Move CSS, JS, favicon files to static/ directory to separate
compiled-in assets from Askama templates. Update all include paths,
build.rs, flake.nix, and Tailwind @source directives.
- Create shared tab_bar.html partial with desktop + mobile layouts
- Add CSS component classes (.tab, .tab-active, .tab-mobile variants)
- Replace divergent implementations in data.html and add.html
- Rename DataTab to Tab for shared use across templates
- Improve readability: darker inactive text, more spacing, hover states
Replace the checked-in styles.css with a build-time Tailwind CSS
pipeline. input.css defines CSS custom properties for light/dark
themes, mapped to Tailwind utilities via @theme. build.rs runs
the Tailwind CLI to generate styles.css at compile time.