- drop backdrop-filter from .game tiles (likely cause of a freeze-on-load
bug on heavy uncached loads) and harden tile sizing so it can't balloon
regardless; fix some long-dead CSS selectors along the way (mobile
breakpoints were silently never applying)
- strip AdSense in-feed ads if they try to inject into the games grid
- top games / starred / recently played now only show a section if
something inside it still matches the current search or tag filter,
instead of leaving orphaned tiles with no header or stale clutter
- remove the proxy nav card from home (dead now that it's disabled)
- delete cookie.js and savedownload.js, confirmed fully unreferenced
dead code superseded by the save/load flow already in settings.html
