feat(product-suite): improve multi-image AI writing

tests/test_ai.py

@@ -494,6 +494,7 @@ class AITests(TempDirMixin, unittest.TestCase):
             self.assertEqual(231, result["metadata"]["points_balance"])
             self.assertNotIn("image_base64", result)
             self.assertEqual("POST", calls[0][0])
+            self.assertEqual(1, len(calls))
             self.assertEqual(
                 "https://cmhub.example.com/api/v1/analyze/images",
                 calls[0][1],
@@ -504,6 +505,13 @@ class AITests(TempDirMixin, unittest.TestCase):
             self.assertTrue(payload["images"][0]["image_base64"].startswith("data:image/png;base64,"))
             self.assertTrue(payload["images"][1]["image_base64"].startswith("data:image/jpeg;base64,"))
             self.assertEqual({"temperature": 0.2}, payload["parameters"])
+            prompt = payload["prompt"]
+            self.assertIn("同一个商品项目", prompt)
+            self.assertIn("一组证据", prompt)
+            self.assertIn("禁止输出“图1/图2/第N张”", prompt)
+            self.assertIn("商品概述、可确认卖点、适用人群与场景、套图画面要求", prompt)
+            self.assertIn("待确认或避免编造的信息", prompt)
+            self.assertIn("可见差异", prompt)
             self.assertEqual((3, ai.CMHUB_VISION_READ_TIMEOUT_SECONDS), calls[0][2]["timeout"])
 
         self.assert_removed(temp_dir)