Refactor

app/src/index.tsx

@@ -3,19 +3,17 @@ import * as ReactDOM from 'react-dom'
 import { Provider } from 'react-redux'
 import { createStore } from 'redux'
 import { MuiThemeProvider, createMuiTheme } from '@material-ui/core/styles'
-
-import reducers, { NodeOrder } from './reducers'
+import reducers, { NodeOrder, AppState } from './reducers'
 import App from './App'
 
-declare var document: any
-
-const initialAppState = {
+const initialAppState: AppState = {
   settings: {
     autoExpandLimit: 0,
     nodeOrder: NodeOrder.none,
     visible: false,
   },
-  selectedNode: undefined,
+  sidebar: {},
+  selectedTopic: undefined,
 }
 const store = createStore(reducers, initialAppState)