feat: analytics frontend dashboard

- Add Dashboard with summary stats, model/user tables
- Add ChartLine component with multi-model support
- Interactive hover tooltips and model breakdown
- Hourly granularity for 24h, daily for 7d+

src/routes/(app)/admin/+layout.svelte

@@ -66,12 +66,12 @@
 							href="/admin">{$i18n.t('Users')}</a
 						>
 
-						<!-- <a
+						<a
 							class="min-w-fit p-1.5 {$page.url.pathname.includes('/admin/analytics')
 								? ''
 								: 'text-gray-300 dark:text-gray-600 hover:text-gray-700 dark:hover:text-white'} transition"
 							href="/admin/analytics">{$i18n.t('Analytics')}</a
-						> -->
+						>
 
 						<a
 							class="min-w-fit p-1.5 {$page.url.pathname.includes('/admin/evaluations')

src/routes/(app)/admin/analytics/+page.svelte

@@ -1,12 +1,5 @@
 <script>
-	import { goto } from '$app/navigation';
-	import { onMount } from 'svelte';
-
-	import Evaluations from '$lib/components/admin/Evaluations.svelte';
-
-	onMount(() => {
-		goto('/admin/evaluations/leaderboard');
-	});
+	import Analytics from '$lib/components/admin/Analytics.svelte';
 </script>
 
-<Evaluations />
+<Analytics />

src/routes/(app)/admin/analytics/[tab]/+page.svelte

@@ -1,5 +1,5 @@
 <script>
-	import Evaluations from '$lib/components/admin/Evaluations.svelte';
+	import Analytics from '$lib/components/admin/Analytics.svelte';
 </script>
 
-<Evaluations />
+<Analytics />