fix(payment): allow Stripe payment pages to bypass router auth guard

Stripe payment routes (/payment/stripe, /payment/stripe-popup) are
reached via hard navigation (window.location.href), which caused
the router guard to block access before the page could load.
Set requiresAuth and requiresPayment to false, consistent with
/payment/result. Backend API still enforces authentication.

frontend/src/router/index.ts

@@ -299,11 +299,11 @@ const routes: RouteRecordRaw[] = [
     name: 'StripePayment',
     component: () => import('@/views/user/StripePaymentView.vue'),
     meta: {
-      requiresAuth: true,
+      requiresAuth: false,
       requiresAdmin: false,
       title: 'Stripe Payment',
       titleKey: 'payment.stripePay',
-      requiresPayment: true
+      requiresPayment: false
     }
   },
   {
@@ -311,10 +311,10 @@ const routes: RouteRecordRaw[] = [
     name: 'StripePopup',
     component: () => import('@/views/user/StripePopupView.vue'),
     meta: {
-      requiresAuth: true,
+      requiresAuth: false,
       requiresAdmin: false,
       title: 'Payment',
-      requiresPayment: true
+      requiresPayment: false
     }
   },
   {