feat: add warning if passkeys missing

frontend/src/lib/components/ui/alert/alert-title.svelte

@@ -0,0 +1,21 @@
+<script lang="ts">
+	import type { HTMLAttributes } from "svelte/elements";
+	import type { HeadingLevel } from "./index.js";
+	import { cn } from "$lib/utils/style.js";
+
+	type $$Props = HTMLAttributes<HTMLHeadingElement> & {
+		level?: HeadingLevel;
+	};
+
+	let className: $$Props["class"] = undefined;
+	export let level: $$Props["level"] = "h5";
+	export { className as class };
+</script>
+
+<svelte:element
+	this={level}
+	class={cn("mb-1 font-medium leading-none tracking-tight", className)}
+	{...$$restProps}
+>
+	<slot />
+</svelte:element>