SvelteKit-based WebUI (#14839)

tools/server/webui/src/routes/+error.svelte

@@ -0,0 +1,70 @@
+<script lang="ts">
+	import { page } from '$app/stores';
+	import { goto } from '$app/navigation';
+	import { ServerErrorSplash } from '$lib/components/app';
+
+	let error = $derived($page.error);
+	let status = $derived($page.status);
+
+	// Check if this is an API key related error
+	let isApiKeyError = $derived(
+		status === 401 ||
+			status === 403 ||
+			error?.message?.toLowerCase().includes('access denied') ||
+			error?.message?.toLowerCase().includes('unauthorized') ||
+			error?.message?.toLowerCase().includes('invalid api key')
+	);
+
+	function handleRetry() {
+		// Navigate back to home page after successful API key validation
+		goto('/');
+	}
+</script>
+
+<svelte:head>
+	<title>Error {status} - WebUI</title>
+</svelte:head>
+
+{#if isApiKeyError}
+	<ServerErrorSplash
+		error={error?.message || 'Access denied - check server permissions'}
+		onRetry={handleRetry}
+		showRetry={false}
+		showTroubleshooting={false}
+	/>
+{:else}
+	<!-- Generic error page for non-API key errors -->
+	<div class="flex h-full items-center justify-center">
+		<div class="w-full max-w-md px-4 text-center">
+			<div class="mb-6">
+				<div
+					class="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-full bg-destructive/10"
+				>
+					<svg
+						class="h-8 w-8 text-destructive"
+						fill="none"
+						stroke="currentColor"
+						viewBox="0 0 24 24"
+					>
+						<path
+							stroke-linecap="round"
+							stroke-linejoin="round"
+							stroke-width="2"
+							d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-2.5L13.732 4c-.77-.833-1.964-.833-2.732 0L3.732 16.5c-.77.833.192 2.5 1.732 2.5z"
+						/>
+					</svg>
+				</div>
+				<h1 class="mb-2 text-2xl font-bold">Error {status}</h1>
+				<p class="text-muted-foreground">
+					{error?.message || 'Something went wrong'}
+				</p>
+			</div>
+			<button
+				onclick={() => goto('/')}
+				class="rounded-md bg-primary px-4 py-2 text-primary-foreground hover:bg-primary/90"
+			>
+				Go Home
+			</button>
+		</div>
+	</div>
+{/if}