chore: migrate AdminShuttles and old API endpoints from Axios/Render to Supabase client, remove Axios

frontend/src/views/CouponsView.vue

@@ -2,11 +2,9 @@
 import { onMounted, ref, computed } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { useCouponStore } from '@/stores/coupon'
-import { SUPABASE_URL } from '@/supabase'
 import type { Coupon } from '@/types'
 import FavoriteButton from '@/components/FavoriteButton.vue'
-
-const API_URL = import.meta.env.VITE_API_URL || 'http://localhost:8000';
+import { getImageUrl as utilGetImageUrl } from '@/utils/imageUrl'
 
 const { t } = useI18n()
 const couponStore = useCouponStore()
@@ -33,9 +31,7 @@ const filteredCoupons = computed(() => {
 })
 
 function getImageUrl(path: string | null | undefined) {
-  if (!path) return '/default-coupon.png'
-  if (path.startsWith('http')) return path
-  return `${API_URL}${path.startsWith('/') ? '' : '/'}${path}`
+  return utilGetImageUrl(path, 'coupon')
 }