Both anchored popups were small tap targets on phones. AppMenuButton
gains an opt-in adaptiveSheet flag that routes through
showAdaptiveAppMenu: full-width, untitled sheet rows on touch platforms
(phones plus Android TV / tvOS), the same anchored popup on desktop.
Grep-verified dead surface across shared widgets: the app-menu system's minWidth/maxWidth/childPadding/alignmentOffset knobs threaded through four layers with no caller ever passing them; FocusableListTile's suppressInitialSelect/hoverColor/textColor/iconColor machinery (~55 lines) reachable by no call site; OptimizedMediaImage.playlist with zero constructions; TvSpotlightBackground's primary-action button that neither caller can render; MediaGridDelegate.createDelegate whose only caller was a test (MediaGridGeometry.resolve is the single delegate composition now); and the CustomAppBar->Config->DesktopTopBar chain collapsed onto DesktopSliverAppBar with its ~11 never-passed passthrough params (snap kept — real callers pass it).
- PaginatedCardGridTabState: the collections and playlists tabs were 95%
identical; they now supply only pageSize/fetchPage/idOf instead of each
duplicating the grid, memo, inflation budget and focus wiring.
- EtagCachedRemoteStore: the anime-lists and fribb mapping stores now share
one download/cache/isolate-parse/conditional-GET lifecycle.
- FocusableTileStateMixin manages its own initState/didUpdateWidget/dispose
instead of requiring every caller to forward three lifecycle hooks.
Also drops unused ServerCapabilities entries and dead code in
focusable_list_tile and music/track_row.
edde746