Enhanced UI and background

Improved UI

Improved UI

Switch to gemini-3.5-flash

Migrate from deprecated google-generativeai to google-genai SDK

Upgrade google-generativeai to latest; use gemini-1.5-flash

Switch Gemini model to gemini-1.5-flash (free tier compatible)

Fix openai-whisper build: pin setuptools<70 and use --no-build-isolation

Add setuptools for openai-whisper pkg_resources build dependency

Remove Whisper pre-bake from build — download at runtime to avoid build timeout

fix: add HF Spaces README with docker sdk config

initial: Chatbot Service