feat: Rebrand to OZSync and translate UI to English
- Renamed application from ZimaOS Sync to OZSync globally
- Translated all Chinese UI text to English in status bar and settings
- Updated manifest.json, README.md and all interface displays
- Renamed zimaos-client.ts to ozsync-client.ts
- Fixed compilation errors and ensured project builds successfully
- Improved error handling for MediaInfo API
- Set default sync frequency to 15 minutes