refactor: remove directus.ts shim, import directly from api

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

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

@@ -5,7 +5,7 @@
   import type { AuthStatus } from "$lib/types";
   import { logout } from "$lib/services";
   import { goto } from "$app/navigation";
-  import { getAssetUrl } from "$lib/directus";
+  import { getAssetUrl } from "$lib/api";
   import LogoutButton from "../logout-button/logout-button.svelte";
   import Separator from "../ui/separator/separator.svelte";
   import { Avatar, AvatarFallback, AvatarImage } from "$lib/components/ui/avatar";