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/image-workspace-route.test.ts

@@ -130,6 +130,8 @@ describe('AI design Main route boundary', () => {
     const workspace = {
       bootstrap: vi.fn().mockResolvedValue(bootstrap),
       createWorkspace: vi.fn().mockResolvedValue({ workspaceId: 'workspace-one' }),
+      createConversation: vi.fn().mockResolvedValue({ conversationId: 'conversation-one' }),
+      getConversation: vi.fn().mockResolvedValue({ conversationId: 'conversation/one' }),
       renameWorkspace: vi.fn(),
       getWorkspace: vi.fn(),
       submitMessage: vi.fn().mockResolvedValue({ workspaceId: 'workspace/one' }),
@@ -166,6 +168,43 @@ describe('AI design Main route boundary', () => {
       title: '角色设计',
     });
 
+    const createConversationResponse = createResponse();
+    await handleImageWorkspaceRoutes(
+      createRequest('POST', {
+        clientConversationId: 'client-conversation-one',
+        title: '第二会话',
+      }),
+      createConversationResponse.res,
+      new URL(
+        'http://127.0.0.1/api/works/image-workspace/workspaces/workspace%2Fone/conversations',
+      ),
+      ctx,
+    );
+    expect(workspace.createConversation).toHaveBeenCalledWith({
+      workspaceId: 'workspace/one',
+      clientConversationId: 'client-conversation-one',
+      title: '第二会话',
+    });
+    expect(createConversationResponse.json()).toMatchObject({
+      success: true,
+      data: { conversationId: 'conversation-one' },
+    });
+
+    const getConversationResponse = createResponse();
+    await handleImageWorkspaceRoutes(
+      createRequest('GET'),
+      getConversationResponse.res,
+      new URL(
+        'http://127.0.0.1/api/works/image-workspace/workspaces/workspace%2Fone/conversations/conversation%2Fone',
+      ),
+      ctx,
+    );
+    expect(workspace.getConversation).toHaveBeenCalledWith('workspace/one', 'conversation/one');
+    expect(getConversationResponse.json()).toMatchObject({
+      success: true,
+      data: { conversationId: 'conversation/one' },
+    });
+
     const messageResponse = createResponse();
     await handleImageWorkspaceRoutes(
       createRequest('POST', {
@@ -177,12 +216,13 @@ describe('AI design Main route boundary', () => {
       }),
       messageResponse.res,
       new URL(
-        'http://127.0.0.1/api/works/image-workspace/workspaces/workspace%2Fone/messages',
+        'http://127.0.0.1/api/works/image-workspace/workspaces/workspace%2Fone/conversations/conversation%2Fone/messages',
       ),
       ctx,
     );
     expect(workspace.submitMessage).toHaveBeenCalledWith({
       workspaceId: 'workspace/one',
+      conversationId: 'conversation/one',
       clientTurnId: 'turn-one',
       expectedTurnRevision: 3,
       message: '继续编辑',
@@ -221,12 +261,13 @@ describe('AI design Main route boundary', () => {
       }),
       confirmResponse.res,
       new URL(
-        'http://127.0.0.1/api/works/image-workspace/workspaces/workspace%2Fone/quotes/quote%2Fone/confirm',
+        'http://127.0.0.1/api/works/image-workspace/workspaces/workspace%2Fone/conversations/conversation%2Fone/quotes/quote%2Fone/confirm',
       ),
       ctx,
     );
     expect(workspace.confirmGeneration).toHaveBeenCalledWith({
       workspaceId: 'workspace/one',
+      conversationId: 'conversation/one',
       quoteId: 'quote/one',
       clientTurnId: 'turn-two',
       expectedTurnRevision: 4,
@@ -391,6 +432,7 @@ describe('AI design Main route boundary', () => {
           generationTask: {
             taskId: 'task-live',
             workspaceId: 'workspace/one',
+            conversationId: 'conversation/one',
             medium: 'image' as const,
             status: 'succeeded' as const,
             briefVersion: 1,
@@ -414,7 +456,7 @@ describe('AI design Main route boundary', () => {
       request,
       response as unknown as ServerResponse,
       new URL(
-        'http://127.0.0.1/api/works/image-workspace/workspaces/workspace%2Fone/events',
+        'http://127.0.0.1/api/works/image-workspace/workspaces/workspace%2Fone/conversations/conversation%2Fone/events',
       ),
       { imageWorkspace: { openWorkspaceEvents } } as unknown as HostApiContext,
     );
@@ -422,6 +464,7 @@ describe('AI design Main route boundary', () => {
     expect(handled).toBe(true);
     expect(openWorkspaceEvents).toHaveBeenCalledWith({
       workspaceId: 'workspace/one',
+      conversationId: 'conversation/one',
       afterEventId: 'session-one:6',
     });
     expect(response.statusCode).toBe(200);