feat(widget): sync destination and source chains on token selection

packages/widget/src/components/TokenList/useTokenSelect.ts

@@ -17,7 +17,10 @@ export const useTokenSelect = (formType: FormType, onClick?: () => void) => {
   const emitter = useWidgetEvents()
   const { setFieldValue, getFieldValues } = useFieldActions()
   const autoPopulateToAddress = useToAddressAutoPopulate()
-  const setChain = useChainOrderStore((state) => state.setChain)
+  const [setChain, setIsAllNetworks] = useChainOrderStore((state) => [
+    state.setChain,
+    state.setIsAllNetworks,
+  ])
 
   const tokenKey = FormKeyHelper.getTokenKey(formType)
 
@@ -67,12 +70,18 @@ export const useTokenSelect = (formType: FormType, onClick?: () => void) => {
       }
 
       // If no opposite token is selected, synchronize the opposite chain
-      // to match the currently selected chain (if allowed)
+      // to match the currently selected chain (if allowed).
+      // In default exchange mode, also collapse "All Networks" on the opposite
+      // side - same-chain swap is the most common action.
       if (
         !selectedOppositeTokenAddress &&
         selectedChainId &&
         isItemAllowed(selectedChainId, chainsConfig?.[oppositeFormType])
       ) {
+        const isDefaultExchange = !subvariant || subvariant === 'default'
+        if (isDefaultExchange) {
+          setIsAllNetworks(false, oppositeFormType)
+        }
         setFieldValue(
           FormKeyHelper.getChainKey(oppositeFormType),
           selectedChainId,
@@ -115,6 +124,7 @@ export const useTokenSelect = (formType: FormType, onClick?: () => void) => {
       getFieldValues,
       onClick,
       setChain,
+      setIsAllNetworks,
       setFieldValue,
       subvariant,
       splitSubvariant,