v0.5.0 — Mobile feed filtering, collections fix, cross-browser support

• Filtering now works on the mobile single-item feed (when you open an album on mobile and scroll through inlined "next" albums). Hide photo-only albums with Videos-only, or hide by title keyword. The album you actually navigated to is never filtered.
• /user/collections is no longer touched by the filter. Saved collection pages render exactly as the site delivers them.
• Settings now reliably opens the options page from both the toolbar popup and the in-page overlay.
• Internal: surface-aware adapter so future site changes are easier to absorb without breaking the desktop grid.
• This version is also published to the Chrome Web Store; the codebase is now fully cross-browser.

Your saved blocklists, highlights, and categories carry over from v0.4.0 untouched.

Changes:

Infinite scroll filtering now handles multiple sibling #albums feed sections by scanning all recognized roots and observing #page with document.body fallback. The single-root assumption was removed from content/site.js and content/main.js.
Highlights are stronger, thumbnail-only, and pulsing, with configurable color and intensity via schema v5 in shared/config.js, CSS custom properties in content/ui/styles.css, and controls in options/options.html and options/options.js.
Added simple categories management with id, name, term, favorite, favorites-first alphabetical ordering, same-tab open, clear new-tab action, edit, and delete. The in-page categories sheet is in content/ui/floating.js; settings-page management is in the options files.