feat(coding): complete PI conversation UI

tests/unit/coding-workspace-store.test.ts

@@ -121,4 +121,39 @@ describe('coding workspace store', () => {
     expect(store.getState().conversations).toEqual([created]);
     expect(store.getState().creatingAgentIds).toEqual({});
   });
+
+  it('keeps title, archive, and unread metadata scoped to the patched Conversation', async () => {
+    const first = conversation('conversation-a', 'agent-a');
+    const second = conversation('conversation-b', 'agent-a');
+    const patchConversation = vi.fn(async (_id: string, patch: { title?: string; archived?: boolean; unread?: boolean }) => ({
+      ...first,
+      ...(patch.title ? { title: patch.title } : {}),
+      ...(patch.archived ? { archivedAt: '2026-08-24T01:00:00.000Z' } : {}),
+      ...(patch.unread !== undefined ? { unread: patch.unread } : {}),
+    }));
+    const store = createCodingWorkspaceStore({
+      listProjects: vi.fn(async () => ({ projects: [project], activeProjectId: project.id })),
+      getConfig: vi.fn(async () => ({ project, config: config([agent('agent-a')]) })),
+      listConversations: vi.fn(async () => [first, second]),
+      createConversation: vi.fn(),
+      patchConversation,
+    });
+    await store.getState().load();
+
+    await store.getState().patchConversation(first.id, {
+      title: 'Feature UI',
+      archived: true,
+      unread: true,
+    });
+
+    expect(patchConversation).toHaveBeenCalledWith(first.id, {
+      title: 'Feature UI',
+      archived: true,
+      unread: true,
+    });
+    expect(store.getState().conversations).toEqual([
+      expect.objectContaining({ id: first.id, title: 'Feature UI', unread: true, archivedAt: expect.any(String) }),
+      second,
+    ]);
+  });
 });