implement claim submit

frontend/client-portal/src/store/index.ts

@@ -0,0 +1,12 @@
+import { configureStore } from '@reduxjs/toolkit';
+import claimSubmit from './claimSubmit';
+
+const store = configureStore({
+  reducer: {
+    claims: claimSubmit,
+  },
+});
+
+export type RootState = ReturnType<typeof store.getState>;
+
+export default store;