feat: align product suite prompts with reference images

tests/test_product_suite.py

@@ -168,11 +168,10 @@ class ProductSuiteTests(unittest.TestCase):
             template_text=template,
         )
         self.assertIn(
-            "参考图规则:使用第一張上傳圖作為主商品圖，其餘圖片只作為參考。",
+            "参考图规则:当前上传图片是本任务唯一主参考图；保持商品主体、款式、颜色和关键细节准确；不编造用户与参考图均未提供的信息。",
             single_primary,
         )
-        self.assertNotIn("当前上传图片是本任务唯一主参考图", single_primary)
-        self.assertNotIn("参考图规则：使用", single_primary)
+        self.assertNotIn("第2至", single_primary)
 
         settings["per_image_primary"] = True
         per_image_primary = product_suite.build_suite_prompt(
@@ -187,9 +186,23 @@ class ProductSuiteTests(unittest.TestCase):
             "参考图规则:当前上传图片是本任务唯一主参考图；保持商品主体、款式、颜色和关键细节准确；不编造用户与参考图均未提供的信息。",
             per_image_primary,
         )
-        self.assertNotIn("使用第一張上傳圖作為主商品圖", per_image_primary)
+        self.assertNotIn("第2至", per_image_primary)
         self.assertNotIn("序号2", per_image_primary)
 
+        multi_reference = product_suite.build_suite_prompt(
+            "卖点",
+            product_suite.default_suite_settings(),
+            "场景图",
+            "51100639510",
+            reference_asset_count=2,
+            template_text=template,
+        )
+        self.assertIn(
+            "参考图规则:第1张为主商品图，请保持其主体、款式、颜色和关键细节准确；第2至3张仅作为风格、构图、场景或排版参考，不得替换主商品；不编造用户与参考图均未提供的信息。",
+            multi_reference,
+        )
+        self.assertEqual(7, product_suite.reference_asset_count({}, 9))
+
     def test_product_suite_template_validation_and_custom_category_rendering(self):
         default_text = prompts.load_default_product_suite_prompt()
         self.assertEqual([], product_suite.product_suite_prompt_errors(default_text))