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).
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