fix for resend, cooldown and a few small fixes

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;