Improve numeric input handling for all locales (including Persian and Arabic) (#2240)

* Improve numeric input support in JS: accept all Unicode digits using `\p{Nd}`

Replaced hardcoded digit ranges with Unicode-based digit detection using `\p{Nd}‍` to ensure support for Persian, Arabic, and other locale-specific numerals.

* fix: support all Unicode digit inputs in RadzenNumeric

Replaced digit handling logic with Unicode-aware checks using `char.IsDigit` to support numeric input from any language, including Persian and Arabic.

Previously, non-ASCII digits were blocked, which caused issues for users entering Persian or Arabic numerals. This fix makes the component input-agnostic to digit origin.

Author: mohammad-mohammadi-dev

Radzen.Blazor/RadzenNumeric.razor.cs

@@ -346,11 +346,9 @@ async Task SetValue(string value)
 
         private string RemoveNonNumericCharacters(object value)
         {
-            string valueStr = value as string;
-            if (valueStr == null)
-            {
-                valueStr = $"{value}";
-            }
+            string valueStr = value as string ?? $"{value}";
+
+            valueStr = NormalizeDigits(valueStr);
 
             if (!string.IsNullOrEmpty(Format))
             {
@@ -372,6 +370,28 @@ private string RemoveNonNumericCharacters(object value)
             return new string(valueStr.Where(c => char.IsDigit(c) || char.IsPunctuation(c)).ToArray()).Replace("%", "");
         }
 
+        private static string NormalizeDigits(string input)
+        {
+            if (string.IsNullOrEmpty(input)) return input;
+
+            var sb = new System.Text.StringBuilder(input.Length);
+            foreach (var ch in input)
+            {
+                if (char.GetUnicodeCategory(ch) == System.Globalization.UnicodeCategory.DecimalDigitNumber)
+                {
+                    var numeric = (int)char.GetNumericValue(ch); // 0..9
+                    if (numeric >= 0 && numeric <= 9)
+                    {
+                        sb.Append((char)('0' + numeric));
+                        continue;
+                    }
+                }
+                sb.Append(ch);
+            }
+            return sb.ToString();
+        }
+
+
         /// <summary>
         /// Gets or sets the function which returns TValue from string.
         /// </summary>

Radzen.Blazor/wwwroot/Radzen.Blazor.js

@@ -980,9 +980,9 @@ window.Radzen = {
           return;
     }
 
-    var ch = String.fromCharCode(e.charCode);
+    var ch = e.key;
 
-    if ((isInteger ? /^[-\d]$/ : /^[-\d,.]$/).test(ch)) {
+    if (/\p{Nd}/u.test(ch) || ch === '-' || (!isInteger && ch === decimalSeparator)) {
       return;
     }