap${isPending ? ' sidebar-item-confirming' : ''}`}>
                           <button
                             type="button"
-                            className={`sidebar-item ${item.id === activeSessionId ? 'sidebar-item-active' : ''}`}
-                            onClick={() => { if (!isPending) onSelect(item.id); }}
+                            className={`sidebar-item ${item.id === activeSessionId ? 'sidebar-item-active' : ''}${isPendingSelect ? ' sidebar-item-pending' : ''}`}
+                            onClick={() => handleSelectClick(item.id)}
                           >
                             <span className="sidebar-item-title">{label}</span>
                             <span className="sidebar-item-meta">
                               {formatSessionTime(item.updated_at ?? item.created_at)}
                             </span>
+                            {isPendingSelect && item.id !== activeSessionId ? (
+                              <span className="sidebar-item-hint">轻点打开</span>
+                            ) : null}
                           </button>
                           {isPending ? (
                             <div className="sidebar-item-confirm">

src/hooks/useTKMindChat.ts

@@ -610,22 +610,24 @@ export function useTKMindChat(
       setPendingTool(null);
       activeRequestId.current = null;
 
-      const resumed = options?.skipResume
-        ? (options.seedSession ?? null)
-        : await resumeSession(sessionId);
-      if (token !== connectTokenRef.current) return;
-
       const knownSession = sessionsRef.current.find((s) => s.id === sessionId);
       const hints = knownSession
         ? { messageCount: knownSession.message_count, updatedAt: knownSession.updated_at }
         : undefined;
-      const { session: detail, messages: history } = await loadSessionDetail(sessionId, hints);
+      const detailPromise = loadSessionDetail(sessionId, hints);
+      const resumedPromise = options?.skipResume
+        ? Promise.resolve(options.seedSession ?? null)
+        : resumeSession(sessionId);
+      const { session: detail, messages: history } = await detailPromise;
       if (token !== connectTokenRef.current) return;
 
       writeStoredSessionId(userRef.current?.id, sessionId);
-      setSession({ ...detail, ...(resumed ?? {}), id: sessionId });
+      setSession((current) => (current?.id === sessionId ? { ...detail, ...current, id: sessionId } : { ...detail, id: sessionId }));
       messagesRef.current = history;
       setMessages(history);
+      const resumed = await resumedPromise;
+      if (token !== connectTokenRef.current) return;
+      setSession({ ...detail, ...(resumed ?? {}), id: sessionId });
       setChatState('idle');
       setSessions((prev) => prependUnique(prev, { ...detail, ...resumed, id: sessionId }));
 

src/index.css

@@ -253,6 +253,10 @@ body,
   color: var(--color-text-primary);
 }
 
+.sidebar-item-pending {
+  background: rgba(255, 255, 255, 0.06);
+}
+
 .sidebar-item-title {
   display: block;
   font-size: 14px;
@@ -269,6 +273,13 @@ body,
   color: var(--color-text-faint);
 }
 
+.sidebar-item-hint {
+  display: block;
+  margin-top: 6px;
+  font-size: 11px;
+  color: var(--color-text-secondary);
+}
+
 .sidebar-item-confirming .sidebar-item {
   pointer-events: none;
   opacity: 0.6;