Replaced redux with zustand. Fixed login issue, closes #980.

hooks/useShareToken.js

@@ -1,19 +1,19 @@
 import { useEffect } from 'react';
-import { useDispatch, useSelector } from 'react-redux';
 import { useRouter } from 'next/router';
 import { get } from 'lib/web';
-import { setShareToken } from 'redux/actions/app';
+import useStore, { setShareToken } from 'store/app';
+
+const selector = state => state.shareToken;
 
 export default function useShareToken(shareId) {
   const { basePath } = useRouter();
-  const dispatch = useDispatch();
-  const shareToken = useSelector(state => state.app.shareToken);
+  const shareToken = useStore(selector);
 
   async function loadToken(id) {
     const { data } = await get(`${basePath}/api/share/${id}`);
 
     if (data) {
-      dispatch(setShareToken(data));
+      setShareToken(data);
     }
   }