tiennm99 7d1bb5e68a fix(ui): four small bugs surfaced after the UI/UX merge
1. Settings gear was unclickable because H1's `drop-shadow` filter
   created a stacking context that painted the H1 over the absolutely-
   positioned trigger. Bump gear wrapper to z-10.
   (src/routes/+page.svelte)

2. Switch rows in settings had a dead zone — `<label>` wrapped a
   `<span role=switch>` (not a labelable element), so taps on the
   text fell through. Move role/click/keydown to the wrapping div
   so the whole row toggles. Pill stays decorative.
   (src/lib/SettingsButton.svelte)

3. Empty cells used `dark:[filter:brightness(...)]` which creates a
   per-cell stacking context — same hazard class as bug #1. Replace
   with a pointer-events-none overlay span (`hidden dark:block`).
   (src/lib/PlayerBoard.svelte)

4. Audio cache never evicted on voice swap, leaking ~92 Audio
   elements per change over a session. New `clearAudioCache()` in
   voice.js, called from `pickVoice` when the id actually changes.
   (src/lib/voice.js, src/lib/SettingsButton.svelte)

Tests 98/98 pass; build clean.
2026-04-27 09:51:49 +07:00
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Lô Tô (Vietnamese lottery bingo) number board — Next.js web app
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