Add mobile layout

src/lib/components/PageBar.svelte

@@ -0,0 +1,17 @@
+<script lang="ts">
+  import Icon from '@lib/components/Icon.svelte'
+  import Button from '@lib/components/Button.svelte'
+
+  const back = () => history.back()
+</script>
+
+<div class="relative z-feature mx-2 rounded-xl pt-4">
+  <div
+    class="flex min-h-12 items-center justify-between gap-4 rounded-xl bg-base-100 px-4 shadow-xl">
+    <div class="flex items-center gap-4">
+      <slot name="icon" />
+      <slot name="title" />
+    </div>
+    <slot name="action" />
+  </div>
+</div>