chore: fix all lint errors and format codebase

- Remove unused `or` import in comments resolver
- Remove unused `users` import in recordings resolver
- Add index keys to pagination {#each} loops in videos, models, magazine
- Remove stale svelte-ignore comment in header (a11y warnings no longer fired)

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

packages/frontend/src/lib/components/header/header.svelte

@@ -178,7 +178,6 @@
 </header>
 
 <!-- Backdrop -->
-<!-- svelte-ignore a11y_click_events_have_key_events a11y_no_static_element_interactions a11y_no_noninteractive_element_interactions -->
 <div
   role="presentation"
   class={`fixed inset-0 z-40 bg-black/60 backdrop-blur-sm transition-opacity duration-300 lg:hidden ${isMobileMenuOpen ? "opacity-100 pointer-events-auto" : "opacity-0 pointer-events-none"}`}