✨ Sanitize text to remove hidden unicode and control characters

DysonNetwork.Sphere/Storage/TextSanitizer.cs

@@ -0,0 +1,24 @@
+using System.Globalization;
+using System.Text;
+
+namespace DysonNetwork.Sphere.Storage;
+
+public abstract class TextSanitizer
+{
+    public static string? Sanitize(string? text)
+    {
+        if (string.IsNullOrEmpty(text)) return text;
+
+        var filtered = new StringBuilder();
+        foreach (var ch in from ch in text
+                 let category = CharUnicodeInfo.GetUnicodeCategory(ch)
+                 where category is not (UnicodeCategory.Control or UnicodeCategory.Format
+                     or UnicodeCategory.NonSpacingMark)
+                 select ch)
+        {
+            filtered.Append(ch);
+        }
+        
+        return filtered.ToString(); 
+    }
+}