Fix globals fetch to handle singleton collection shape

frontend/src/lib/directus.ts

@@ -45,6 +45,15 @@ export async function directusOne<T>(collection: string, q: DirectusQuery = {}):
   return data[0]
 }
 
+export async function directusSingleton<T>(collection: string, q: DirectusQuery = {}): Promise<T> {
+  const url = new URL(`${DIRECTUS_URL}/items/${collection}`)
+  for (const field of q.fields ?? []) url.searchParams.append('fields[]', field)
+  const res = await fetch(url.toString())
+  if (!res.ok) throw new Error(`Directus error ${res.status} on /items/${collection}`)
+  const { data } = (await res.json()) as DirectusItemResponse<T>
+  return data
+}
+
 export function assetUrl(fileId: string | null | undefined, key?: string): string {
   if (!fileId) return ''
   const url = new URL(`${DIRECTUS_URL}/assets/${fileId}`)