chore: suit eslint rules

packages/web/src/pages/Editor/create.tsx

@@ -10,7 +10,7 @@ import { CREATE_FLOW } from 'graphql/mutations/create-flow';
 
 import Box from '@mui/material/Box';
 
-export default function CreateFlow() {
+export default function CreateFlow(): React.ReactElement {
   const navigate = useNavigate();
   const formatMessage = useFormatMessage();
   const [createFlow] = useMutation(CREATE_FLOW);

packages/web/src/pages/Editor/index.tsx

@@ -1,6 +1,7 @@
+import * as React from 'react';
 import EditorLayout from 'components/EditorLayout';
 
-export default function FlowEditor() {
+export default function FlowEditor(): React.ReactElement {
   return (
     <EditorLayout />
   )

packages/web/src/pages/Editor/routes.tsx

@@ -3,7 +3,7 @@ import { Routes, Route } from 'react-router-dom';
 import CreateFlowPage from './create';
 import EditorPage from './index';
 
-export default function EditorRoutes() {
+export default function EditorRoutes(): React.ReactElement {
   return (
     <Routes>
       <Route path="/create" element={<CreateFlowPage />} />