Refactor AI chat: streaming, tool calls, UI polish

apps/admin/src/components/AiChat/message-mappers.integration.test.ts

@@ -11,6 +11,18 @@ describe('AI chat history mapper', () => {
       status: 'completed',
       errorCode: null,
       createdAt: '2026-07-23T00:00:00.000Z',
+      feedback: 'like',
+      attachments: [
+        {
+          id: 8,
+          name: '考勤.pdf',
+          mimeType: 'application/pdf',
+          size: 100,
+          status: 'ready',
+          url: '/api/ai/chat/attachments/8',
+          createdAt: '2026-07-24T00:00:00.000Z',
+        },
+      ],
       toolRuns: [
         {
           toolCallId: 'tool-1',
@@ -24,6 +36,8 @@ describe('AI chat history mapper', () => {
     expect(mapped.status).toBe('success');
     expect(mapped.message.reasoningContent).toBe('思考');
     expect(mapped.message.toolRuns[0].summary).toBe('共 4 间');
+    expect(mapped.message.attachments).toHaveLength(1);
+    expect(mapped.message.feedback).toBe('like');
   });
 
   it('maps failed and cancelled history to X SDK statuses', () => {