Update app.py

app.py

@@ -39,19 +39,21 @@ def image_to_ascii(image_path, width=100):
     return "\n".join(ascii_lines)
 
 # =========================
-#  CHAT FUNCTION
+#  CHAT FUNCTION (WITH HISTORY FIX)
 # =========================
 
 def chat_fn(message, history, mode="Normal Chat", model=DEFAULT_MODEL, image=None, include_ascii=False):
     try:
         messages = [{"role": "system", "content": MODE_PROMPTS.get(mode, MODE_PROMPTS["Normal Chat"])}]
 
-        # Add chat history
-        for user_msg, assistant_msg in history:
-            if user_msg:
-                messages.append({"role": "user", "content": user_msg})
-            if assistant_msg:
-                messages.append({"role": "assistant", "content": assistant_msg})
+        # SAFELY process history (fixes "too many values to unpack")
+        for pair in history:
+            if isinstance(pair, list) and len(pair) == 2:
+                user_msg, assistant_msg = pair
+                if isinstance(user_msg, str) and user_msg.strip():
+                    messages.append({"role": "user", "content": user_msg})
+                if isinstance(assistant_msg, str) and assistant_msg.strip():
+                    messages.append({"role": "assistant", "content": assistant_msg})
 
         # If image uploaded + toggle ON → convert to ASCII
         if image and include_ascii: