onSkipToNext/onSkipToPrevious forwarded a bare next/previous to Rust, which
always advanced the queue. Correct for music, wrong for a video whose audio is
running through a background-audio handoff (UR-040): pressing skip to re-hear a
line jumped to the next episode instead of scrubbing.
resolve_skip_action in player/seek.rs maps the command to Advance or SeekTo, and
is_background_audio_active() is the whole test — the handoff exists only for
video, and an episode played through it reports MediaType::Audio, so media type
cannot distinguish the case. Forward 30s, back 10s, both clamped to [0, duration]
so a skip near either end cannot seek negative or read as EOF and advance.
Routed through the same spawn-then-seek_absolute path as the scrubber, because a
handoff seek re-opens the stream and must not run under the blocking lock
(DR-159). Kotlin keeps sending the opaque command; it only gains FAST_FORWARD/
REWIND in the PlaybackStateCompat so the system stops drawing skip arrows for a
control that scrubs. The remote-volume action block is deliberately untouched:
the handoff never applies to cast sessions, where skip really does mean advance.
Tests written first and watched fail (left: Advance, right: SeekTo). 706 Rust
tests pass, clippy 0, coverage 90%.
Move the pure determine_video_seek_strategy function and its VideoSeekStrategy
enum (plus the 5 seek-strategy unit tests) out of the command layer into
player/seek.rs, where they belong and are testable without the Tauri State
harness. commands/player.rs now imports them from crate::player. No behavior
change.
dtourolle