Add the Flick Replay home screen widget and responsive widget layouts

[ultraelectronica]

Summary

Adds a "Flick Replay" home screen widget that shows today's listening snapshot
and gives the existing widgets a shared responsive-layout and interaction polish
pass.

Flick Replay widget (new)

• New ReplayWidgetProvider renders today's listening snapshot — listening time,
  play count, day-over-day deltas, and today's top album covers — styled after the
  in-app Replay card. Four looks: Acid (default), Night, Signal, and Album, which
  tints the surface from today's top cover and picks a readable foreground +
  secondary/accent palette from measured contrast.
• The whole widget is tappable and deep-links to the Recap screen.
• Geometry is computed per widget size by WidgetLayoutPolicy.replay(...): it
  sizes the headline values, keeps the two metric columns readable, loses rear
  sleeves before sacrificing them, drops the comparison caption at short heights,
  and exposes a spoken content description (summary, deltas, and the open action).
• Artwork is drawn as one binder-bounded sleeve deck (WidgetReplayArtwork) with
  a rotation-contained ornament orbit, RTL-aware positioning, and a byte-bounded
  LRU cache; the widget is registered in the manifest with a resizable 4×2 provider.

Replay data sync (Dart)

• WidgetSyncService gains a Replay path: it watches listening history (debounced)
  plus a midnight timer, reads today's and yesterday's ListeningRecap, and
  publishes time/plays, percent deltas, and up to three local album covers to the
  shared widget state. Unchanged snapshots are skipped, refreshes are coalesced so
  a stale write cannot land, and a not-yet-ready database keeps the retry flag set
  instead of publishing misleading zeros.
• Writes invalidate the stored day first and publish it last, so a native refresh
  that races a write cannot mix yesterday's covers with today. A day-key mismatch
  makes the native widget render an empty state, so a stale snapshot never looks
  current. WidgetReplaySnapshot centralizes the local-only cover filter (native
  widgets cannot read remote/SAF URIs), the day key, and the clamped/unknown delta math.
• WidgetIntentHandler adds the flickwidget://recap/open intent, a
  generation-guarded native launch handshake (channel-ready inbox + detach
  acknowledgement) so taps arriving before/after the Dart handler are dispatched
  exactly once, and NavigationHelper.navigateToRecap for the destination.

Widget settings

• The widget settings screen gains a Replay tab with Acid/Night/Signal/Album look
  options. The choice persists through app preferences (widgetReplayLook,
  default acid) and is pushed to the widget immediately.

Responsive layouts and interaction polish

• New ResponsiveWidgetProvider base renders Android 12+ OPTION_APPWIDGET_SIZES
  variants (capped at 16) and portrait/landscape sizes for older launchers; the
  mini, flagship, compact, and replay providers all share it.
• Adds compact narrow/short/square layouts and a 110dp 2×2 target on API 31+
  while legacy launchers keep a 156dp minimum, restructures the flagship and mini
  layouts into included sub-layouts with a thumbnail-based mini player, and enables
  flagship resizing.
• Replaces static button ovals with ripple drawables for play/transport controls,
  adds an active-transport background and outline clipping, and adds accessibility
  strings for playback state and elapsed/duration labels.

Related issue

none

Checklist

• flutter analyze passes
• flutter test passes
• Rust changes: cargo test --manifest-path rust/Cargo.toml passes
• Built and ran the app if the change touches a playback path (flutter run --flavor full)
• Generated code regenerated and committed if bridge/drift/freezed models changed
• CHANGELOG.md updated for user-facing changes
• No secrets, keys, tokens, or machine-local files committed
• One change per PR; no unrelated reformatting in the same diff
• Hardware tested if the Rust audio engine or USB/DAC output changed