v0.23.1

SimAction::rotate_smooth distributes encoder detents by an ease curve instead of fixed intervals, letting tests reproduce realistic accelerate / decelerate patterns rather than the always-equal tempo of SimAction::rotate.

Added

• SimAction::rotate_smooth(ticks, total_ms, ease_fn) (src/event/sim.rs): distributes ticks detents across total_ms according to ease_fn(elapsed / total_ms) ∈ [0, 1]. ease::linear reproduces the legacy fixed-tempo path; ease_in_out_cubic and similar back-loaded curves emit detents slowly at start, accelerate through the middle, and decelerate near the end. The Rotary events themselves are unchanged — only their wall-clock distribution shifts.

Changed

• RotateAction.ease_fn: Option<fn(Fixed) -> Fixed> (src/event/sim.rs): None keeps SimAction::rotate(...) running on the existing fixed-tempo path; Some is populated by SimAction::rotate_smooth(...).

Breaking

• RotateAction gains a public ease_fn field (src/event/sim.rs): callers constructing the struct via literal must add ease_fn: None for the legacy fixed-tempo behaviour, or switch to SimAction::rotate(...) / SimAction::rotate_smooth(...). Pattern-match destructuring should add .. to remain forward-compatible.