Fix circuit graph visuals: remove node outlines, softer edges, theme-aware layer labels, reduce grid, black text for all labels/legend/ticks

Theme-aware colors: replace all hardcoded dark colors with get_theme_colors() utility for proper light/dark mode

Update API key and migrate model from qwen2.5-vl-72b to qwen3-vl-30b-a3b-instruct

Force dark mode theme for app

Add vectors with LFS2

Deploy static demo