Wizard improvements: version info, 64-bit label, paste fix

- Version cards show technical info (Version 16.0 · LTSC · OS support)
- 64-bit option labeled as "(ajánlott)"
- Full product key paste distributes across all 5 input fields

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Pages/ProductKeyPage.xaml.cs

@@ -34,9 +34,33 @@ namespace InstaSoftOfficeTool.Pages
             if (_suppressAutoTab) return;
 
             var tb = (TextBox)sender;
+            var raw = tb.Text;
 
-            var cleaned = Regex.Replace(tb.Text, "[^A-Za-z0-9]", "");
-            if (cleaned != tb.Text)
+            // Detect full key paste (contains dash or longer than 5 chars with alphanumerics)
+            var allAlphaNum = Regex.Replace(raw, "[^A-Za-z0-9]", "");
+            if (allAlphaNum.Length > 5 && tb == _keyBoxes[0])
+            {
+                // Full key pasted — distribute across all boxes
+                _suppressAutoTab = true;
+                for (int i = 0; i < 5; i++)
+                {
+                    int start = i * 5;
+                    if (start < allAlphaNum.Length)
+                    {
+                        int len = System.Math.Min(5, allAlphaNum.Length - start);
+                        _keyBoxes[i].Text = allAlphaNum.Substring(start, len).ToUpper();
+                    }
+                }
+                _suppressAutoTab = false;
+                _keyBoxes[4].Focus();
+                _keyBoxes[4].CaretIndex = _keyBoxes[4].Text.Length;
+                ValidationMessage.Visibility = Visibility.Collapsed;
+                return;
+            }
+
+            // Clean non-alphanumeric chars
+            var cleaned = Regex.Replace(raw, "[^A-Za-z0-9]", "");
+            if (cleaned != raw)
             {
                 _suppressAutoTab = true;
                 tb.Text = cleaned;
@@ -44,6 +68,7 @@ namespace InstaSoftOfficeTool.Pages
                 _suppressAutoTab = false;
             }
 
+            // Auto-tab to next box when 5 chars entered
             if (tb.Text.Length == 5)
             {
                 for (int i = 0; i < _keyBoxes.Length - 1; i++)