Moved all extension methods into extension blocks (#1155)

app/MindWork AI Studio/Chat/StringExtension.cs

@@ -2,37 +2,40 @@
 
 public static class StringExtensions
 {
-    public static string RemoveThinkTags(this string input)
-    {
-        const string OPEN_TAG = "<think>";
-        const string CLOSE_TAG = "</think>";
-        if (string.IsNullOrWhiteSpace(input) || !input.StartsWith(OPEN_TAG, StringComparison.Ordinal))
-            return input;
-        
-        var endIndex = input.IndexOf(CLOSE_TAG, StringComparison.Ordinal);
-        if (endIndex == -1)
-            return string.Empty;
-        
-        return input[(endIndex + CLOSE_TAG.Length)..];
-    }
-
-    /// <summary>
-    /// Shortens a text to the given number of characters, and marks the cut with three dots.
-    /// </summary>
-    /// <remarks>
-    /// Never cuts between the two halves of a surrogate pair, which no JSON writer takes.<br/><br/>
-    /// Takes and returns a string rather than a span on purpose: most texts are short enough, and
-    /// those come back as the very same instance. Only a text which is cut costs one new string.
-    /// </remarks>
     /// <param name="text">The text.</param>
-    /// <param name="maxCharacters">How many characters of the text to keep at most, the dots not counted.</param>
-    /// <returns>The text as it was when it is short enough, otherwise its beginning followed by three dots.</returns>
-    public static string Shorten(this string text, int maxCharacters)
+    extension(string text)
     {
-        if (text.Length <= maxCharacters)
-            return text;
+        public string RemoveThinkTags()
+        {
+            const string OPEN_TAG = "<think>";
+            const string CLOSE_TAG = "</think>";
+            if (string.IsNullOrWhiteSpace(text) || !text.StartsWith(OPEN_TAG, StringComparison.Ordinal))
+                return text;
+        
+            var endIndex = text.IndexOf(CLOSE_TAG, StringComparison.Ordinal);
+            if (endIndex == -1)
+                return string.Empty;
+        
+            return text[(endIndex + CLOSE_TAG.Length)..];
+        }
 
-        var end = char.IsHighSurrogate(text[maxCharacters - 1]) ? maxCharacters - 1 : maxCharacters;
-        return string.Concat(text.AsSpan(0, end).TrimEnd(), "...");
+        /// <summary>
+        /// Shortens a text to the given number of characters, and marks the cut with three dots.
+        /// </summary>
+        /// <remarks>
+        /// Never cuts between the two halves of a surrogate pair, which no JSON writer takes.<br/><br/>
+        /// Takes and returns a string rather than a span on purpose: most texts are short enough, and
+        /// those come back as the very same instance. Only a text which is cut costs one new string.
+        /// </remarks>
+        /// <param name="maxCharacters">How many characters of the text to keep at most, the dots not counted.</param>
+        /// <returns>The text as it was when it is short enough, otherwise its beginning followed by three dots.</returns>
+        public string Shorten(int maxCharacters)
+        {
+            if (text.Length <= maxCharacters)
+                return text;
+
+            var end = char.IsHighSurrogate(text[maxCharacters - 1]) ? maxCharacters - 1 : maxCharacters;
+            return string.Concat(text.AsSpan(0, end).TrimEnd(), "...");
+        }
     }
 }