Realtime sync UI preferences between tabs

app/stores/AuthStore.ts

@@ -108,22 +108,21 @@ export default class AuthStore extends Store<Team> {
     // signin/signout events in other tabs and follow suite.
     window.addEventListener("storage", (event) => {
       if (event.key === AUTH_STORE && event.newValue) {
-        const data: PersistedData | null | undefined = JSON.parse(
-          event.newValue
-        );
+        const newData: PersistedData | null = JSON.parse(event.newValue);
+
         // data may be null if key is deleted in localStorage
-        if (!data) {
+        if (!newData) {
           return;
         }
 
         // If we're not signed in then hydrate from the received data, otherwise if
         // we are signed in and the received data contains no user then sign out
         if (this.authenticated) {
-          if (data.user === null) {
+          if (newData.user === null) {
             void this.logout(false, false);
           }
         } else {
-          this.rehydrate(data);
+          this.rehydrate(newData);
         }
       }
     });