feat: loop inline mp4 videos in note cards

[barrydeen]

Summary

• Inline MP4 videos rendered inside RichContent note cards now auto-repeat (Player.REPEAT_MODE_ONE).
• Applied to both InlineVideoPlayerWithFullscreen and InlineVideoPlayer, including the PiP-reclaimed player path so reclaim from picture-in-picture also loops.
• Fullscreen and audio playback paths are untouched.

Test plan

• Open a note containing an MP4 — confirm it loops on completion when autoplay is on.
• Tap to play an MP4 with autoplay disabled — confirm it loops once started.
• Enter PiP from fullscreen, return to inline — confirm reclaimed player still loops.
• Verify fullscreen video still ends/pauses normally (not affected by this change).
• Verify audio playback is unchanged.