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]/teams.vue

@@ -1,9 +1,11 @@
 <script setup lang="ts">
+import { parseError, sluggy } from '#imports';
 import Team from '~/components/admin/Team.vue';
+import { useHuntStore } from '~/stores/hunt';
 import { useTitleStore } from '~/stores/title';
 
 definePageMeta({
-  middleware: ['admin']
+  middleware: ['auth']
 });
 
 const app = useNuxtApp();
@@ -15,8 +17,11 @@ const router = useRouter();
 
 const { name, id } = app.$slugData.huntSlug!;
 const titleStore = useTitleStore();
+const huntStore = useHuntStore();
 
-const { data, refresh } = await useFetch(`/api/admin/hunt/${id}/teams`);
+const { data, refresh, error } = await useFetch(`/api/admin/hunt/${id}/teams`);
+
+huntStore.setMembership(id, !error.value);
 
 useHead({
   title: t('layouts.title', {
@@ -38,17 +43,31 @@ export type Team = Data['teams'][number];
 
 <template>
   <div>
-    <h1>teams</h1>
-    <VaButton color="success" icon="replay" @click="refresh">Refresh</VaButton>
-    <VaAccordion v-if="data" stateful>
-      <Team
-        v-for="team in data.teams"
-        :key="team.id"
-        :team="team"
-        :hunt-id="id"
-        @refresh="refresh"
-      />
-    </VaAccordion>
+    <div v-if="error">
+      <VaAlert color="danger" class="my-4">
+        {{ t(parseError(error)) }}
+      </VaAlert>
+      <VaButton
+        icon="arrow_back"
+        :to="localePath(`/hunt/${sluggy(app.$slugData.huntSlug!)}`)"
+        >{{ t('page.common.back_to_hunt') }}</VaButton
+      >
+    </div>
+    <template v-else>
+      <h1>teams</h1>
+      <VaButton color="success" icon="replay" @click="refresh"
+        >Refresh</VaButton
+      >
+      <VaAccordion v-if="data" stateful>
+        <Team
+          v-for="team in data.teams"
+          :key="team.id"
+          :team="team"
+          :hunt-id="id"
+          @refresh="refresh"
+        />
+      </VaAccordion>
+    </template>
   </div>
 </template>