* Implement voice message variable playback speed
* Move playback speed string to Untranslated
https://github.com/element-hq/element-x-ios/pull/5121#discussion_r2822631371
* Address review feedback for voice message playback speed
- Persist voice message playback speed as an enum in AppSettings instead of storing an index.
- Update playback speed cycling to derive from enum allCases and safely fall back to `.default` if the stored value cannot be resolved.
- Apply runtime speed updates in AudioPlayer only when the player is in the `.playing` state.
- Keep MediaPlayerProviderTests formatting/indentation style intact while retaining mock playback speed setup.
- Regenerate preview snapshots for:
- PlaybackSpeedButton
- VoiceMessageRoomPlaybackView
- VoiceMessageRoomTimelineView
* Move VoiceMessagePlaybackSpeed outside AppSettings, remove speedRatio
* Stabilize PlaybackSpeedButton width
* Sync voice-message speed label
- Add voiceMessagePlaybackSpeed to TimelineViewState and bind it from appSettings.$voiceMessagePlaybackSpeed.
- Pass that timeline-level speed into VoiceMessageRoomPlaybackView and use it for PlaybackSpeedButton, so labels update consistently across items.
- Use @EnvironmentObject in VoiceMessageRoomTimelineContent so the view re-renders when timeline context state changes.
- In WaveformInteractionModifier, add .allowsHitTesting(showCursor) to the cursor interaction view so hidden pre-playback cursor hit area does not steal taps from the speed button.
