合并 AI 设计多会话客户端

整合 Enter 发送与多会话交互，保留服务端持久 Conversation Session，并补齐迁移、回归、Electron E2E 与 canonical 文档。

tests/unit/sidebar-opencode-projects.test.tsx

@@ -376,8 +376,16 @@ describe('Sidebar project initialization flow', () => {
     const summary = {
       workspaceId: 'cloud-project',
       title: '云端概念设计',
-      turnRevision: 0,
       viewRevision: 0,
+      conversationCount: 1,
+      phase: 'shaping',
+      updatedAt: '2026-07-31T10:00:00Z',
+    };
+    const conversation = {
+      conversationId: 'cloud-conversation',
+      workspaceId: 'cloud-project',
+      title: '主会话',
+      turnRevision: 0,
       phase: 'shaping',
       brief: {
         version: 0,
@@ -387,8 +395,21 @@ describe('Sidebar project initialization flow', () => {
         ready: false,
         missingDecision: '作品形式',
       },
+      createdAt: '2026-07-31T10:00:00Z',
       updatedAt: '2026-07-31T10:00:00Z',
+      messages: [],
     };
+    const { messages: _messages, ...conversationSummary } = conversation;
+    const secondConversation = {
+      ...conversation,
+      conversationId: 'cloud-conversation-two',
+      title: '第二会话',
+      messages: [],
+      createdAt: '2026-07-31T10:05:00Z',
+      updatedAt: '2026-07-31T10:05:00Z',
+    };
+    const { messages: _secondMessages, ...secondConversationSummary } = secondConversation;
+    let hasSecondConversation = false;
     const bootstrap = {
       capabilities: {
         conversation: true,
@@ -403,15 +424,51 @@ describe('Sidebar project initialization flow', () => {
         return { success: true, data: bootstrap };
       }
       if (path === '/api/works/image-workspace/workspaces/cloud-project' && !init?.method) {
-        return { success: true, data: { ...summary, messages: [] } };
+        return {
+          success: true,
+          data: {
+            ...summary,
+            conversationCount: hasSecondConversation ? 2 : 1,
+            conversations: hasSecondConversation
+              ? [secondConversationSummary, conversationSummary]
+              : [conversationSummary],
+          },
+        };
+      }
+      if (path === '/api/works/image-workspace/workspaces/cloud-project/conversations/cloud-conversation') {
+        return { success: true, data: conversation };
+      }
+      if (path === '/api/works/image-workspace/workspaces/cloud-project-two/conversations/cloud-conversation-two') {
+        return {
+          success: true,
+          data: {
+            ...conversation,
+            workspaceId: 'cloud-project-two',
+            conversationId: 'cloud-conversation-two',
+          },
+        };
       }
       if (path === '/api/works/image-workspace/workspaces/cloud-project/tasks') {
         return { success: true, data: [] };
       }
+      if (path === '/api/works/image-workspace/workspaces/cloud-project/conversations'
+        && init?.method === 'POST') {
+        hasSecondConversation = true;
+        return { success: true, data: secondConversation };
+      }
       if (path === '/api/works/image-workspace/workspaces' && init?.method === 'POST') {
         return {
           success: true,
-          data: { ...summary, workspaceId: 'cloud-project-two', title: '角色设定', messages: [] },
+          data: {
+            ...summary,
+            workspaceId: 'cloud-project-two',
+            title: '角色设定',
+            conversations: [{
+              ...conversationSummary,
+              workspaceId: 'cloud-project-two',
+              conversationId: 'cloud-conversation-two',
+            }],
+          },
         };
       }
       throw new Error(`Unexpected path ${path}`);
@@ -428,6 +485,19 @@ describe('Sidebar project initialization flow', () => {
     expect(screen.queryByText('项目模板')).not.toBeInTheDocument();
     expect(hostApiFetchMock.mock.calls.some(([path]) => path === '/api/opencode/projects')).toBe(false);
     expect(screen.queryByText(/添加 Agent/)).not.toBeInTheDocument();
+    expect(screen.getByTestId('sidebar-image-conversation-cloud-conversation'))
+      .toHaveAttribute('aria-current', 'page');
+
+    fireEvent.click(screen.getByRole('button', { name: '新建设计会话' }));
+    await waitFor(() => expect(hostApiFetchMock).toHaveBeenCalledWith(
+      '/api/works/image-workspace/workspaces/cloud-project/conversations',
+      expect.objectContaining({ method: 'POST' }),
+    ));
+    expect(await screen.findByTestId('sidebar-image-conversation-cloud-conversation-two'))
+      .toHaveAttribute('aria-current', 'page');
+    fireEvent.click(screen.getByTestId('sidebar-image-conversation-cloud-conversation'));
+    await waitFor(() => expect(screen.getByTestId('sidebar-image-conversation-cloud-conversation'))
+      .toHaveAttribute('aria-current', 'page'));
 
     fireEvent.click(screen.getByTestId('sidebar-create-image-project'));
     expect(screen.getByRole('dialog', { name: '新建设计项目' })).toBeInTheDocument();
@@ -456,8 +526,16 @@ describe('Sidebar project initialization flow', () => {
     const summary = {
       workspaceId: 'local-project',
       title: '概念设计',
-      turnRevision: 0,
       viewRevision: 0,
+      conversationCount: 1,
+      phase: 'shaping',
+      updatedAt: '2026-07-31T10:00:00Z',
+    };
+    const conversation = {
+      conversationId: 'local-conversation',
+      workspaceId: 'local-project',
+      title: '主会话',
+      turnRevision: 0,
       phase: 'shaping',
       brief: {
         version: 0,
@@ -467,8 +545,11 @@ describe('Sidebar project initialization flow', () => {
         ready: false,
         missingDecision: '作品形式',
       },
+      createdAt: '2026-07-31T10:00:00Z',
       updatedAt: '2026-07-31T10:00:00Z',
+      messages: [],
     };
+    const { messages: _messages, ...conversationSummary } = conversation;
     let bootstrap = {
       capabilities: {
         conversation: true,
@@ -483,7 +564,10 @@ describe('Sidebar project initialization flow', () => {
         return { success: true, data: bootstrap };
       }
       if (path === '/api/works/image-workspace/workspaces/local-project' && !init?.method) {
-        return { success: true, data: { ...summary, messages: [] } };
+        return { success: true, data: { ...summary, conversations: [conversationSummary] } };
+      }
+      if (path === '/api/works/image-workspace/workspaces/local-project/conversations/local-conversation') {
+        return { success: true, data: conversation };
       }
       if (path === '/api/works/image-workspace/workspaces/local-project/tasks') {
         return { success: true, data: [] };
@@ -493,11 +577,25 @@ describe('Sidebar project initialization flow', () => {
           ...summary,
           workspaceId: 'local-project-two',
           title: '角色设计',
-          messages: [],
+          conversations: [{
+            ...conversationSummary,
+            workspaceId: 'local-project-two',
+            conversationId: 'local-conversation-two',
+          }],
         };
         bootstrap = { ...bootstrap, workspaces: [created, ...bootstrap.workspaces] };
         return { success: true, data: created };
       }
+      if (path === '/api/works/image-workspace/workspaces/local-project-two/conversations/local-conversation-two') {
+        return {
+          success: true,
+          data: {
+            ...conversation,
+            workspaceId: 'local-project-two',
+            conversationId: 'local-conversation-two',
+          },
+        };
+      }
       throw new Error(`Unexpected path ${path}`);
     });