fix(chat): reconcile reply recovery with continuous agent conversations

electron/coding-teacher/conversation-store.ts

@@ -5,9 +5,9 @@ import type { TeacherDefinition, TeacherHistoryPage, TeacherRequest, TeacherTopi
 import { excerptTeacherText, teacherHistoryMessages } from './context';
 import { atomicWriteJson, readJsonFile } from '../coding-projects/atomic-json';
 import { TeacherError } from './config-client';
-import { teacherTopicId } from './store';
+import { repairCompletedReply, teacherTopicId } from './store';
 
-interface TurnIndex { id: string; createdAt: string; origin?: string; messages: ReturnType<typeof teacherHistoryMessages> }
+interface TurnIndex { replyProjectionVersion?: 1; id: string; createdAt: string; origin?: string; messages: ReturnType<typeof teacherHistoryMessages> }
 interface Manifest {
   topic: Omit<TeacherTopic, 'requests'>;
   turns: TurnIndex[];
@@ -18,8 +18,13 @@ const isMissing = (error: unknown) => (error as NodeJS.ErrnoException)?.code ===
 const originKey = (request: TeacherRequest) => request.origin
   ? [request.origin.projectId, request.origin.topicId, request.origin.requestId].join(':') : undefined;
 const order = (a: TurnIndex, b: TurnIndex) => a.createdAt.localeCompare(b.createdAt) || (a.origin ?? a.id).localeCompare(b.origin ?? b.id);
-const indexTurn = (turn: TeacherRequest): TurnIndex => ({ id: turn.id, createdAt: turn.createdAt, origin: originKey(turn),
-  messages: teacherHistoryMessages([turn]).map(message => ({ ...message, text: excerptTeacherText(message.text, 180).replaceAll('\n', ' ') })) });
+const indexTurn = (turn: TeacherRequest): TurnIndex => {
+  const projection = structuredClone(turn);
+  repairCompletedReply(projection);
+  return { id: turn.id, createdAt: turn.createdAt, origin: originKey(turn), replyProjectionVersion: 1,
+    messages: teacherHistoryMessages([projection]).map(message => ({ ...message,
+      text: excerptTeacherText(message.text, 180).replaceAll('\n', ' ') })) };
+};
 
 /** A small index and one atomic file per turn. Only the latest page is held live. */
 export class TeacherConversationStore {
@@ -64,17 +69,23 @@ export class TeacherConversationStore {
       turn.status = 'interrupted';
       turn.error = '应用已重启，本次回复中断。';
       await atomicWriteJson(this.turnPath(turn.id), turn);
+      const index = manifest.turns.findIndex(item => item.id === turn.id);
+      if (index >= 0) manifest.turns[index] = indexTurn(turn);
       recovered = true;
     }
     if (recovered) {
       this.live.revision++;
-      await this.save(this.live);
+      // Only restart metadata changes here; completed display repairs stay in memory.
+      await this.save(this.live, '');
     }
   }
   private async turn(id: string) {
     const turn = await readJsonFile(this.turnPath(id)) as TeacherRequest;
     if (turn.id !== id || !Array.isArray(turn.references))
       throw new TeacherError(409, 'teacher_history_invalid', '智能体消息无法读取，请保留本机记录。');
+    repairCompletedReply(turn);
+    const index = this.manifest?.turns.findIndex(item => item.id === turn.id) ?? -1;
+    if (this.manifest && index >= 0) this.manifest.turns[index] = indexTurn(turn);
     return turn;
   }
   async exists() { await this.load(); return Boolean(this.manifest); }
@@ -113,7 +124,11 @@ export class TeacherConversationStore {
     const entries = structuredClone(this.manifest?.turns ?? []);
     const owners = new Map(entries.flatMap(turn => turn.messages.map(message => [message.id, turn.id] as const)));
     return {
-      messages: entries.flatMap(turn => turn.messages),
+      // Older indexes may contain the unsafe quoted prefix. Keep them lazy:
+      // expose an ID for reading, not an unverified assistant excerpt.
+      messages: entries.flatMap(turn => turn.messages.map(message =>
+        turn.replyProjectionVersion === 1 || message.role !== 'assistant' ? message
+          : { ...message, text: '（按消息 ID 读取完整回复）' })),
       read: async (id: string) => {
         const owner = owners.get(id);
         return owner ? teacherHistoryMessages([await this.turn(owner)]).find(message => message.id === id) : undefined;

electron/coding-teacher/reply.ts

@@ -13,9 +13,10 @@ export function applyTeacherReply(request: TeacherRequest, raw: string): void {
   // Apply the current UI contract only to new replies; archived replies keep
   // their original cards through the compatibility parser and topic store.
   if (parsed.quickReplies.length > MAX_CURRENT_QUICK_REPLIES) {
+    request.replyQuickRepliesRejected = true;
     parsed.quickReplies = [];
     parsed.parseError ??= '快捷回复超过当前界面最多 3 条的限制，正文已保留，快捷回复未展示。';
-  }
+  } else delete request.replyQuickRepliesRejected;
   request.response = parsed.reply;
   request.suggestedQuestions = parsed.quickReplies;
   if (parsed.incomplete) request.replyIncomplete = true;

electron/coding-teacher/store.ts

@@ -6,12 +6,16 @@ import { isTeacherReplyEnvelope, parseTeacherReply } from '../../shared/teacher-
 import { TeacherError } from './config-client';
 
 /** Repair only received, completed protocol replies; never resume a model request. */
-function repairCompletedReply(request: TeacherRequest): void {
+export function repairCompletedReply(request: TeacherRequest): void {
   const raw = request.unparsedResponse;
   if (request.status !== 'completed' || typeof raw !== 'string'
     || !(request.discussionError || request.replyParseError || request.replyIncomplete)
     || !isTeacherReplyEnvelope(raw)) return;
   const parsed = parseTeacherReply(raw);
+  if (request.replyQuickRepliesRejected) {
+    parsed.quickReplies = [];
+    parsed.parseError ??= request.replyParseError;
+  }
   if (parsed.incomplete) {
     // Keep the previous text and diagnostics as evidence, but do not present a
     // legacy half-sentence as a complete reply.