feat(webapp): redesign dashboard with shadcn-style UI shell

WebApp/src/lib/components/ui/select/select-separator.svelte

@@ -0,0 +1,18 @@
+<script lang="ts">
+	import type { Separator as SeparatorPrimitive } from "bits-ui";
+	import { Separator } from "$lib/components/ui/separator/index.js";
+	import { cn } from "$lib/utils.js";
+
+	let {
+		ref = $bindable(null),
+		class: className,
+		...restProps
+	}: SeparatorPrimitive.RootProps = $props();
+</script>
+
+<Separator
+	bind:ref
+	data-slot="select-separator"
+	class={cn("bg-border -mx-1 my-1 h-px pointer-events-none", className)}
+	{...restProps}
+/>