refactor: pass decoded SquidWTF URL from Program.cs to services

- Decode base64 URL once at startup in Program.cs
- Pass decoded URL as constructor parameter to all SquidWTF services
- Services receive plain URL, no decoding logic in service classes
- Cleaner separation: encoding/decoding only in Program.cs
- All service code remains unchanged, just receives decoded URL

allstarr/Program.cs

@@ -12,9 +12,19 @@ using allstarr.Services.Lyrics;
 using allstarr.Middleware;
 using allstarr.Filters;
 using Microsoft.Extensions.Http;
+using System.Text;
 
 var builder = WebApplication.CreateBuilder(args);
 
+// Decode SquidWTF API base URL once at startup
+var squidWtfApiBase = DecodeSquidWtfUrl();
+static string DecodeSquidWtfUrl()
+{
+    var encoded = "aHR0cHM6Ly90cml0b24uc3F1aWQud3Rm";
+    var bytes = Convert.FromBase64String(encoded);
+    return Encoding.UTF8.GetString(bytes);
+}
+
 // Determine backend type FIRST
 var backendType = builder.Configuration.GetValue<BackendType>("Backend:Type");
 
@@ -163,9 +173,26 @@ else if (musicService == MusicService.Deezer)
 }
 else if (musicService == MusicService.SquidWTF)
 {
-    // SquidWTF services
-    builder.Services.AddSingleton<IMusicMetadataService, SquidWTFMetadataService>();
-    builder.Services.AddSingleton<IDownloadService, SquidWTFDownloadService>();
+    // SquidWTF services - pass decoded URL
+    builder.Services.AddSingleton<IMusicMetadataService>(sp => 
+        new SquidWTFMetadataService(
+            sp.GetRequiredService<IHttpClientFactory>(),
+            sp.GetRequiredService<Microsoft.Extensions.Options.IOptions<SubsonicSettings>>(),
+            sp.GetRequiredService<Microsoft.Extensions.Options.IOptions<SquidWTFSettings>>(),
+            sp.GetRequiredService<ILogger<SquidWTFMetadataService>>(),
+            sp.GetRequiredService<RedisCacheService>(),
+            squidWtfApiBase));
+    builder.Services.AddSingleton<IDownloadService>(sp =>
+        new SquidWTFDownloadService(
+            sp.GetRequiredService<IHttpClientFactory>(),
+            sp.GetRequiredService<IConfiguration>(),
+            sp.GetRequiredService<ILocalLibraryService>(),
+            sp.GetRequiredService<IMusicMetadataService>(),
+            sp.GetRequiredService<Microsoft.Extensions.Options.IOptions<SubsonicSettings>>(),
+            sp.GetRequiredService<Microsoft.Extensions.Options.IOptions<SquidWTFSettings>>(),
+            sp,
+            sp.GetRequiredService<ILogger<SquidWTFDownloadService>>(),
+            squidWtfApiBase));
 }
 
 // Startup validation - register validators based on backend
@@ -180,7 +207,11 @@ else
 
 builder.Services.AddSingleton<IStartupValidator, DeezerStartupValidator>();
 builder.Services.AddSingleton<IStartupValidator, QobuzStartupValidator>();
-builder.Services.AddSingleton<IStartupValidator, SquidWTFStartupValidator>();
+builder.Services.AddSingleton<IStartupValidator>(sp =>
+    new SquidWTFStartupValidator(
+        sp.GetRequiredService<Microsoft.Extensions.Options.IOptions<SquidWTFSettings>>(),
+        sp.GetRequiredService<IHttpClientFactory>().CreateClient(),
+        squidWtfApiBase));
 
 // Register orchestrator as hosted service
 builder.Services.AddHostedService<StartupValidationOrchestrator>();

allstarr/Services/SquidWTF/SquidWTFDownloadService.cs

@@ -26,14 +26,7 @@ public class SquidWTFDownloadService : BaseDownloadService
     private DateTime _lastRequestTime = DateTime.MinValue;
     private readonly int _minRequestIntervalMs = 200;
     
