fix(studio): clamp playhead to composition duration in RAF loop

The studio player's RAF loop in useTimelinePlayer notified the playhead
position via liveTime.notify(time) before checking the duration limit.
When adapter.getTime() returned a value past the composition's
data-duration (due to timing drift or delayed duration calculation),
the playhead would visually overshoot — showing e.g. 0:19 on a 0:10
composition.

The web player component already had this clamping (playback-state.ts
line 42, direct-timeline-clock.ts line 56), but the studio player's
forward loop was missing it.

Fix: clamp time to dur before notifying, matching the pattern already
used in the web player: Math.min(rawTime, dur) when dur > 0.

packages/studio/src/player/hooks/useTimelinePlayer.ts

@@ -226,8 +226,9 @@ export function useTimelinePlayer() {
     const tick = () => {
       const adapter = getAdapter();
       if (adapter) {
-        const time = adapter.getTime();
+        const rawTime = adapter.getTime();
         const dur = adapter.getDuration();
+        const time = dur > 0 ? Math.min(rawTime, dur) : rawTime;
         liveTime.notify(time); // direct DOM updates, no React re-render
         const { inPoint, outPoint } = usePlayerStore.getState();
         const rawLoopEnd = outPoint !== null ? outPoint : dur;