feat: prefetch lyrics immediately after Odesli conversion

- After Odesli converts Tidal ID to Spotify ID, immediately fetch lyrics
- Lyrics are cached and ready when client requests them
- Happens in background, doesn't block streaming
- Ensures best user experience with instant lyrics availability

allstarr/Services/SquidWTF/SquidWTFDownloadService.cs

@@ -7,6 +7,7 @@ using allstarr.Models.Search;
 using allstarr.Models.Subsonic;
 using allstarr.Services.Local;
 using allstarr.Services.Common;
+using allstarr.Services.Lyrics;
 using Microsoft.Extensions.Options;
 using IOFile = System.IO.File;
 using Microsoft.Extensions.Logging;
@@ -55,6 +56,7 @@ public class SquidWTFDownloadService : BaseDownloadService
     private readonly SquidWTFSettings _squidwtfSettings;
     private readonly OdesliService _odesliService;
     private readonly RoundRobinFallbackHelper _fallbackHelper;
+    private readonly IServiceProvider _serviceProvider;
 
     protected override string ProviderName => "squidwtf";
 
@@ -75,6 +77,7 @@ public class SquidWTFDownloadService : BaseDownloadService
         _squidwtfSettings = SquidWTFSettings.Value;
         _odesliService = odesliService;
         _fallbackHelper = new RoundRobinFallbackHelper(apiUrls, logger, "SquidWTF");
+        _serviceProvider = serviceProvider;
     }
     
 	
@@ -311,6 +314,7 @@ public class SquidWTFDownloadService : BaseDownloadService
     /// <summary>
     /// Converts Tidal track ID to Spotify ID for lyrics support.
     /// Called in background after streaming starts.
+    /// Also prefetches lyrics immediately after conversion.
     /// </summary>
     protected override async Task ConvertToSpotifyIdAsync(string externalProvider, string externalId)
     {
@@ -323,7 +327,35 @@ public class SquidWTFDownloadService : BaseDownloadService
         if (!string.IsNullOrEmpty(spotifyId))
         {
             Logger.LogDebug("Background Spotify ID obtained for Tidal/{TrackId}: {SpotifyId}", externalId, spotifyId);
-            // Spotify ID is cached by Odesli service for future lyrics requests
+            
+            // Immediately prefetch lyrics now that we have the Spotify ID
+            // This ensures lyrics are cached and ready when the client requests them
+            _ = Task.Run(async () =>
+            {
+                try
+                {
+                    using var scope = _serviceProvider.CreateScope();
+                    var spotifyLyricsService = scope.ServiceProvider.GetService<SpotifyLyricsService>();
+                    
+                    if (spotifyLyricsService != null)
+                    {
+                        var lyrics = await spotifyLyricsService.GetLyricsByTrackIdAsync(spotifyId);
+                        if (lyrics != null && lyrics.Lines.Count > 0)
+                        {
+                            Logger.LogDebug("Background lyrics prefetched for Spotify/{SpotifyId}: {LineCount} lines", 
+                                spotifyId, lyrics.Lines.Count);
+                        }
+                        else
+                        {
+                            Logger.LogDebug("No lyrics available for Spotify/{SpotifyId}", spotifyId);
+                        }
+                    }
+                }
+                catch (Exception ex)
+                {
+                    Logger.LogDebug(ex, "Background lyrics prefetch failed for Spotify/{SpotifyId}", spotifyId);
+                }
+            });
         }
     }