Enhance Chat Support for Gradio/HF Spaces expertise

- Update Chat Support prompt for Gradio/HF Spaces technical guidance
- Change Chat Support model to meta-llama/llama-3.1-70b-instruct
- Update google/gemma-2-27b-it to google/gemma-3-27b-it
- Add openai/gpt-3.5-turbo to model list
- Update anthropic/claude-3-haiku to anthropic/claude-3.5-haiku
- Pre-populate URL grounding with HF documentation links

app.py

@@ -138,11 +138,12 @@ if __name__ == "__main__":
 
 # Available models
 MODELS = [
-    "google/gemma-2-27b-it",
+    "google/gemma-3-27b-it",
     "mistralai/mixtral-8x7b-instruct",
     "meta-llama/llama-3.1-70b-instruct",
-    "anthropic/claude-3-haiku",
-    "nvidia/nemotron-4-340b-instruct"
+    "anthropic/claude-3.5-haiku",
+    "nvidia/nemotron-4-340b-instruct",
+    "openai/gpt-3.5-turbo"
 ]
 
 def fetch_url_content(url):
@@ -394,13 +395,15 @@ def respond(message, chat_history, url1="", url2="", url3="", url4=""):
     grounding_context = get_grounding_context(grounding_urls)
     
     # Build enhanced system prompt with grounding context
-    base_system_prompt = """You are a helpful assistant specializing in creating chat UIs for HuggingFace Spaces. You help users configure assistants for education and research. Provide concise, practical advice about:
-- System prompts for different use cases (courses, research, tutoring)
-- Model selection (recommending google/gemma-2-27b-it as a great balance)
-- HuggingFace Space deployment tips
-- Customization options
+    base_system_prompt = """You are an expert assistant specializing in Gradio configurations for HuggingFace Spaces. You have deep knowledge of:
+- Gradio interface components and layouts
+- HuggingFace Spaces configuration (YAML frontmatter, secrets, environment variables)
+- Deployment best practices for Gradio apps on HuggingFace
+- Space settings, SDK versions, and hardware requirements
+- Troubleshooting common Gradio and HuggingFace Spaces issues
+- Integration with various APIs and models through Gradio interfaces
 
-Keep responses brief and actionable. Focus on what the user is specifically asking about."""
+Provide specific, technical guidance focused on Gradio implementation details and HuggingFace Spaces deployment. Include code examples when relevant. Keep responses concise and actionable."""
     
     enhanced_system_prompt = base_system_prompt + grounding_context
     
@@ -431,7 +434,7 @@ Keep responses brief and actionable. Focus on what the user is specifically aski
                 "Content-Type": "application/json"
             },
             json={
-                "model": "google/gemma-2-27b-it",
+                "model": "meta-llama/llama-3.1-70b-instruct",
                 "messages": messages,
                 "temperature": 0.7,
                 "max_tokens": 500
@@ -578,23 +581,23 @@ with gr.Blocks(title="Chat U/I Helper") as demo:
                     gr.Markdown("Add URLs to provide additional context for more informed responses")
                     chat_url1 = gr.Textbox(
                         label="URL 1",
-                        placeholder="https://example.com/context1",
-                        info="First URL for context"
+                        value="https://huggingface.co/docs/hub/en/spaces-overview",
+                        info="HuggingFace Spaces Overview"
                     )
                     chat_url2 = gr.Textbox(
                         label="URL 2", 
-                        placeholder="https://example.com/context2",
-                        info="Second URL for context"
+                        value="https://huggingface.co/docs/hub/en/spaces-config-reference",
+                        info="Spaces Configuration Reference"
                     )
                     chat_url3 = gr.Textbox(
                         label="URL 3",
-                        placeholder="https://example.com/context3",
-                        info="Third URL for context"
+                        value="https://huggingface.co/docs/hub/en/spaces-settings",
+                        info="Spaces Settings Documentation"
                     )
                     chat_url4 = gr.Textbox(
                         label="URL 4",
-                        placeholder="https://example.com/context4",
-                        info="Fourth URL for context"
+                        value="https://huggingface.co/docs/hub/en/spaces-sdks-gradio",
+                        info="Gradio SDK for Spaces"
                     )
                 with gr.Row():
                     submit = gr.Button("Send", variant="primary")