feat: 404 page emitter

quartz/components/index.ts

@@ -1,7 +1,8 @@
-import ArticleTitle from "./ArticleTitle"
 import Content from "./pages/Content"
 import TagContent from "./pages/TagContent"
 import FolderContent from "./pages/FolderContent"
+import NotFound from "./pages/404"
+import ArticleTitle from "./ArticleTitle"
 import Darkmode from "./Darkmode"
 import Head from "./Head"
 import PageTitle from "./PageTitle"
@@ -36,4 +37,5 @@ export {
   DesktopOnly,
   MobileOnly,
   RecentNotes,
+  NotFound,
 }

quartz/components/pages/404.tsx

@@ -0,0 +1,12 @@
+import { QuartzComponentConstructor } from "../types"
+
+function NotFound() {
+  return (
+    <article class="popover-hint">
+      <h1>404</h1>
+      <p>Either this page is private or doesn't exist.</p>
+    </article>
+  )
+}
+
+export default (() => NotFound) satisfies QuartzComponentConstructor