fix for resend, cooldown and a few small fixes

frontend/pweb/lib/utils/cooldown_format.dart

@@ -0,0 +1,8 @@
+String formatCooldownSeconds(int seconds) {
+  final minutes = seconds ~/ 60;
+  final remainingSeconds = seconds % 60;
+  if (minutes > 0) {
+    return '$minutes:${remainingSeconds.toString().padLeft(2, '0')}';
+  }
+  return remainingSeconds.toString();
+}

frontend/pweb/lib/utils/error/handler.dart

@@ -15,6 +15,7 @@ class ErrorHandler {
       'account_not_verified': locs.errorAccountNotVerified,
       'unauthorized': locs.errorLoginUnauthorized,
       'verification_token_not_found': locs.errorVerificationTokenNotFound,
+      'user_already_registered': locs.errorDuplicateEmail,
       'internal_error': locs.errorInternalError,
       'invalid_target': locs.errorInvalidTarget,
       'pending_token_required': locs.errorPendingTokenRequired,
@@ -62,6 +63,9 @@ class ErrorHandler {
   }
 
   static String _handleErrorResponseLocs(AppLocalizations locs, ErrorResponse e) {
+    if (e.source == 'user_already_registered') {
+      return locs.errorDuplicateEmail;
+    }
     final errorMessages = getErrorMessagesLocs(locs);
     // Return the localized message if we recognize the error key, else use the raw details
     return errorMessages[e.error] ?? e.details;