- Unify login/register into single screen with tab switcher, logo, and themed inputs
- Redesign profile with header card, segmented theme toggle, icon-based menu, and bottom-sheet modals
- Add auth guard to alerts screen showing login prompt instead of 401 error
- Switch ImageBackground to explicit Image+View layering for reliable rendering
- Add dark mode background image switching in root layout
- Add dark mode override for recent-tag in PWA search view