feat: add warning if passkeys missing

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

@@ -0,0 +1,13 @@
+<script lang="ts">
+	import type { HTMLAttributes } from "svelte/elements";
+	import { cn } from "$lib/utils/style.js";
+
+	type $$Props = HTMLAttributes<HTMLDivElement>;
+
+	let className: $$Props["class"] = undefined;
+	export { className as class };
+</script>
+
+<div class={cn("text-sm [&_p]:leading-relaxed", className)} {...$$restProps}>
+	<slot />
+</div>

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>

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

@@ -0,0 +1,17 @@
+<script lang="ts">
+	import type { HTMLAttributes } from "svelte/elements";
+	import { type Variant, alertVariants } from "./index.js";
+	import { cn } from "$lib/utils/style.js";
+
+	type $$Props = HTMLAttributes<HTMLDivElement> & {
+		variant?: Variant;
+	};
+
+	let className: $$Props["class"] = undefined;
+	export let variant: $$Props["variant"] = "default";
+	export { className as class };
+</script>
+
+<div class={cn(alertVariants({ variant }), className)} {...$$restProps} role="alert">
+	<slot />
+</div>

frontend/src/lib/components/ui/alert/index.ts

@@ -0,0 +1,35 @@
+import { type VariantProps, tv } from 'tailwind-variants';
+
+import Description from './alert-description.svelte';
+import Title from './alert-title.svelte';
+import Root from './alert.svelte';
+
+export const alertVariants = tv({
+	base: '[&>svg]:text-foreground relative w-full rounded-lg border p-4 [&:has(svg)]:pl-11 [&>svg+div]:translate-y-[-3px] [&>svg]:absolute [&>svg]:left-4 [&>svg]:top-4',
+
+	variants: {
+		variant: {
+			default: 'bg-background text-foreground',
+			destructive:
+				'border-destructive/50 text-destructive text-destructive dark:border-destructive [&>svg]:text-destructive',
+			warning:
+				'bg-amber-100 text-amber-900 dark:bg-amber-900 dark:text-amber-100 [&>svg]:text-amber-900 dark:[&>svg]:text-amber-100'
+		}
+	},
+	defaultVariants: {
+		variant: 'default'
+	}
+});
+
+export type Variant = VariantProps<typeof alertVariants>['variant'];
+export type HeadingLevel = 'h1' | 'h2' | 'h3' | 'h4' | 'h5' | 'h6';
+
+export {
+	//
+	Root as Alert,
+	Description as AlertDescription,
+	Title as AlertTitle,
+	Description,
+	Root,
+	Title
+};

frontend/src/routes/settings/account/+page.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+	import * as Alert from '$lib/components/ui/alert';
 	import { Button } from '$lib/components/ui/button';
 	import * as Card from '$lib/components/ui/card';
 	import UserService from '$lib/services/user-service';
@@ -8,6 +9,7 @@
 	import type { UserCreate } from '$lib/types/user.type';
 	import { axiosErrorToast, getWebauthnErrorMessage } from '$lib/utils/error-util';
 	import { startRegistration } from '@simplewebauthn/browser';
+	import { LucideAlertTriangle } from 'lucide-svelte';
 	import { toast } from 'svelte-sonner';
 	import AccountForm from './account-form.svelte';
 	import PasskeyList from './passkey-list.svelte';
@@ -52,6 +54,16 @@
 	<title>Account Settings</title>
 </svelte:head>
 
+{#if passkeys.length == 0}
+	<Alert.Root variant="warning">
+		<LucideAlertTriangle class="size-4" />
+		<Alert.Title>Passkey missing</Alert.Title>
+		<Alert.Description
+			>Please add a passkey to prevent losing access to your account.</Alert.Description
+		>
+	</Alert.Root>
+{/if}
+
 {#if $appConfigStore.allowOwnAccountEdit}
 	<Card.Root>
 		<Card.Header>
@@ -77,7 +89,7 @@
 	</Card.Header>
 	{#if passkeys.length != 0}
 		<Card.Content>
-			<PasskeyList {passkeys} />
+			<PasskeyList bind:passkeys />
 		</Card.Content>
 	{/if}
 </Card.Root>

frontend/src/routes/settings/account/passkey-list.svelte

@@ -9,15 +9,10 @@
 	import { toast } from 'svelte-sonner';
 	import RenamePasskeyModal from './rename-passkey-modal.svelte';
 
-	let { passkeys: initialsPasskeys }: { passkeys: Passkey[] } = $props();
-	let passkeys = $state<Passkey[]>(initialsPasskeys);
+	let { passkeys = $bindable() }: { passkeys: Passkey[] } = $props();
 
 	const webauthnService = new WebauthnService();
 
-	$effect(() => {
-		passkeys = initialsPasskeys;
-	});
-
 	let passkeyToRename: Passkey | null = $state(null);
 
 	async function deletePasskey(passkey: Passkey) {