fix: use single-image wording for 1-image quote flow

tests/test_batch_quote_reply_format.py

@@ -61,6 +61,29 @@ class BatchQuoteReplyFormatTest(unittest.IsolatedAsyncioTestCase):
         self.assertIn("打包", reply)
         self.assertIn("共", reply)
 
+    async def test_single_image_reply_avoids_batch_wording(self):
+        agent = CustomerServiceAgent()
+        results = [
+            (
+                "https://img.alicdn.com/a.jpg",
+                {
+                    "complexity": "normal",
+                    "reason": "常规处理",
+                    "price_suggest": 20,
+                },
+            )
+        ]
+        reply = agent._build_batch_quote_reply(
+            results=results,
+            total_suggest=20,
+            bundle_price=20,
+            req_fee={"extra": 0, "hits": []},
+        )
+        self.assertIn("这张", reply)
+        self.assertNotIn("这批", reply)
+        self.assertNotIn("先给你分图报下", reply)
+        self.assertNotIn("可选：A", reply)
+
 
 if __name__ == "__main__":
     unittest.main(verbosity=2)