Implemented cooldown before User is able to resend confirmation code for 2fa

frontend/pweb/lib/pages/2fa/resend.dart

@@ -13,9 +13,15 @@ class ResendCodeButton extends StatelessWidget {
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
     final localizations = AppLocalizations.of(context)!;
+    final provider = context.watch<TwoFactorProvider>();
+    final isDisabled = provider.isCooldownActive || provider.isResending;
+
+    final label = provider.isCooldownActive
+        ? '${localizations.twoFactorResend} (${_formatCooldown(provider.cooldownRemainingSeconds)})'
+        : localizations.twoFactorResend;
 
     return TextButton(
-      onPressed: () => context.read<TwoFactorProvider>().resendCode(),
+      onPressed: isDisabled ? null : () => provider.resendCode(),
       style: TextButton.styleFrom(
         padding: EdgeInsets.zero,
         minimumSize: const Size(0, 0),
@@ -26,7 +32,25 @@ class ResendCodeButton extends StatelessWidget {
           decoration: TextDecoration.underline,
         ),
       ),
-      child: Text(localizations.twoFactorResend),
+      child: provider.isResending
+          ? SizedBox(
+              width: 16,
+              height: 16,
+              child: CircularProgressIndicator(
+                strokeWidth: 2,
+                color: theme.colorScheme.primary,
+              ),
+            )
+          : Text(label),
     );
   }
+
+  String _formatCooldown(int seconds) {
+    final minutes = seconds ~/ 60;
+    final remainingSeconds = seconds % 60;
+    if (minutes > 0) {
+      return '$minutes:${remainingSeconds.toString().padLeft(2, '0')}';
+    }
+    return remainingSeconds.toString();
+  }
 }