- Change btn-adjust to grey border with orange text and subtle hover
- Add font-family/font-size to .input-field for consistency
- Redesign desktop tabs: bordered, orange text, equal width, accent
border on active instead of filled background
- Redesign mobile tab selector: bordered dropdown with orange text,
rounded container, subtle active background
- 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