fix: improve handling of config and rte plugin

remix/app/hooks/useApp.ts

@@ -4,6 +4,7 @@ import { useEffect, useState } from "react"
 export class SDKLoadingError extends Error {}
 
 export default function useApp() {
+  const modalElementId = "field"
   const [, setError] = useState()
   const [sdk, setSdk] = useState<UiLocation>()
   const [config, setConfig] = useState<Record<string, string>>()
@@ -19,7 +20,7 @@ export default function useApp() {
         const config = await initSdk.getConfig()
         setConfig(config)
 
-        const iframeWrapperRef = document.getElementById("field")
+        const iframeWrapperRef = document.getElementById(modalElementId)
         window.iframeRef = iframeWrapperRef
         window.postRobot = initSdk.postRobot
       } catch (e) {
@@ -42,5 +43,6 @@ export default function useApp() {
   return {
     sdk,
     config,
+    modalElementId,
   }
 }