feat: add local fallback for S3 writes

frontend/src/app/layouts/PublicLayout.vue

@@ -8,6 +8,8 @@ const auth = useAuthStore()
 const router = useRouter()
 
 const isLoggedIn = computed(() => auth.isLoggedIn)
+const consoleRoute = computed(() => (auth.user?.role === 'admin' ? '/admin' : '/dashboard'))
+const consoleLabel = computed(() => (auth.user?.role === 'admin' ? '管理后台' : '控制台'))
 
 function logout() {
   auth.logout()
@@ -35,10 +37,10 @@ function logout() {
         <div class="flex items-center gap-3">
           <template v-if="isLoggedIn">
             <RouterLink
-              to="/dashboard"
+              :to="consoleRoute"
               class="rounded-md border border-slate-200 bg-white px-3 py-1.5 text-sm text-slate-700 hover:bg-slate-50"
             >
-              控制台
+              {{ consoleLabel }}
             </RouterLink>
             <button
               type="button"

frontend/src/app/router.ts

@@ -81,7 +81,7 @@ export function createAppRouter(pinia: Pinia) {
     }
 
     if ((to.name === 'login' || to.name === 'register') && auth.isLoggedIn) {
-      return { name: 'dashboard' }
+      return { name: auth.user?.role === 'admin' ? 'admin' : 'dashboard' }
     }
 
     if (to.meta?.requiresAdmin && auth.user?.role !== 'admin') {