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Miguel Ángel
f2c63ca424
* fix(core): a video's voice keeps pace with the playhead instead of trailing it A playing video is exempt from seek-based drift correction, because seeking resets its decoder and stutters. Nothing else corrected it, so a talking-head video that started a few frames late (92 ms measured in Studio) kept its voice behind the playhead for the whole clip, and further behind after each loop. Media sync now runs a video that drifts past the 40 ms sync tolerance 3% fast or slow (pitch preserved) until it is within 10 ms, then returns it to the authored rate. The rate is written only when steering starts or stops, since every rate change costs Chrome a frame; large jumps still hard-seek. Measured in Studio: 92 ms constant on main, about 10 ms steady with the fix. * fix(core): video steering holds through speed ramps and hard syncs Review follow-ups: steering inferred itself from the element's current rate, which a speed ramp moves every tick, so a ramped video stopped steering at the 40 ms tolerance instead of 10 ms; the direction is now kept per element. A hard-sync tick plays the authored rate, since its pre-seek offset is stale, and a rate that reads back at lower precision is not rewritten every tick. * test(core): pin clearing and write-once for video steering Review follow-up: nothing failed when the steering state was left uncleared on eviction or pause, or when the rate compare went back to strict equality. Tests now cover all three, and the sync-state test seam reports the steering map so the proxy's leak test sees it. * chore(core): format the video steering and keep its tolerance module-private * chore(core): shorten the video steering comment