fix: hide fully loaded history notice

src/components/ChatPanel.tsx

@@ -129,7 +129,6 @@ export function ChatPanel({
   const [pendingImages, setPendingImages] = useState<PendingChatImage[]>([]);
   const [uploadingImage, setUploadingImage] = useState(false);
   const [imageError, setImageError] = useState<string | null>(null);
-  const [showHistoryFullyLoadedNotice, setShowHistoryFullyLoadedNotice] = useState(false);
   const [voiceStopSignal, setVoiceStopSignal] = useState(0);
   const [randomPrompt] = useState(
     () => CHAT_PLACEHOLDER_PROMPTS[Math.floor(Math.random() * CHAT_PLACEHOLDER_PROMPTS.length)],
@@ -197,22 +196,8 @@ export function ChatPanel({
     initializedSessionRef.current = null;
     pendingOlderLoadRef.current = null;
     nearBottomRef.current = true;
-    setShowHistoryFullyLoadedNotice(false);
   }, [session?.id]);
 
-  useEffect(() => {
-    const isHomeWelcome = variant !== 'compact' && messages.length === 0;
-    if (isHomeWelcome || historyTotal <= 0 || historyHasMore || historyLoadingMore) {
-      setShowHistoryFullyLoadedNotice(false);
-      return;
-    }
-    setShowHistoryFullyLoadedNotice(true);
-    const timer = window.setTimeout(() => {
-      setShowHistoryFullyLoadedNotice(false);
-    }, 5000);
-    return () => window.clearTimeout(timer);
-  }, [historyHasMore, historyLoadingMore, historyTotal, messages.length, variant]);
-
   useLayoutEffect(() => {
     const container = mainRef.current;
     if (!container) return;
@@ -555,13 +540,11 @@ export function ChatPanel({
         className={compact ? 'space-chat-panel-body' : `main${showHomeWelcome ? ' main-home' : ''}`}
         onScroll={handleMainScroll}
       >
-        {!showHomeWelcome && (historyLoadingMore || historyHasMore || showHistoryFullyLoadedNotice) && (
+        {!showHomeWelcome && (historyLoadingMore || historyHasMore) && (
           <div className="chat-history-loader" role="status">
             {historyLoadingMore
               ? `正在加载更早消息… 已加载 ${messages.length}${historyTotal > 0 ? ` / ${historyTotal}` : ''}`
-              : historyHasMore
-                ? `向上滚动加载更早消息${historyTotal > 0 ? ` · 已加载 ${messages.length} / ${historyTotal}` : ''}`
-                : `历史消息已全部加载${historyTotal > 0 ? ` · ${messages.length} / ${historyTotal}` : ''}`}
+              : `向上滚动加载更早消息${historyTotal > 0 ? ` · 已加载 ${messages.length} / ${historyTotal}` : ''}`}
           </div>
         )}
         <MessageList