fix: navigate to 404, the page will be blank

src/client/app/router.ts

@@ -20,13 +20,22 @@ export const RouterSymbol: InjectionKey<Router> = Symbol()
 // matter and is only passed to support same-host hrefs.
 const fakeHost = `http://a.com`
 
+const getDefaultPageData = (): PageData => ({
+  relativePath: '',
+  title: '',
+  description: '',
+  headers: [],
+  frontmatter: {},
+  lastUpdated: 0
+})
+
 const getDefaultRoute = (): Route => ({
   path: '/',
   component: null,
   // this will be set upon initial page load, which is before
   // the app is mounted, so it's guaranteed to be available in
   // components
-  data: null as any
+  data: getDefaultPageData()
 })
 
 interface PageModule {