Refactor: standardize namespace and using directive style

Refactored all C# test files to use explicit namespace declarations and moved all using directives inside the namespace block for consistency. Updated assembly info and cache files to reflect the new build. Adjusted MvcTestingAppManifest.json to use fully qualified assembly names. No functional changes; all updates are related to code style, organization, and project metadata.

MediaBrowser.Providers/Plugins/StudioImages/Configuration/PluginConfiguration.cs

@@ -2,10 +2,10 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
-using MediaBrowser.Model.Plugins;
-
 namespace MediaBrowser.Providers.Plugins.StudioImages.Configuration
 {
+    using MediaBrowser.Model.Plugins;
+
     /// <summary>
     /// Plugin configuration class for the studio image provider.
     /// </summary>

MediaBrowser.Providers/Plugins/StudioImages/Plugin.cs

@@ -2,18 +2,18 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
-#nullable disable
-
-using System;
-using System.Collections.Generic;
-using MediaBrowser.Common.Configuration;
-using MediaBrowser.Common.Plugins;
-using MediaBrowser.Model.Plugins;
-using MediaBrowser.Model.Serialization;
-using MediaBrowser.Providers.Plugins.StudioImages.Configuration;
-
 namespace MediaBrowser.Providers.Plugins.StudioImages
 {
+#nullable disable
+
+    using System;
+    using System.Collections.Generic;
+    using MediaBrowser.Common.Configuration;
+    using MediaBrowser.Common.Plugins;
+    using MediaBrowser.Model.Plugins;
+    using MediaBrowser.Model.Serialization;
+    using MediaBrowser.Providers.Plugins.StudioImages.Configuration;
+
     /// <summary>
     /// Artwork Plugin class.
     /// </summary>

MediaBrowser.Providers/Plugins/StudioImages/StudiosImageProvider.cs

@@ -2,27 +2,27 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
-#nullable disable
-
-using System;
-using System.Collections.Generic;
-using System.Globalization;
-using System.IO;
-using System.Linq;
-using System.Net.Http;
-using System.Threading;
-using System.Threading.Tasks;
-using Jellyfin.Extensions;
-using MediaBrowser.Common.Net;
-using MediaBrowser.Controller.Configuration;
-using MediaBrowser.Controller.Entities;
-using MediaBrowser.Controller.Providers;
-using MediaBrowser.Model.Entities;
-using MediaBrowser.Model.IO;
-using MediaBrowser.Model.Providers;
-
 namespace MediaBrowser.Providers.Plugins.StudioImages
 {
+#nullable disable
+
+    using System;
+    using System.Collections.Generic;
+    using System.Globalization;
+    using System.IO;
+    using System.Linq;
+    using System.Net.Http;
+    using System.Threading;
+    using System.Threading.Tasks;
+    using Jellyfin.Extensions;
+    using MediaBrowser.Common.Net;
+    using MediaBrowser.Controller.Configuration;
+    using MediaBrowser.Controller.Entities;
+    using MediaBrowser.Controller.Providers;
+    using MediaBrowser.Model.Entities;
+    using MediaBrowser.Model.IO;
+    using MediaBrowser.Model.Providers;
+
     /// <summary>
     /// Studio image provider.
     /// </summary>