Tweak layout css

src/lib/components/PageContent.svelte

@@ -0,0 +1,18 @@
+<script lang="ts">
+  import type {Snippet} from "svelte"
+
+  interface Props {
+    element?: Element
+    children?: Snippet
+    [key: string]: any
+  }
+
+  let {children, element = $bindable(), ...props}: Props = $props()
+</script>
+
+<div
+  {...props}
+  bind:this={element}
+  class="scroll-container saib cw fixed top-12 h-[calc(100%-6.5rem)] overflow-y-auto overflow-x-hidden md:h-[calc(100%-3rem)] {props.class}">
+  {@render children?.()}
+</div>