chat: persist last session and require sessionId

src/pages/chat/ChatPage.tsx

@@ -14,6 +14,8 @@ import { useChatData } from './hooks/useChatData';
 import { useChatSender } from './hooks/useChatSender';
 import { markdownToPlainText } from './utils/copy';
 
+const lastSessionKey = (agentId: string) => `chat:lastSession:${agentId}`;
+
 export default function ChatPage() {
   const { id } = useParams();
   const navigate = useNavigate();
@@ -33,18 +35,70 @@ export default function ChatPage() {
   const { bodyRef, scrollBottom, initialScrollDoneRef } = useChatScroll();
 
   useEffect(() => {
+    if (!id) return;
+
     const s = searchParams.get('session');
     const m = searchParams.get('msg');
+
     if (s) {
       setSessionId(s);
-      if (m) setHighlightId(m);
-      const next = new URLSearchParams(searchParams);
-      next.delete('session');
-      next.delete('msg');
-      setSearchParams(next, { replace: true });
+      try {
+        localStorage.setItem(lastSessionKey(id), s);
+      } catch {
+        // ignore
+      }
+      if (m) {
+        setHighlightId(m);
+        const next = new URLSearchParams(searchParams);
+        next.delete('msg');
+        setSearchParams(next, { replace: true });
+      }
+      return;
     }
+
+    const saved = (() => {
+      try {
+        return localStorage.getItem(lastSessionKey(id));
+      } catch {
+        return null;
+      }
+    })();
+    if (saved) {
+      setSessionId(saved);
+      return;
+    }
+
+    (async () => {
+      try {
+        const list = await SessionAPI.list(id, '0');
+        if (list.length > 0) {
+          setSessionId(list[0].id);
+          return;
+        }
+        const created = await SessionAPI.create(id);
+        setSessionId(created.id);
+      } catch (e: any) {
+        message.error('加载会话失败：' + (e?.message ?? e));
+      }
+    })();
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [searchParams]);
+  }, [id]);
+
+  useEffect(() => {
+    if (!id || !sessionId) return;
+    try {
+      localStorage.setItem(lastSessionKey(id), sessionId);
+    } catch {
+      // ignore
+    }
+    const cur = searchParams.get('session');
+    if (cur === sessionId) return;
+    const next = new URLSearchParams(searchParams);
+    next.set('session', sessionId);
+    next.delete('msg');
+    setSearchParams(next, { replace: true });
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [id, sessionId]);
 
   const { agent, agentList, messages, setMessages, branches, setBranches, loadMessages } = useChatData({
     agentId: id,

src/pages/chat/hooks/useChatData.ts

@@ -48,7 +48,7 @@ export function useChatData(args: {
   };
 
   const loadMessages = async () => {
-    if (!agentId) return;
+    if (!agentId || !sessionId) return;
     const his = await ChatAPI.history(agentId, sessionId || undefined);
     setMessages(Array.isArray(his.messages) ? his.messages : []);
     setBranches(his.branches || {});
@@ -92,7 +92,7 @@ export function useChatData(args: {
   }, [agentId]);
 
   useEffect(() => {
-    if (!agentId) return;
+    if (!agentId || !sessionId) return;
     loadMessages();
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [sessionId, highlightId, agentId]);
@@ -107,4 +107,3 @@ export function useChatData(args: {
     loadMessages
   };
 }
-

src/pages/chat/hooks/useChatSender.ts

@@ -52,6 +52,10 @@ export function useChatSender(args: {
 
   const handleSendStream = async (text: string) => {
     if (!agentId) return;
+    if (!sessionId) {
+      notify.error('会话未初始化，请稍后重试');
+      return;
+    }
     const tempUser: ChatMessage = { id: 'tmp-' + Date.now(), role: 'user', content: text, createdAt: Date.now() };
     args.setMessages((m) => [...(m || []), tempUser]);
     setStreaming({ active: true, reasoningText: '', answerText: '', errorMessage: null, retryInfo: null, retrieved: [], toolCalls: [] });
@@ -144,7 +148,7 @@ export function useChatSender(args: {
           }
         },
         ctrl.signal,
-        sessionId || undefined,
+        sessionId,
         model,
         modelId,
         imageUrls
@@ -167,6 +171,10 @@ export function useChatSender(args: {
 
   const handleSendNonStream = async (text: string) => {
     if (!agentId) return;
+    if (!sessionId) {
+      notify.error('会话未初始化，请稍后重试');
+      return;
+    }
     const tempUser: ChatMessage = { id: 'tmp-' + Date.now(), role: 'user', content: text, createdAt: Date.now() };
     args.setMessages((m) => [...(m || []), tempUser]);
     scrollBottom(true);
@@ -174,7 +182,7 @@ export function useChatSender(args: {
     const content = attText ? `${text}\n\n${attText}` : text;
     const model = overrides.model || agentModels[0]?.name || '';
     try {
-      const res = await ChatAPI.send(agentId, content, sessionId || undefined, model, imageUrls);
+      const res = await ChatAPI.send(agentId, content, sessionId, model, imageUrls);
       args.setMessages((m) => [...(m || []).filter((x) => x.id !== tempUser.id), res.user, res.assistant]);
       setSessionRefresh((t) => t + 1);
       setAttachments([]);
@@ -206,7 +214,11 @@ export function useChatSender(args: {
 
   const handleClear = async () => {
     if (!agentId) return;
-    await ChatAPI.clear(agentId, sessionId || undefined);
+    if (!sessionId) {
+      notify.error('会话未初始化，请稍后重试');
+      return;
+    }
+    await ChatAPI.clear(agentId, sessionId);
     args.setMessages(() => []);
     setBranches({});
     notify.success('对话已清空');