Feature Request: Auto-sync watched folders to library (folder watching)

[highschooldropout]

Problem / Use Case
I use Syncthing to keep my music library synced across multiple Macs. Currently, I have to manually drag/import new music files into Museeks on each device every time Syncthing syncs new tracks to the folders.

Current workflow:

1. Add music to Device A
2. Syncthing syncs to Device B
3. Manually drag the new folder(s) into Museeks on both devices to import it

This becomes tedious and is easy to forget when frequently adding new music.

Proposed Solution
Add a folder watching feature that allows Museeks to:

• Monitor specified folders for changes (new files, deleted files, modified metadata)
• Automatically import new tracks that appear in watched folders
• Optionally remove tracks from the library when files are deleted (or mark them as unavailable)
• Rescan watched folders on app startup

Implementation ideas:

• Watch folders could be configured alongside the current "Scan directories" feature
• Could be opt-in (not automatic) to avoid performance issues with slow drives
• Use native OS file watching APIs (e.g., FSEvents on macOS, inotify on Linux, ReadDirectoryChangesW on Windows)

Alternative Considerations
If full folder watching is too complex or resource-intensive for the roadmap, a simpler "Auto-rescan folders on startup" option would also help. Another option could be a manual "Rescan Library" button that actually detects new files in already-scanned folders (related to #742).

Environment

• macOS (multiple devices via Syncthing)
• Museeks latest version

[martpie]

do you mean this feature that already exists? ;)

[martpie]

I don't think it removes the tracks that got removed though, that could be an improvement to add.

[highschooldropout]

I honestly don't know what I was thinking. Apparently I saw that all along without every actually reading it, thinking it was a section heading or something. Totally spaced out. Anyway, thanks!

I don't think it removes the tracks that got removed though, that could be an improvement to add.

Yeah - hope you'll consider this!