Add more unicode functions

modules/ANSUtilities/ANSUtilities.cpp

@@ -1122,6 +1122,16 @@ namespace ANSCENTER
 
     std::string ANSUtilities::UnescapeDoubleEscapedUnicode(const std::string& str) {
         if (str.empty()) return "";
+        // Quick scan: if no \\u pattern exists, return original string unchanged
+        bool found = false;
+        for (size_t i = 0; i + 2 < str.size(); i++) {
+            if (str[i] == '\\' && str[i + 1] == '\\' && str[i + 2] == 'u') {
+                found = true;
+                break;
+            }
+        }
+        if (!found) return str;
+
         std::string result;
         result.reserve(str.size());
         for (size_t i = 0; i < str.size(); i++) {