heavily simplify server and app content. unify styling

app/plugins/auth.client.js

@@ -1,3 +1,4 @@
+/** Wraps $fetch to redirect to /login on 401 for same-origin requests. */
 export default defineNuxtPlugin(() => {
   const route = useRoute()
   const baseFetch = globalThis.$fetch ?? $fetch
@@ -6,8 +7,7 @@ export default defineNuxtPlugin(() => {
       if (response?.status !== 401) return
       const url = typeof request === 'string' ? request : request?.url ?? ''
       if (!url.startsWith('/')) return
-      const redirect = (route.fullPath && route.fullPath !== '/' ? route.fullPath : '/')
-      navigateTo({ path: '/login', query: { redirect } }, { replace: true })
+      navigateTo({ path: '/login', query: { redirect: route.fullPath || '/' } }, { replace: true })
     },
   })
 })