[xservzeroman]

First round of the UI review (handheld): faster and lighter, no change in look. From a code review of HandheldHomeActivity, Sw, QuickMenu, StatusCorner, DeviceApps, CustomArt.

Changelog

• Settings sidebar: focus moving through the groups no longer rebuilds the whole screen at each step (debounced 160 ms, groupRender).
• render() → renderPage(): allGames() is memoised for the duration of one render (it ran 3 times: Home row, wash, selected game).
• DeviceApps: in-memory pinned list, info() cache, installed() cache, icon LRU (64); refresh() on resume drops them for installs/updates meanwhile. Caches used from the picker's worker thread are synchronized maps.
• CustomArt: the set of keys with a picture is read from disk once (no per-tile SHA-1 + exists() per render); LRU sized in bytes (24 MB); colour per picture memoised.
• Add apps: the list and icons load on a worker thread; the chips reuse them (showPicker()).
• FocusGlide.pauseBreath()/resumeBreath(): the infinite breathing animator pauses in onPause.
• The global focus and scroll listeners are added once per window (treeHooked), not again on every buildShell() (rotation, fold).
• StatusCorner and the TV QuickMenu tick set text only when it changed.
• L1/R1 tab cycling includes the dev tab; focus-ring radii for chip: and app:.
• contentDescription on tiles, round buttons and Back.
• Build: test253. Lint: 0 errors. Stacked on feat(handheld): On this device, pick Android apps to show next to PC, PS5 and Xbox #100.

Not in this PR (need a look first)

Bigger items from the review, listed in the PR thread: 48 dp touch targets and font scaling on phones, one shared row builder, one QuickMenu palette for both apps, a recycled All games grid, keeping scroll position across background redraws.

To test

• Settings: hold Down through the groups: smooth, the list follows when focus rests.
• Home ↔ All games ↔ Add apps feel snappier; tiles with pictures and app icons still show.
• L1/R1 on All games reaches This .

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