feat(coding): add conversation archive and first-message titles

tests/unit/coding-conversations-store.test.tsx

@@ -2,6 +2,7 @@ import { act, renderHook, waitFor } from '@testing-library/react';
 import { readFile } from 'node:fs/promises';
 import { fileURLToPath } from 'node:url';
 import { useStore } from 'zustand';
+import { codingWorkspaceStore } from '@/stores/coding-workspace';
 import { describe, expect, it, vi } from 'vitest';
 import { AppError } from '@/lib/error-model';
 import {
@@ -29,7 +30,7 @@ class FakeEventSource {
     this.listeners.set(type, listeners);
   }
 
-  emit(type: 'snapshot' | 'patch-batch', value: unknown): void {
+  emit(type: 'snapshot' | 'patch-batch' | 'conversation.metadata-changed', value: unknown): void {
     const event = new MessageEvent(type, { data: JSON.stringify(value) });
     for (const listener of this.listeners.get(type) ?? []) {
       if (typeof listener === 'function') listener(event);
@@ -138,6 +139,27 @@ function ids() {
 }
 
 describe('coding Conversation store', () => {
+  it('refreshes only metadata on title events and EventSource reconnect without preparing workers', async () => {
+    const previous = codingWorkspaceStore.getState();
+    const refresh = vi.fn(async () => undefined);
+    codingWorkspaceStore.setState({ activeProjectId: 'project-metadata', refreshConversations: refresh });
+    const source = new FakeEventSource();
+    const getSnapshot = vi.fn();
+    const store = createCodingConversationStore({ openEvents: async () => source as unknown as EventSource, getSnapshot });
+    try {
+      await store.getState().connectEvents();
+      source.emit('conversation.metadata-changed', { projectId: 'project-metadata', conversationId: 'hidden' });
+      source.open();
+      source.fail();
+      source.open();
+      expect(refresh.mock.calls).toEqual([['project-metadata'], ['project-metadata'], ['project-metadata']]);
+      expect(getSnapshot).not.toHaveBeenCalled();
+    } finally {
+      store.getState().disconnectEvents();
+      codingWorkspaceStore.setState(previous, true);
+    }
+  });
+
   it('queues observation sync only for a live completed ordinary prompt', () => {
     const queueSettledSessionSync = vi.fn();
     const store = createCodingConversationStore({