fix: reset trade confirm state on unmount to allow surplus modal on account pages (#7213)

Co-authored-by: Elena <70885163+elena-zh@users.noreply.github.com>
Co-authored-by: kernelwhisperer <hello@danielconstantin.net>

Author: 3 people

apps/cowswap-frontend/src/modules/trade/containers/TradeWidget/TradeWidgetModals.tsx

@@ -1,4 +1,3 @@
-/* eslint-disable complexity */
 import { ReactNode, useCallback, useEffect, useRef } from 'react'
 
 import { usePrevious } from '@cowprotocol/common-hooks'
@@ -106,6 +105,16 @@ export function TradeWidgetModals({
 
   const error = tokenListAddingError || approveError || confirmError
 
+  /**
+   * Reset trade confirm state on unmount so SurplusModalSetup
+   * doesn't see stale isOpen/transactionHash after navigation
+   */
+  useEffect(() => {
+    return () => {
+      closeTradeConfirm()
+    }
+  }, [closeTradeConfirm])
+
   /**
    * Close all modals besides auto-import on account change
    */