wallet-ext: disable stake coins

* allow users to navigate to stake home view but disable staking new coins
* see MystenLabs@e929c1a and MystenLabs#3616 for more details on why this was disabled

wallet/configs/environment/.env.defaults

@@ -12,3 +12,4 @@ EXPLORER_URL_LOCAL=http://localhost:8080/
 EXPLORER_URL_DEV_NET=https://explorer.devnet.sui.io/
 EXPLORER_URL_STAGING=https://explorer.staging.sui.io/
 SHOW_STAGING=false
+STAKING_ENABLED=false

wallet/src/ui/app/staking/home/index.tsx

@@ -12,6 +12,7 @@ import Button from '_app/shared/button';
 import CoinBalance from '_app/shared/coin-balance';
 import PageTitle from '_app/shared/page-title';
 import StatsCard, { StatsRow, StatsItem } from '_app/shared/stats-card';
+import { STAKING_ENABLED } from '_app/staking';
 import {
     activeDelegationIDsSelector,
     totalActiveStakedSelector,
@@ -134,6 +135,8 @@ function StakeHome() {
                         mode="primary"
                         className={st.action}
                         href="new"
+                        title="Currently disabled"
+                        disabled={!STAKING_ENABLED}
                     >
                         Stake Coins
                         <Icon

wallet/src/ui/app/staking/index.tsx

@@ -6,9 +6,13 @@ import { Route } from 'react-router-dom';
 import StakeHome from './home';
 import StakeNew from './stake';
 
+export const STAKING_ENABLED = process.env.STAKING_ENABLED === 'true';
+
 export const routes = (
     <>
         <Route path="stake" element={<StakeHome />} />
-        <Route path="stake/new" element={<StakeNew />} />
+        {STAKING_ENABLED ? (
+            <Route path="stake/new" element={<StakeNew />} />
+        ) : null}
     </>
 );