* feat(download): add log capture and file actions
* fix(ci): update ffmpeg download source
* fix(ci): consolidate ffmpeg download source to yt-dlp repository
Update FFmpeg download URLs to use yt-dlp/FFmpeg-Builds as the primary source across all platforms and remove BtbN fallback repository reference.
* feat(ffmpeg): add ffmpeg manager, bundle/download ffmpeg in CI and
* fix(download-engine): let yt-dlp merge format to avoid codec conflicts and use actual format for filenames
* chore(ci): replace monolithic job with platform-specific reusable jobs
* chore(ci): run build matrix for windows, macos, linux in one to
* feat(ci): remove platform matrix and platform gating to simplify build
* chore(ci): pin github-translate-action to specific commit to ensure
