feat: refine business chat workflow

tests/unit/business-guidance.test.ts

@@ -0,0 +1,24 @@
+import { describe, expect, it } from 'vitest';
+import {
+  appendBusinessResponseGuidance,
+  hasBusinessResponseGuidance,
+  stripBusinessResponseGuidance,
+} from '../../shared/business-guidance';
+
+describe('business response guidance', () => {
+  it('appends hidden business response guidance without changing the visible prompt', () => {
+    const message = appendBusinessResponseGuidance('生成昨日经营日报');
+
+    expect(message).toContain('生成昨日经营日报');
+    expect(message).toContain('智念业务员工');
+    expect(hasBusinessResponseGuidance(message)).toBe(true);
+  });
+
+  it('strips guidance for UI display and avoids duplicate blocks', () => {
+    const once = appendBusinessResponseGuidance('检查渠道房态');
+    const twice = appendBusinessResponseGuidance(once);
+
+    expect(stripBusinessResponseGuidance(twice)).toBe('检查渠道房态');
+    expect((twice.match(/\[\[YINIAN_BUSINESS_RESPONSE_GUIDANCE\]\]/g) ?? [])).toHaveLength(1);
+  });
+});