refactor(hunt): replace admin middleware with auth and implement membership state

- Change middleware from 'admin' to 'auth' on hunt and quest admin pages
- Add global hunt store to track current hunt ID and membership status
- Use hunt store membership state to conditionally display admin UI elements
- Handle fetch errors gracefully with alerts and back navigation buttons
- Update admin UI logic to depend on membership state instead of user role
- Add membership state update after API calls in hunt, quest, teams, and admin pages
- Refactor UI templates to show error messages when fetch fails
- Centralize membership logic for better authorization control in frontend

app/pages/hunt/[huntSlug]/[questSlug]/index.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { parseError, sluggy } from '#imports';
+import { parseError, sluggy, useHuntStore } from '#imports';
 import { compressImage, createImageURL } from '#shared/utils/image';
 import ClickableImage from '~/components/ClickableImage.vue';
 import MultilineString from '~/components/MultilineString.vue';
@@ -22,6 +22,13 @@ const localePath = useLocalePath();
 const { tKey, hasKey, tSluggy } = useI18nKey();
 
 const titleStore = useTitleStore();
+const huntStore = useHuntStore();
+const isHuntAdmin = computed(
+  () =>
+    huntSlug !== undefined &&
+    huntStore.huntId === huntSlug.id &&
+    huntStore.isMember
+);
 
 const { data, pending, refresh, error } = await useFetch(
   `/api/quest/${questSlug?.id}`
@@ -195,11 +202,11 @@ async function submit() {
         >{{ t('layouts.refresh') }}</VaButton
       >
       <VaButton
-        v-if="user && user.role === 'ADMIN'"
+        v-if="user && isHuntAdmin"
         color="danger"
         :to="
           localePath(
-            `/hunt/${data?.hunt ? tSluggy(data.hunt).value : sluggy(huntSlug!)}/${data ? tSluggy(data).value : sluggy(questSlug!)}}/admin`
+            `/hunt/${data?.hunt ? tSluggy(data.hunt).value : sluggy(huntSlug!)}/${data ? tSluggy(data).value : sluggy(questSlug!)}/admin`
           )
         "
         >{{ t('page.common.admin') }}</VaButton
@@ -268,7 +275,7 @@ async function submit() {
           </VaCardContent>
         </VaCard>
         <VaCard
-          v-if="user && user.role !== 'ADMIN' && data.teamId"
+          v-if="user && !isHuntAdmin && data.teamId"
           stripe
           :stripe-color="data.answer?.final ? 'success' : 'primary'"
         >