fix: resolve lint errors from ACL/admin implementation

- Remove unused requireOwnerOrAdmin import from videos.ts
- Remove unused requireAuth import from users.ts
- Remove unused GraphQLError import from articles.ts
- Replace URLSearchParams with SvelteURLSearchParams in admin users page
- Apply prettier formatting to all changed files

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

packages/frontend/src/routes/admin/+layout.svelte

@@ -16,9 +16,7 @@
 
 <div class="flex min-h-screen bg-background">
   <!-- Sidebar -->
-  <aside
-    class="w-56 shrink-0 border-r border-border/40 bg-card/60 backdrop-blur-sm flex flex-col"
-  >
+  <aside class="w-56 shrink-0 border-r border-border/40 bg-card/60 backdrop-blur-sm flex flex-col">
     <div class="px-4 py-5 border-b border-border/40">
       <a href="/" class="text-xs text-muted-foreground hover:text-foreground transition-colors">
         ← Back to site