fix(phase-4): request() skip res.json() for 204 No Content — fixes delete not updating UI

frontend/src/api/client.js

@@ -52,6 +52,7 @@ async function request(path, options = {}) {
     if (payload) err.payload = payload
     throw err
   }
+  if (res.status === 204 || res.headers.get('content-length') === '0') return null
   return res.json()
 }