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

tests/unit/pi-managed-user-entry-fork-real.test.ts

@@ -82,7 +82,8 @@ describe('real managed Pi user-entry fork', () => {
     });
     const source = await store.create({
       agentId: 'agent-real-fork',
-      title: 'Persisted source',
+      title: '新对话',
+      titleMode: 'automatic',
       model,
       modelResolution: 'resolved',
     });
@@ -185,6 +186,7 @@ describe('real managed Pi user-entry fork', () => {
 
     try {
       const sourceSnapshot = await service.getSnapshot(source.id);
+      expect((await service.getConversation(source.id)).title).toBe('Persisted user fork source');
       expect(processOptions[0]?.sessionDir).toBe(sessionDirectory);
       expect(processOptions[0]?.cwd).toBe(project.path);
       expect(sourceSnapshot.nodes).toEqual(expect.arrayContaining([
@@ -204,6 +206,7 @@ describe('real managed Pi user-entry fork', () => {
         store.get(forked.id),
       ]);
       expect(forked.agentId).toBe(source.agentId);
+      expect(forkedBinding).toMatchObject({ titleMode: 'manual', autoTitleSet: true });
       expect(forkedSnapshot).toMatchObject({
         conversation: { id: forked.id, agentId: source.agentId },
         nodes: [],
@@ -221,6 +224,7 @@ describe('real managed Pi user-entry fork', () => {
       expect(forkedBinding?.sessionKey).not.toBe(sourceBinding?.sessionKey);
       expect(runtime.getDiagnostics().workers).toHaveLength(2);
     } finally {
+      service.dispose();
       await runtime.shutdown();
       await extensionHost.close();
     }