fix: Add 404 page with meta to fix route flicker

src/pages/[...all].vue

@@ -1,4 +1,11 @@
 <script setup lang="ts">
+definePage({
+  name: '404',
+  meta: {
+    level: 2,
+  },
+})
+
 const router = useRouter()
 
 function onBack() {

src/typed-router.d.ts

@@ -19,7 +19,7 @@ declare module 'vue-router/auto-routes' {
    */
   export interface RouteNamedMap {
     'home': RouteRecordInfo<'home', '/', Record<never, never>, Record<never, never>>,
-    '/[...all]': RouteRecordInfo<'/[...all]', '/:all(.*)', { all: ParamValue<true> }, { all: ParamValue<false> }>,
+    '404': RouteRecordInfo<'404', '/:all(.*)', { all: ParamValue<true> }, { all: ParamValue<false> }>,
     'charts': RouteRecordInfo<'charts', '/charts', Record<never, never>, Record<never, never>>,
     'counter': RouteRecordInfo<'counter', '/counter', Record<never, never>, Record<never, never>>,
     'KeepAlive': RouteRecordInfo<'KeepAlive', '/keepalive', Record<never, never>, Record<never, never>>,