-	private static readonly string SquidWTFApiBase = DecodeBaseUrl();
-	
-	private static string DecodeBaseUrl()
-	{
-		var encoded = "aHR0cHM6Ly90cml0b24uc3F1aWQud3Rm";
-		var bytes = Convert.FromBase64String(encoded);
-		return Encoding.UTF8.GetString(bytes);
-	}
+	private readonly string SquidWTFApiBase;
 
     protected override string ProviderName => "squidwtf";
 
@@ -45,11 +38,13 @@ public class SquidWTFDownloadService : BaseDownloadService
         IOptions<SubsonicSettings> subsonicSettings,
         IOptions<SquidWTFSettings> SquidWTFSettings,
 		IServiceProvider serviceProvider,
-        ILogger<SquidWTFDownloadService> logger)
+        ILogger<SquidWTFDownloadService> logger,
+        string apiBase)
         : base(configuration, localLibraryService, metadataService, subsonicSettings.Value, serviceProvider, logger)
     {
         _httpClient = httpClientFactory.CreateClient();
         _squidwtfSettings = SquidWTFSettings.Value;
+        SquidWTFApiBase = apiBase;
     }
 	
     #region BaseDownloadService Implementation

allstarr/Services/SquidWTF/SquidWTFMetadataService.cs

@@ -21,27 +21,21 @@ public class SquidWTFMetadataService : IMusicMetadataService
     private readonly SubsonicSettings _settings;
     private readonly ILogger<SquidWTFMetadataService> _logger;
     private readonly RedisCacheService _cache;
-	
-	private static readonly string BaseUrl = DecodeBaseUrl();
-	
-	private static string DecodeBaseUrl()
-	{
-		var encoded = "aHR0cHM6Ly90cml0b24uc3F1aWQud3Rm";
-		var bytes = Convert.FromBase64String(encoded);
-		return Encoding.UTF8.GetString(bytes);
-	}
+	private readonly string BaseUrl;
 
     public SquidWTFMetadataService(
         IHttpClientFactory httpClientFactory, 
         IOptions<SubsonicSettings> settings,
         IOptions<SquidWTFSettings> squidwtfSettings,
         ILogger<SquidWTFMetadataService> logger,
-        RedisCacheService cache)
+        RedisCacheService cache,
+        string baseUrl)
     {
         _httpClient = httpClientFactory.CreateClient();
         _settings = settings.Value;
         _logger = logger;
         _cache = cache;
+        BaseUrl = baseUrl;
         
         // Set up default headers
         _httpClient.DefaultRequestHeaders.Add("User-Agent", 

allstarr/Services/SquidWTF/SquidWTFStartupValidator.cs

@@ -12,22 +12,15 @@ namespace allstarr.Services.SquidWTF;
 public class SquidWTFStartupValidator : BaseStartupValidator
 {
     private readonly SquidWTFSettings _settings;
-	
-	private static readonly string _apiBase = DecodeBaseUrl();
-	
-	private static string DecodeBaseUrl()
-	{
-		var encoded = "aHR0cHM6Ly90cml0b24uc3F1aWQud3Rm";
-		var bytes = Convert.FromBase64String(encoded);
-		return Encoding.UTF8.GetString(bytes);
-	}
+	private readonly string _apiBase;
 
     public override string ServiceName => "SquidWTF";
 
-    public SquidWTFStartupValidator(IOptions<SquidWTFSettings> settings, HttpClient httpClient)
+    public SquidWTFStartupValidator(IOptions<SquidWTFSettings> settings, HttpClient httpClient, string apiBase)
         : base(httpClient)
     {
         _settings = settings.Value;
+        _apiBase = apiBase;
     }	
 	
     public override async Task<ValidationResult> ValidateAsync(CancellationToken cancellationToken)