feat(sidebar): group playlists with "/" into collapsible folders

[shawnsquire]

Summary

Adds an optional, front-end-only, cosmetic grouping for sidebar playlists. Playlists whose name contains a forward slash (e.g., Style/Phonk House, Atmospheric/Relaxation) are grouped into collapsible folder rows by the slash-delimited prefix. The folders can be collapsed to hide playlists of some folders, and expanded to show the playlists in that folder (which display without the prefix). Folders without a / will render at the root as they do today.

I believe this aligns with roadmap item "Client-side playlist folders". I wanted this feature because I have very different use cases for different playlists, and usually want to only focus on a small subset of them when I'm looking for music. Since there is no support for playlists in Subsonic API, I decided a front-end modification was the simplest path to get this.

Enable or disable via Settings -> General -> Sidebar -> Enable folders.

Scope

• No API or store changes beyond the new boolean setting
• Only the first-level grouping name is considered (multi-level is out of scope)
• The dedicated /playlists page is unchanged; sidebar only effect

Screenshots

Before

After

Details

• Added a new setting to enable / disable this feature
• No changes occur if the user does not feature / in their playlists
• Updating playlists names to have slash-delimiters will display the folders
• Added a toggle to "expand all" and "collapse all" if there are folders present
• Playlists will continue to appear in alphabetical order (e.g., root-level playlists may display between folders)
• Modified sidebar-playlist-list to export PlaylistRowButton so it can render a <PlaylistFolderTree>
• English language added

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Project	Deployment	Actions	Updated (UTC)
feishin	Ready	Preview, Comment	May 8, 2026 6:12am