chatbot fix sherika

phase/Student_view/chatbot.py

@@ -60,22 +60,25 @@ def _reply_with_hf():
     if "client" not in globals():
         raise RuntimeError("HF client not initialized")
 
-    # Build single instruction string FLAN-T5 prefers
     convo = _format_history_for_flan(st.session_state.get("messages", []))
     prompt = f"{TUTOR_PROMPT}\n\n{convo}\n\nTutor:"
 
     try:
-        response = client.text2text_generation(
-            prompt,
-            max_new_tokens=220,
-            temperature=0.2
+        response = client.post(
+            json={
+                "inputs": prompt,
+                "parameters": {"max_new_tokens": 220, "temperature": 0.2},
+            }
         )
-        if isinstance(response, dict) and "generated_text" in response:
-            return (response["generated_text"] or "").strip()
+        # Handle both list-of-dicts and dict formats
+        if isinstance(response, list) and "generated_text" in response[0]:
+            return response[0]["generated_text"].strip()
+        elif isinstance(response, dict) and "generated_text" in response:
+            return response["generated_text"].strip()
         elif isinstance(response, str):
             return response.strip()
         else:
-            raise ValueError(f"Unexpected response format: {type(response)}")
+            raise ValueError(f"Unexpected response format: {response}")
     except Exception as e:
         err_text = ''.join(traceback.format_exception_only(type(e), e)).strip()
         raise RuntimeError(f"Hugging Face API Error: {err_text}")