With the rail collapsed and Libraries expanded, DOWN from the header landed on a mounted but focus-excluded library node and was swallowed, trapping traversal; the focus order now matches the render exclusion and traversal scans past non-focusable candidates.
An action bar rebuilding on count change disposed every node, silently dropping focus and never notifying the TV host; bindings are now reused by stable identity (external focus node, else debugLabel) and the transition is reported. Positional reuse remains the only option for an unlabeled action, but it applies only while the action-list shape is provably unchanged - catalog detail enrichment inserting Request before a focused Trailer used to hand Trailer's focused binding, focus ring and next Select included, to Request. Those actions also carry stable debugLabels so their focus survives enrichment.
The text field consumed back on KeyDown outside the shared handler, letting one press act twice. It now marks the back coordinator like handleBackKeyAction does and keeps the down-only shape solely on TV, where the closing IME session swallows the matching KeyUp. Because onBack can move focus (empty search field -> sidebar), the orphaned KeyUp would otherwise drive app-level back on the new focus chain, so the field arms BackKeyUpSuppressor; the suppressor gained a hardware-level KeyUp observer that clears the armed state in a microtask after the press ends, removing the long-documented pinning hazard where an unconsumed KeyUp left it swallowing the next press.
Bare Backspace and Home are player navigation keys, but they are also
caret editing keys. The player screen's Focus wraps its OverlaySheetHost,
so it saw them before the subtitle-search field could act: the press was
consumed on key-down, DefaultTextEditingShortcuts never turned it into a
deletion, and the back pipeline hid the chrome and then left the player.
A focused text editor now takes both keys back, but only for physical
keyboard presses — a synthesized dpad/gamepad press has no caret, and
browserHome has no editing role at all.
The screen also resolved its overlay-sheet controller from the State's
own context, which sits above the host it was querying, so the lookup
always returned null and Back skipped the sheet stage entirely. Resolve
it from a context below the host instead, matching NowPlayingScreen.
close#1741
edde746