Update app.py

app.py

@@ -181,23 +181,24 @@ def build_answer(query: str) -> str:
 def chat_respond(message: str, history):
     answer = build_answer(message)
 
-    # Convert Gradio history (list of dicts) OR tuples into safe message list
-    cleaned_history = []
+    # Normalize history into the format ChatInterface expects
+    normalized = []
 
     if isinstance(history, list):
-        for m in history:
-            if isinstance(m, dict):  # already the new format
-                cleaned_history.append(m)
-            elif isinstance(m, tuple) and len(m) == 2:
-                cleaned_history.append({"role": "user", "content": m[0]})
-                cleaned_history.append({"role": "assistant", "content": m[1]})
+        for item in history:
+            if isinstance(item, dict):
+                normalized.append(item)
+            elif isinstance(item, tuple) and len(item) == 2:
+                normalized.append({"role": "user", "content": item[0]})
+                normalized.append({"role": "assistant", "content": item[1]})
 
     # Append new messages
-    cleaned_history.append({"role": "user", "content": message})
-    cleaned_history.append({"role": "assistant", "content": answer})
+    normalized.append({"role": "user", "content": message})
+    normalized.append({"role": "assistant", "content": answer})
+
+    # MUST return: (string_answer, list_of_dict_messages)
+    return answer, normalized
 
-    # ChatInterface expects just the answer, NOT a tuple for the reply
-    return answer, cleaned_history
 
 
 # -----------------------------