Fix: retrieval debug mode issue. (#6150)

### What problem does this PR solve?

#6139

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

agent/component/base.py

@@ -521,7 +521,7 @@ class ComponentBase(ABC):
             if u.lower().find("answer") >= 0:
                 for r, c in self._canvas.history[::-1]:
                     if r == "user":
-                        upstream_outs.append(pd.DataFrame([{"content": f"USER:{c}", "component_id": u}]))
+                        upstream_outs.append(pd.DataFrame([{"content": c, "component_id": u}]))
                         break
                 break
             if self.component_name.lower().find("answer") >= 0 and self.get_component_name(u) in ["relevant"]:

agent/component/retrieval.py

@@ -57,8 +57,7 @@ class Retrieval(ComponentBase, ABC):
         query = self.get_input()
         query = str(query["content"][0]) if "content" in query else ""
         lines = query.split('\n')
-        user_queries = [line.split("USER:", 1)[1] for line in lines if line.startswith("USER:")]
-        query = user_queries[-1] if user_queries else ""
+        query = lines[-1] if lines else ""
         kbs = KnowledgebaseService.get_by_ids(self._param.kb_ids)
         if not kbs:
             return Retrieval.be_output("")