First commit

frontend/app/composables/useAccountActionsMenu.ts

@@ -0,0 +1,15 @@
+/* The open state of the ⋮ menu on a row of the admin dashboard, shared like the
+   other popups. One row's menu at a time, so it holds the id of the account
+   whose menu is open — '' when none is — rather than a boolean per row. */
+export function useAccountActionsMenu() {
+  const openId = useState<string>('account-actions-menu:open', () => '')
+
+  function show(id: string) {
+    openId.value = id
+  }
+  function hide() {
+    openId.value = ''
+  }
+
+  return { openId, show, hide }
+}