Update utils.py

utils.py

@@ -44,25 +44,20 @@ def save_chat_history(history, filename=None):
         timestamp = datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
         filename = f"chat_history_{timestamp}.json"
     with open(os.path.join("history", filename), "w") as f:
-        json.dump(history, f, indent=4)
+        json.dump(history, f, indent=4, ensure_ascii=False)
     return filename
 
-def load_chat_history(filename):
+def list_chat_histories():
     """
-    Load conversation history from a JSON file.
+    List all chat history filenames.
     """
-    filepath = os.path.join("history", filename)
-    if os.path.exists(filepath):
-        with open(filepath, "r") as f:
-            return json.load(f)
-    else:
-        st.warning("No chat history found with that filename.")
-        return []
+    folder = "history"
+    os.makedirs(folder, exist_ok=True)
+    return [f for f in os.listdir(folder) if f.endswith(".json")]
 
-def list_chat_histories():
+def load_chat_history(filename):
     """
-    List all saved chat history filenames.
+    Load a specific chat history file.
     """
-    history_dir = "history"
-    os.makedirs(history_dir, exist_ok=True)
-    return sorted([f for f in os.listdir(history_dir) if f.endswith(".json")])
+    with open(os.path.join("history", filename), "r") as f:
+        return json.load(f)