feat: refine business chat workflow

tests/unit/chat-target-routing.test.ts

@@ -120,9 +120,10 @@ describe('chat target routing', () => {
     const sendCall = gatewayRpcMock.mock.calls.find(([method]) => method === 'chat.send');
     expect(sendCall?.[1]).toMatchObject({
       sessionKey: 'agent:research:desk',
-      message: 'Hello direct agent',
       deliver: false,
     });
+    expect((sendCall?.[1] as { message: string }).message).toContain('Hello direct agent');
+    expect((sendCall?.[1] as { message: string }).message).not.toContain('YINIAN_BUSINESS_RESPONSE_GUIDANCE');
     expect(typeof (sendCall?.[1] as { idempotencyKey?: unknown })?.idempotencyKey).toBe('string');
   });
 
@@ -182,7 +183,8 @@ describe('chat target routing', () => {
     };
 
     expect(payload.sessionKey).toBe('agent:research:desk');
-    expect(payload.message).toBe('Process the attached file(s).');
+    expect(payload.message).toContain('Process the attached file(s).');
+    expect(payload.message).not.toContain('YINIAN_BUSINESS_RESPONSE_GUIDANCE');
     expect(payload.media[0]?.filePath).toBe('/tmp/design.png');
   });
 
@@ -251,5 +253,6 @@ describe('chat target routing', () => {
     expect((sendCall?.[1] as { message: string }).message).toContain('[知识库上下文]');
     expect((sendCall?.[1] as { message: string }).message).toContain('handbook.docx');
     expect((sendCall?.[1] as { message: string }).message).toContain('Refunds are available within 7 days.');
+    expect((sendCall?.[1] as { message: string }).message).not.toContain('YINIAN_BUSINESS_RESPONSE_GUIDANCE');
   });
 });