feat: standardize input styling with tier system, add depth and admin features
- Define 4 input tier CSS classes (input-standard, input-search, input-embedded, input-danger)
in globals.css, migrating ~50 inputs across ~28 component files to use them
- Add subtle border and inset shadow to solid input tiers for resting-state visibility
- Fix focus ring clipping in settings panel scroll container
- Fix phantom Tailwind tokens (border-border-primary, placeholder-txt-muted)
- Add admin user management panel, storage management, and account deletion utilities
Jannis Braun
836f0acef6