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.Controller/IO/FileData.cs

@@ -2,15 +2,15 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
-using MediaBrowser.Controller.Library;
-using MediaBrowser.Controller.Providers;
-using MediaBrowser.Model.IO;
-using Microsoft.Extensions.Logging;
-
 namespace MediaBrowser.Controller.IO
 {
+    using System;
+    using System.Collections.Generic;
+    using MediaBrowser.Controller.Library;
+    using MediaBrowser.Controller.Providers;
+    using MediaBrowser.Model.IO;
+    using Microsoft.Extensions.Logging;
+
     /// <summary>
     /// Provides low level File access that is much faster than the File/Directory api's.
     /// </summary>

MediaBrowser.Controller/IO/FileSystemHelper.cs

@@ -2,6 +2,8 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
+namespace MediaBrowser.Controller.IO;
+
 using System;
 using System.Collections.Generic;
 using System.IO;
@@ -9,8 +11,6 @@ using System.Linq;
 using MediaBrowser.Model.IO;
 using Microsoft.Extensions.Logging;
 
-namespace MediaBrowser.Controller.IO;
-
 /// <summary>
 /// Helper methods for file system management.
 /// </summary>

MediaBrowser.Controller/IO/IExternalDataManager.cs

@@ -2,12 +2,12 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
+namespace MediaBrowser.Controller.IO;
+
 using System.Threading;
 using System.Threading.Tasks;
 using MediaBrowser.Controller.Entities;
 
-namespace MediaBrowser.Controller.IO;
-
 /// <summary>
 /// Interface IPathManager.
 /// </summary>

MediaBrowser.Controller/IO/IPathManager.cs

@@ -2,11 +2,11 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
+namespace MediaBrowser.Controller.IO;
+
 using System.Collections.Generic;
 using MediaBrowser.Controller.Entities;
 
-namespace MediaBrowser.Controller.IO;
-
 /// <summary>
 /// Interface IPathManager.
 /// </summary>