Moved all extension methods into extension blocks (#1155)

app/MindWork AI Studio/Assistants/ERI/ERIServerFileOutcomeExtensions.cs

@@ -11,13 +11,16 @@ internal static class ERIServerFileOutcomeExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(ERIServerFileOutcomeExtensions).Namespace, nameof(ERIServerFileOutcomeExtensions));
 
-    /// <summary>
-    /// Gets the localized message which explains why a file was not written.
-    /// </summary>
     /// <param name="outcome">What became of the file.</param>
-    /// <param name="file">The path of the file, as the model named it.</param>
-    /// <returns>The localized message.</returns>
-    internal static string ToUserMessage(this ERIServerFileOutcome outcome, string file) => string.Format(ToUserMessageFormat(outcome), file);
+    extension(ERIServerFileOutcome outcome)
+    {
+        /// <summary>
+        /// Gets the localized message which explains why a file was not written.
+        /// </summary>
+        /// <param name="file">The path of the file, as the model named it.</param>
+        /// <returns>The localized message.</returns>
+        internal string ToUserMessage(string file) => string.Format(ToUserMessageFormat(outcome), file);
+    }
 
     private static string ToUserMessageFormat(ERIServerFileOutcome outcome) => outcome switch
     {