Deckback v0.0.3

Added

• L2/R2 chapter seek: the triggers now jump to the previous/next chapter of the playing video
  (chapter boundaries fetched from YouTube's TVHTML5 /next endpoint and cached per video). Videos
  without chapters — or a press before the chapter data has arrived — fall back to the fixed
  ±skip_seconds jump introduced alongside (configurable in app.json).

Fixed

• Launcher CDP requests no longer all time out instantly once the Deck has been up for ~25 days
  (a 32-bit monotonic-clock truncation in the DevTools socket deadline).

Changed

• Slimmed the engine build: ~40 feature-off GN args (WebGPU/Dawn backends, SwiftShader, Vulkan, VR,
  TFLite/WebNN, printing/PDF/plugins, chromoting, WebRTC call codecs, HLS/MPEG2-TS, HSTS preload
  list, qt/gtk shims) plus a patch dropping content_shell's web-test harness. Stripped engine binary
  193.4 → 175.0 MB (−9.5%); libvk_swiftshader.so (29.4 MB) no longer ships; ~11% fewer compile
  units per build. Playback-critical paths (VP9/H.264/HEVC, software-VP9 fallback, AV1 steering,
  VA-API, Widevine hooks, voice-search mic capture) are unchanged; verified by the headless Leanback
  smoke gate. On-Deck re-verification of hardware decode is pending
  (.internal/findings/durable/build-slimming.md).

Development

• CI/local parity gate (just preflight): one script (scripts/preflight.sh) now defines the
  pre-push and pre-release checks — shellcheck, the harness suite, clang-format-18, and the launcher
  gcc/clang builds — and both .githooks/pre-push and CI (.github/workflows/lint.yml) call it, so
  a local push and a CI run can no longer diverge. just release refuses to build unless the tagged
  commit is green in CI. Run just hooks once per clone. See
  .internal/findings/durable/preflight-parity.md.