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

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

packages/frontend/src/routes/models/+page.svelte

@@ -4,7 +4,7 @@
   import { Card, CardContent } from "$lib/components/ui/card";
   import { Input } from "$lib/components/ui/input";
   import { Select, SelectContent, SelectItem, SelectTrigger } from "$lib/components/ui/select";
-  import { getAssetUrl } from "$lib/directus";
+  import { getAssetUrl } from "$lib/api";
   import Meta from "$lib/components/meta/meta.svelte";
 
   let searchQuery = $state("");