feat: wire public posts api

src/api.ts

@@ -44,6 +44,11 @@ export async function postJSON<T>(
   return res.json() as Promise<T>;
 }
 
+export async function postNoBody(path: string): Promise<void> {
+  const res = await fetch(`${apiBase}${path}`, { method: "POST" });
+  if (!res.ok) throw new Error(await res.text());
+}
+
 export async function putJSON<T>(
   path: string,
   body: unknown,