0.6.0

Reliability

• Course library (theater data) writes are now atomic with automatic .bak backup and recovery — a crash or corrupt file can no longer wipe your courses
• Progress made in the last seconds before quitting is no longer lost
• Closing a tool dialog or the app now stops ffmpeg jobs instead of leaving them running in the background

Performance

• Opening large folders is dramatically faster: thumbnails now generate only for what's on screen, and re-sorting keeps them instantly
• Course search no longer lags while typing
• Webview course player no longer re-attaches listeners during playback

Fixes

• Videos with #, ?, or % in the filename now play correctly
• webm/mkv/mov now served with the correct content type; smoother seeking edge cases (suffix ranges, out-of-range requests)
• Screenshot count no longer includes files from previous runs

Includes

• Loop mode, volume boost, global shortcuts, course search, music-mini window guard