fix(macos): preserve overlay on transient tracker loss; fix subsync modal open (#66)

changes/fix-macos-overlay-minimize-tracking.md

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+type: fixed
+area: overlay
+
+- Fixed macOS overlay tracking so transient mpv window misses no longer hide the overlay; minimizing mpv still hides it.

changes/fix-macos-overlay-passthrough.md

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+type: fixed
+area: overlay
+
+- Fixed macOS overlay passthrough so mpv controls remain clickable before hovering subtitle bars.

changes/fix-subsync-modal-window.md

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+type: fixed
+area: overlay
+
+- Fixed subtitle sync modal opens so macOS no longer flashes and hides the first modal attempt or leaves stale modal state after syncing.