feat: add Meta title tags to all admin pages

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/frontend/src/routes/admin/articles/+page.svelte

@@ -12,6 +12,7 @@
   import * as Dialog from "$lib/components/ui/dialog";
   import type { Article } from "$lib/types";
   import TimeAgo from "javascript-time-ago";
+  import Meta from "$lib/components/meta/meta.svelte";
 
   const { data } = $props();
 
@@ -64,6 +65,8 @@
   }
 </script>
 
+<Meta title={$_("admin.articles.title")} description={null} />
+
 <div class="py-3 sm:py-6 sm:pl-6">
   <div class="flex items-center justify-between mb-6 px-3 sm:px-0">
     <h1 class="text-2xl font-bold">{$_("admin.articles.title")}</h1>