fix: preserve complete consultation replies and recover retained history

src/pages/Chat/TeacherChatPanel.tsx

@@ -6,6 +6,7 @@ import type {
   TeacherDefinition,
   TeacherCatalog,
   TeacherReference,
+  TeacherRequest,
   TeacherSend,
   TeacherTopic,
   TeacherTopicList,
@@ -108,6 +109,7 @@ export function TeacherChatPanel({
       ? teachers.some((item) => item.teacher_id === topic.definition.config_id)
       : legacyEnabled;
   const pending = useRef<TeacherSend | null>(restorePendingSend(saved.pending));
+  const sendInFlight = useRef(false);
   useEffect(() => {
     persistDraft(text, references, pending.current);
   }, [text, references, persistDraft]);
@@ -293,11 +295,19 @@ export function TeacherChatPanel({
       if (version === generation.current) setBusy(false);
     }
   };
-  const send = async (action?: Pick<TeacherSend, 'text' | 'intent'>) => {
+  const send = async (action?: Pick<TeacherSend, 'text' | 'intent'>, retry?: TeacherRequest) => {
+    // A historical retry stays with its original topic and published Agent.
+    if (retry && (topicRef.current?.id !== topic?.id || topic?.projectId !== projectId
+      || (selectedAgentId && topic.definition.config_id !== selectedAgentId)
+      || !topic.requests.some((request) => request === retry && request.status === 'completed' && request.replyIncomplete))) return;
     const question = action?.text ?? text;
-    const questionReferences = action ? [] : references;
-    if (!question.trim() || busy || !topicEnabled || topicRef.current?.requests.some((request) => ['preparing', 'running'].includes(request.status))) return;
+    const questionReferences = retry?.references ?? (action ? [] : references);
+    const questionSourceId = retry
+      ? retry.sourceConversationId ?? (topic?.sourceConversationId === 'project' ? undefined : topic?.sourceConversationId)
+      : sourceId;
+    if (!question.trim() || busy || sendInFlight.current || !topicEnabled || topicRef.current?.requests.some((request) => ['preparing', 'running'].includes(request.status))) return;
     const version = generation.current;
+    sendInFlight.current = true;
     setBusy(true);
     setError('');
     let current = topicRef.current;
@@ -317,18 +327,19 @@ export function TeacherChatPanel({
         ? pending.current
         : null;
       // Copy changes must not create another charge for an uncertain hint request.
-      const retrySuggestions = action?.intent === 'suggestions' && previous?.intent === 'suggestions';
+      const retrySuggestions = !retry && action?.intent === 'suggestions' && previous?.intent === 'suggestions';
       const input =
         previous && (retrySuggestions || (
           previous.text === question &&
           (previous.intent ?? 'question') === (action?.intent ?? 'question') &&
-          JSON.stringify(previous.references) === JSON.stringify(questionReferences)
+          JSON.stringify(previous.references) === JSON.stringify(questionReferences) &&
+          (!retry || previous.sourceConversationId === (questionSourceId || undefined))
         ))
           ? previous
           : {
             requestId: crypto.randomUUID(), text: question, references: questionReferences,
             ...(action?.intent ? { intent: action.intent } : {}),
-            ...(sourceId ? { sourceConversationId: sourceId } : {}),
+            ...(questionSourceId ? { sourceConversationId: questionSourceId } : {}),
           };
       pending.current = input;
       persistDraft(text, references, input);
@@ -337,7 +348,7 @@ export function TeacherChatPanel({
       consume(next);
       pending.current = null;
       if (action) {
-        persistDraft(text, references);
+        persistDraft(draftRef.current.text, draftRef.current.references);
       } else {
         setText('');
         setReferences([]);
@@ -348,6 +359,7 @@ export function TeacherChatPanel({
       if (version === generation.current)
         setError(e instanceof Error ? e.message : '提问失败，请保留问题后重试');
     } finally {
+      sendInFlight.current = false;
