Fix ValueError: Language plaintext not supported. in gr.Code

Fix UI compilation issues, rename app to Saffan Chat, add AI Persona & Skill presets

Initialize chatbot state to list and add safety checks for NoneType history in Gradio 5

Set Chatbot type to tuples for Gradio 5 compatibility

Deploy premium Claude-style LLM chatbot with web search, scraping, memory, and access control