Fix: respond() now returns history list pairs (tuples), not raw strings

Full dark CSS: gradient hero, stats bar, styled chat bubbles, purple accents, clickable example buttons

Fix Gradio 6.0: removed css from Blocks, removed show_api from launch

Minimal Gradio 6.0 compatible build — no deprecated params

Gradio 6.0 compatibility fix: moved css/theme to launch, removed bubble_full_width

Dark theme with proper contrast: white text on black background

Redesign with high-contrast light theme

Fix theme parameter crash

Add Gradio app with tool calling demo

Upload app.py with huggingface_hub