fix: match permit deadline to order validTo for CoW limit orders

src/components/transactions/Swap/actions/CollateralSwap/CollateralSwapActionsViaCoWAdapters.tsx

@@ -137,6 +137,7 @@ export const CollateralSwapActionsViaCowAdapters = ({
     allowPermit: !disablePermitDueToActiveOrder, // CoW Adapters do support permit but avoid nonce reuse
     trackingHandlers,
     swapType: state.swapType,
+    validTo,
   });
 
   // Use centralized gas estimation

src/components/transactions/Swap/actions/DebtSwap/DebtSwapActionsViaCoW.tsx

@@ -152,6 +152,7 @@ export const DebtSwapActionsViaCoW = ({
     type: 'delegation', // Debt swap uses delegation
     trackingHandlers,
     swapType: state.swapType,
+    validTo,
   });
 
   // Use centralized gas estimation

src/components/transactions/Swap/actions/RepayWithCollateral/RepayWithCollateralActionsViaCoW.tsx

@@ -150,6 +150,7 @@ export const RepayWithCollateralActionsViaCoW = ({
     allowPermit: !disablePermitDueToActiveOrder, // avoid nonce reuse if active order present
     trackingHandlers,
     swapType: state.swapType,
+    validTo,
   });
 
   // Use centralized gas estimation

src/components/transactions/Swap/actions/SwapActions/SwapActionsViaCoW.tsx

@@ -81,6 +81,11 @@ export const SwapActionsViaCoW = ({
     state.sourceToken.addressToSwap
   );
 
+  const validTo = useMemo(
+    () => Math.floor(Date.now() / 1000) + ExpiryToSecondsMap[state.expiry],
+    [state.expiry]
+  );
+
   const {
     requiresApproval,
     requiresApprovalReset,
@@ -101,6 +106,7 @@ export const SwapActionsViaCoW = ({
     allowPermit: !disablePermitDueToActiveOrder,
     trackingHandlers,
     swapType: state.swapType,
+    validTo,
   });
 
   // Use centralized gas estimation
@@ -112,11 +118,6 @@ export const SwapActionsViaCoW = ({
     approvalTxState,
   });
 
-  const validTo = useMemo(
-    () => Math.floor(Date.now() / 1000) + ExpiryToSecondsMap[state.expiry],
-    [state.expiry]
-  );
-
   const { sendTx } = useWeb3Context();
 
   const slippageInPercent = state.slippage;

src/components/transactions/Swap/actions/approval/useSwapTokenApproval.ts

@@ -33,6 +33,9 @@ export type SwapTokenApprovalParams = {
   type?: 'approval' | 'delegation';
   trackingHandlers?: TrackAnalyticsHandlers;
   swapType: SwapType;
+  /** Unix timestamp (seconds) for the order's validTo. When provided, the permit deadline
+   *  will match this value so the permit stays valid for the order's entire lifetime. */
+  validTo?: number;
 };
 
 export type SignatureLike = {
@@ -93,6 +96,7 @@ export const useSwapTokenApproval = ({
   type = 'approval',
   trackingHandlers,
   swapType,
+  validTo,
 }: SwapTokenApprovalParams) => {
   const [approvedAmount, setApprovedAmount] = useState<string | undefined>();
   const [approvedAddress, setApprovedAddress] = useState<string | undefined>();
@@ -335,7 +339,7 @@ export const useSwapTokenApproval = ({
     if (usePermit) {
       // Permit approval
       try {
-        const deadline = Math.floor(Date.now() / 1000 + 3600).toString();
+        const deadline = (validTo ?? Math.floor(Date.now() / 1000 + 3600)).toString();
         let signatureRequest: string;
         if (type === 'delegation') {
           signatureRequest = await generateCreditDelegationSignatureRequest({