Adds Safari-specific detection and initialization logic to better support audio and video playback, especially for cases where metadata is not loaded as expected. Implements fallback event listeners, user interaction triggers, and exposes an initialization helper to ensure the editor works reliably on Safari and iOS devices.
Implemented keyboard shortcuts for play/pause (Space), jump backward (ArrowLeft), and jump forward (ArrowRight) in the chapters editor. Shortcuts are disabled when typing in input fields to prevent interference with text entry.
