Redirect URIs for Spotify and Tidal OAuth are now configurable via the web UI and settings. Updated backend clients to use the configured redirect URI if provided, improving flexibility for deployments with custom callback URLs.
Introduces web server routes and UI buttons for initiating Spotify and Tidal OAuth authentication flows, with dedicated callback servers for token exchange. Updates Docker ports for OAuth callbacks and refines PKCE handling for Tidal. Improves user experience by allowing authentication directly from the web UI.
