All text-dim values now meet 4.5:1 minimum contrast ratio against
their theme background. Midnight/Light text-muted also bumped from
borderline 4.42:1 to compliant. Colors stay on-hue — just brighter
(dark themes) or darker (light theme) to cross the threshold.
- Add accent-text and zap-text tokens to all 7 themes for proper contrast
on accent/zap-colored buttons (fixes white-on-light-accent in Catppuccin,
Nord Frost, Hackerman, Sepia, Gruvbox)
- Replace text-white → text-accent-text on all accent buttons (20+ instances)
- Replace text-white → text-zap-text on zap buttons
- Replace hover:text-white → hover:text-accent-text on follow/action buttons
- Replace bg-blue-500 → bg-accent in FountainCard (theme-aware)
- Remaining text-white is correct: overlays on bg-black, danger badges
- Replace Solarized (low contrast) with Sepia (warm coffee tones)
- Replace Tokyo Night with Nord Frost (cool blue-grey, brighter)
- Bookmark fetch uses single batch filter instead of one-by-one (much faster)
- Debounce bookmark publish to prevent race conditions with replaceable events