       if (version === generation.current) setBusy(false);
     }
   };
@@ -395,7 +407,10 @@ export function TeacherChatPanel({
               </li>)}
             </ul>
           </details>}
-          {request.intent === 'suggestions' ? <>
+          {request.status === 'completed' && request.replyIncomplete ? <div className="space-y-3">
+            <p role="status" className="text-[13px] leading-7 text-muted-foreground">这次回复未能完整显示</p>
+            {request.intent !== 'check-in' && request.text.trim() && <button type="button" disabled={helpUnavailable} onClick={() => void send({ text: request.text, intent: request.intent }, request)} className="consultation-retry">重新回答</button>}
+          </div> : request.intent === 'suggestions' ? <>
             {['running', 'preparing'].includes(request.status)
               ? <p role="status" className="flex items-center gap-2 text-[13px] leading-7 text-muted-foreground"><Loader2 className="h-3.5 w-3.5 animate-spin motion-reduce:animate-none" />我看看你最近做到了哪里…</p>
               : request.status === 'completed' && <>
@@ -406,9 +421,10 @@ export function TeacherChatPanel({
               </>}
             {['failed', 'cancelled', 'interrupted'].includes(request.status) && <button type="button" disabled={helpUnavailable} onClick={askForSuggestions} className="consultation-retry">继续看看👀</button>}
           </> : request.response ? <TeacherReply text={request.response} /> : <div className="text-[13px] leading-7">{['running', 'preparing'].includes(request.status) ? <span role="status" className="inline-flex items-center gap-2 text-muted-foreground"><Loader2 className="h-3.5 w-3.5 animate-spin motion-reduce:animate-none" />{label}正在想…</span> : ['cancelled', 'interrupted'].includes(request.status) ? '这次先停在这里。想继续时可以再说说。' : ''}</div>}
-          {request.intent !== 'suggestions' && request.status === 'completed' && Boolean(request.suggestedQuestions?.length) && <div className="consultation-follow-ups" aria-label="接着聊">
+          {request.intent !== 'suggestions' && request.status === 'completed' && !request.replyIncomplete && Boolean(request.suggestedQuestions?.length) && <div className="consultation-follow-ups" aria-label="接着聊">
             {request.suggestedQuestions?.map((question, index) => <button type="button" key={`${request.id}:${index}`} disabled={helpUnavailable} onClick={() => void send({ text: question })} className="consultation-follow-up"><span className="min-w-0 flex-1">{question}</span><ChevronRight className="h-4 w-4 shrink-0 opacity-70" aria-hidden="true" /></button>)}
           </div>}
+          {request.status === 'completed' && !request.replyIncomplete && request.replyParseError && <p className="text-xs text-muted-foreground">回答正文已保留，部分附加内容未能显示。</p>}
           {request.unparsedResponse && <details className="min-w-0 text-xs text-muted-foreground">
             <summary className="cursor-pointer">查看收到的原始内容</summary>
             <pre className="mt-2 max-h-64 overflow-auto whitespace-pre-wrap break-words rounded-lg border p-3">{request.unparsedResponse}</pre>
@@ -416,7 +432,7 @@ export function TeacherChatPanel({
           {request.progress && ['running', 'preparing'].includes(request.status) && <p role="status" className="text-xs text-muted-foreground">{request.progress}</p>}
           {(request.truncatedMessages ?? 0) > 0 && <p className="text-xs text-muted-foreground">{draftRevision ? '较长的上下文已节选。' : '较长的上下文已节选，智能体可按需读取原文。'}</p>}
           {request.error && <p className="text-xs text-destructive">{request.error}</p>}
-          {onBringBack && request.response && request.intent !== 'suggestions' && request.status === 'completed' && <div className="text-[11px] text-muted-foreground">
+          {onBringBack && request.response && !request.replyIncomplete && request.intent !== 'suggestions' && request.status === 'completed' && <div className="text-[11px] text-muted-foreground">
             <button onClick={() => onBringBack(request.response)}>带回主会话草稿</button>
           </div>}
         </div>)}