Refactor ZeroGPU handling and update documentation. Reduced default BORDERLESS_GPU_DURATION to 60 seconds in .env.example and README.md. Enhanced error messaging in app.js and gradio_api.js for better user feedback on quota issues. Updated GPU_DURATION logic in config.py to enforce minimum and maximum limits.

fix: messages shown in the chat UI

Add gradioStream SSE reader in gradio_api.js and wire runChat in app.js to live updates

Add Gradio API integration and refactor app.js. Introduced gradioPredict function for API calls, enhancing chat functionality and session management.