feat: add GlitchTip test page and PUBLIC_UMAMI_SCRIPT_URL to ui env

ui/src/routes/+layout.svelte

@@ -171,10 +171,10 @@
 	<meta name="viewport" content="width=device-width, initial-scale=1" />
 	<title>libnovel</title>
 	<!-- Umami analytics — no-op when PUBLIC_UMAMI_WEBSITE_ID is unset -->
-	{#if env.PUBLIC_UMAMI_WEBSITE_ID}
+	{#if env.PUBLIC_UMAMI_WEBSITE_ID && env.PUBLIC_UMAMI_SCRIPT_URL}
 		<script
 			defer
-			src="https://analytics.libnovel.cc/script.js"
+			src={env.PUBLIC_UMAMI_SCRIPT_URL}
 			data-website-id={env.PUBLIC_UMAMI_WEBSITE_ID}
 		></script>
 	{/if}

ui/src/routes/glitchtip-test/+page.server.ts

@@ -0,0 +1,10 @@
+import type { PageServerLoad } from './$types';
+
+export const load: PageServerLoad = async ({ url }) => {
+	if (url.searchParams.get('server_error') === '1') {
+		// This unhandled throw is caught by handleError in hooks.server.ts,
+		// which forwards it to GlitchTip via Sentry.captureException.
+		throw new Error('GlitchTip server-side test error — ' + new Date().toISOString());
+	}
+	return {};
+};

ui/src/routes/glitchtip-test/+page.svelte

@@ -0,0 +1,48 @@
+<script lang="ts">
+	import * as Sentry from '@sentry/sveltekit';
+	import { Button } from '$lib/components/ui/button';
+
+	function throwClientError() {
+		throw new Error('GlitchTip client-side test error — ' + new Date().toISOString());
+	}
+
+	function captureManual() {
+		Sentry.captureException(
+			new Error('GlitchTip manual capture test — ' + new Date().toISOString())
+		);
+		alert('Manually captured exception sent to GlitchTip.');
+	}
+</script>
+
+<div class="max-w-lg mx-auto py-16 flex flex-col gap-6">
+	<h1 class="text-2xl font-bold text-zinc-100">GlitchTip Test Page</h1>
+	<p class="text-zinc-400 text-sm">
+		Use the buttons below to fire test errors. Check
+		<a
+			href="https://errors.libnovel.cc"
+			target="_blank"
+			rel="noopener noreferrer"
+			class="text-amber-400 hover:text-amber-300 underline">errors.libnovel.cc</a
+		> to confirm they arrive.
+	</p>
+
+	<div class="flex flex-col gap-3">
+		<!-- Triggers an unhandled JS exception → caught by handleError in hooks.client.ts -->
+		<Button variant="destructive" onclick={throwClientError}>
+			Throw unhandled client-side error
+		</Button>
+
+		<!-- Sends an exception directly via Sentry.captureException -->
+		<Button variant="outline" onclick={captureManual}>
+			Manually capture exception (Sentry.captureException)
+		</Button>
+
+		<!-- SSR load error — visit this URL to trigger a server-side throw -->
+		<a
+			href="/glitchtip-test?server_error=1"
+			class="text-sm text-zinc-400 hover:text-amber-400 underline text-center"
+		>
+			Trigger server-side load error (navigate here with ?server_error=1)
+		</a>
+	</div>
+</div>