Update app.py

app.py

@@ -482,134 +482,8 @@ with st.sidebar:
     st.caption("Made with ❤️ for H2 Physics students | Powered by Groq AI")
 
 
-# Main Chat Interface
-if "messages" not in st.session_state:
-    st.session_state.messages = [
-        {"role": "system", "content": SYSTEM_INSTRUCTIONS},
-        {"role": "assistant", "content": "**Hello JPJC Physics students! I'm Richard Feynman, ready to help you master H2 Physics!** ⚛️\n\nI can:\n- 📊 **Plot graphs** using Python (ask me to plot any physics equation!)\n- 🖼️ **Find diagrams** through web search  \n- 💬 **Explain concepts** with analogies\n- ❓ **Ask questions** to test your understanding\n\n**What would you like to learn today?**"}
-    ]
-
-# Title and mode indicator
-st.title("⚛️ H2 Physics Feynman Tutor")
-st.caption(f"**Topic:** {topic} | **Mode:** {'Text + Image' if visual_content else 'Text'} | **Powered by Groq AI**")
-
-# Display chat history
-for message in st.session_state.messages:
-    if message["role"] != "system":  # Don't show system messages
-        display_message(message["role"], message["content"], enable_voice)
-
-# Chat input
-user_input = st.chat_input("Type your physics question here...")
-
-# Process user input
-if user_input or visual_content:
-    # Prepare user message
-    user_message = ""
-    if user_input:
-        user_message += user_input + " "
-    if visual_content:
-        user_message += "[I've uploaded an image related to physics. Please analyze it.] "
-    if topic != "General / Any":
-        user_message += f"(Focus on: {topic})"
-    
-    # Add user message to history
-    st.session_state.messages.append({"role": "user", "content": user_message})
-    
-    # Display user message
-    with st.chat_message("user"):
-        if user_input:
-            st.markdown(user_input)
-        if visual_content:
-            st.image(visual_content, caption="Uploaded Image", use_column_width=True)
-            st.caption("📸 Image attached for analysis")
-    
-    # Check for API key
-    if not api_key:
-        st.error(
-            "**❌ Groq API Key Required**\n\n"
-            "Please enter your Groq API Key in the sidebar to continue.\n\n"
-            "**How to get one (FREE):**\n"
-            "1. Go to [console.groq.com](https://console.groq.com)\n"
-            "2. Sign up (free, no credit card needed)\n"
-            "3. Navigate to API Keys\n"
-            "4. Create a new key\n"
-            "5. Copy and paste it in the sidebar\n\n"
-            "**Free Tier:** 10,000 requests/month\n"
-            "**Perfect for testing!** ⚡"
-        )
-        st.stop()
-    
-    # Prepare API call
-    try:
-        # Build conversation context
-        conversation_context = []
-        
-        # Add system message
-        conversation_context.append({"role": "system", "content": SYSTEM_INSTRUCTIONS})
-        
-        # Add recent conversation (last 8 messages for context)
-        recent_messages = st.session_state.messages[-8:]
-        for msg in recent_messages:
-            if msg["role"] != "system":  # Don't duplicate system message
-                conversation_context.append(msg)
-        
-        # Call Groq API
-        with st.spinner("Feynman is thinking... ⚛️"):
-            response_text = call_groq_api(api_key, conversation_context)
-        
-        # Handle response
-        if response_text:
-            # Check for error messages
-            if response_text.startswith("❌") or response_text.startswith("⚠️"):
-                st.error(response_text)
-                if "Invalid API Key" in response_text:
-                    st.info(
-                        "**Fix Invalid API Key:**\n"
-                        "1. Go to [console.groq.com](https://console.groq.com)\n"
-                        "2. Check your API keys\n"
-                        "3. Make sure you're using the correct key\n"
-                        "4. Keys start with: `gsk_`"
-                    )
-            else:
-                # Add assistant response to history
-                st.session_state.messages.append({"role": "assistant", "content": response_text})
-                
-                # Display response
-                display_message("assistant", response_text, enable_voice)
-                
-                # Show token estimate
-                estimated_tokens = len(response_text) // 4
-                st.caption(f"📝 Response length: ~{estimated_tokens} tokens | ⚡ Powered by Groq")
-        else:
-            st.error(
-                "**Failed to get response from Groq API.**\n\n"
-                "Possible reasons:\n"
-                "1. **Rate Limit** - Free tier has limits, wait a moment\n"
-                "2. **Service Down** - Groq might be experiencing issues\n"
-                "3. **Network Issue** - Check your connection\n\n"
-                "Try again in a moment."
-            )
-            
-    except Exception as e:
-        st.error(
-            f"**❌ Unexpected Error**\n\n"
-            f"```python\n{str(e)[:200]}\n```\n\n"
-            f"**Troubleshooting:**\n"
-            f"1. Refresh the page\n"
-            f"2. Check your API key\n"
-            f"3. Clear chat and try again\n"
-            f"4. Visit [status.groq.com](https://status.groq.com) for service status"
-        )
-
-
-# Footer - FIXED VERSION
-
+# Footer - SUPER SIMPLE VERSION
 st.divider()
-footer_html = """
-<div style="text-align: center; color: #888; font-size: 0.9em;">
-    <p><strong>H2 Physics Feynman Tutor</strong> | Singapore H2 Physics (9478) Syllabus</p>
-    <p>Powered by <a href="https://groq.com" target="_blank">Groq AI</a></p>
-    <p style="font-size: 0.8em;">Disclaimer: This is an AI tutoring assistant. Always verify with official syllabus documents.</p>
-</div>
-"""
-st.markdown(footer_html, unsafe_allow_html=True)
+st.markdown("**H2 Physics Feynman Tutor** | Singapore H2 Physics (9478) Syllabus")
+st.markdown("Powered by [Groq AI](https://groq.com)")
+st.markdown("*Disclaimer: AI tutoring assistant. Verify with official syllabus.*")