Pressing Menu while scrubbing now discards the pending scrub and leaves
playback time unchanged, instead of committing the seek via the
focus-loss path.
tvOS rasterizes Siri Remote touchpad swipes into discrete onMoveCommand
events at ~300-400ms, so a fast swipe and a single tap delivered the
same fixed step. Track gap between events: rapid same-direction events
(under 500ms) build a streak that multiplies the step via a power curve,
while deliberate taps still land on the base step.
Pressing left/right on the focused progress bar now triggers the same
accumulating 10s seek as the hidden-controls flow, but updates the
visible scrubber in place with no overlay. Both tvOS arrow-seek paths
accumulate a signed net offset so a reverse press subtracts from the
pending amount instead of restarting from the current playback time.
Extract shared TimeInterval.formattedAsTimestamp replacing 8 identical
formatTime/formattedTime implementations across player views. Remove
unused currentTime parameter from GestureSeekPreviewView. Consolidate
duplicated geometry math in MacOSControlBar into seekPreviewPosition().
