Refactor AI chat: streaming, tool calls, UI polish

apps/admin/src/components/AiChat/provider.integration.test.ts

@@ -39,6 +39,37 @@ describe('AI chat SSE message reducer', () => {
     expect(message.toolRuns[0]).toMatchObject({ status: 'success', summary: '找到 1 条记录' });
   });
 
+  it('tracks processed attachments and final feedback state', () => {
+    let message = reduceAiSseMessage(undefined, {
+      event: 'attachment.processed',
+      data: JSON.stringify({
+        attachment: {
+          id: 4,
+          name: '名单.xlsx',
+          mimeType: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+          size: 1200,
+          status: 'ready',
+          url: '/api/ai/chat/attachments/4',
+          createdAt: '2026-07-24T00:00:00.000Z',
+        },
+      }),
+    });
+    message = reduceAiSseMessage(message, {
+      event: 'message.completed',
+      data: JSON.stringify({
+        message: {
+          id: 12,
+          content: '完成',
+          reasoningContent: null,
+          feedback: 'like',
+          attachments: message.attachments,
+        },
+      }),
+    });
+    expect(message.attachments).toHaveLength(1);
+    expect(message.feedback).toBe('like');
+  });
+
   it('uses final content and records cancellation and errors', () => {
     let message = reduceAiSseMessage(undefined, {
       event: 'message.completed',