fix: avoid duplicate greeting reply and improve fallback text

qingjian_cs/app/client.py

@@ -316,7 +316,20 @@ class QingjianClient:
     def _fallback_reply(self, action: str) -> str:
         if action == "transfer":
             return "我先给你转人工处理。"
-        return "我先看看"
+        if action == "quote":
+            return "我先给你找找看"
+        return "你直接说需求就行"
+
+    @staticmethod
+    def _is_greeting_only(text: str) -> bool:
+        t = re.sub(r"\s+", "", str(text or ""))
+        if not t:
+            return False
+        greetings = {
+            "你好", "您好", "在吗", "在不在", "哈喽", "hello", "hi", "嗨",
+            "有人吗", "在", "在嘛",
+        }
+        return t.lower() in greetings
 
     def _is_outbound_echo(self, data: dict, msg: str) -> bool:
         """
@@ -383,6 +396,21 @@ class QingjianClient:
             "last_reply": self.last_reply_key.get(key, ""),
             "recent_dialogue": recent_dialogue[-12:],
         }
+        # 首条已快速回复“在的”后，纯问候不再重复走AI回复
+        if self._is_greeting_only(merged_msg) and self.last_reply_key.get(key) == "在的" and not urls and int(context["pending_images"]) == 0:
+            activity_event(
+                self.logger,
+                "agent_process_skipped",
+                trace_id=trace_id,
+                customer_id=context["customer_id"],
+                reason="greeting_already_replied",
+            )
+            await post_tianwang_callback(
+                "message_processed",
+                data,
+                extra={"trace_id": trace_id, "route": "pre_sales", "action": "noop", "reply": ""},
+            )
+            return
         try:
             rd = context.get("recent_dialogue", []) or []
             rd_preview = " | ".join(