Refactor orientation logic when entering fullscreen to better handle
button-initiated vs gesture-initiated transitions:
- Consolidate orientation determination into a single expression that
considers whether fullscreen was initiated by button or gesture
- When initiated by button, always use rotateToLandscapeOnEnterFullScreen
preference
- When initiated by gesture, respect current device orientation if already
in landscape, otherwise use preference
- Apply .landscape lock only for button-initiated transitions, .all for
gesture-initiated (when not orientation locked)
This provides more intuitive behavior where button taps rotate to preferred
orientation, while gestures respect current device orientation.
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Co-Authored-By: Claude <noreply@anthropic.com>
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