→ during a paused replay advances by one move (mirrors the Stop
button's existing forward-step semantics). ← decrements the
cursor and dispatches `UndoRequestEvent`, which the game's
`handle_undo` reads next frame to reverse its most-recent move
— hooking the existing undo system rather than replaying
forward from cursor 0 (every replay-applied move pushes to the
undo stack the same way a player move would, so undo is the
right reversal primitive).
Both accelerators are paused-only — backwards via a new
`step_backwards_replay_playback` in `replay_playback.rs` that
hard-gates with the same destructure pattern as
`step_replay_playback`. Pressing → during running playback or ←
at cursor 0 are silent no-ops; the player learns "pause first,
then arrow."
The mockup labels these `[← →] scrub` (continuous fast scan).
Single-move step is the closest behaviour shippable today —
continuous scrub would need either a key-held event source or
an internal speed-up loop. Footer hint reads
`[← →] step` to match what's wired rather than the aspirational
"scrub."
Footer hint extended in lockstep:
`[SPACE] pause/resume · [ESC] stop · [← →] step` — the
only-wired-keybinds discipline holds.
ReplayOverlayPlugin gains `add_message::<UndoRequestEvent>()`
defensively so the plugin can run under MinimalPlugins without
GamePlugin attached (idempotent registration; harmless when
GamePlugin is also present).
6 new tests (2 hint pins + 4 keyboard scenarios) + 1 helper-pin
update for the new hint string.
Pre-existing flake noted: `daily_challenge_plugin::tests::
check_system_fires_warning_event_only_once_per_day` is failing
because wall-clock UTC is currently within 30 minutes of
midnight, inside the daily-expiry warning window the test
asserts against. Verified pre-existing by stashing all changes
and re-running — failure persists. Same shape as the
`winnable_seed_search` flake the handoff documented earlier
this session: time-dependent, deterministically passes under
different clock conditions. Not introduced by this commit.
Clippy clean.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
funman300
e5c4f51a6e