refactor(claims): extract offer fulfillment logic to utility function

Created extractOfferFulfillment utility in libs/util.ts to handle both
array and single object cases for fulfills field. Updated ClaimView and
ConfirmGiftView to use the shared utility, eliminating code duplication
and improving maintainability.

src/libs/util.ts

@@ -159,6 +159,41 @@ export const isGiveAction = (
   return isGiveClaimType(veriClaim.claimType);
 };
 
+export interface OfferFulfillment {
+  offerHandleId: string;
+  offerType: string;
+}
+
+/**
+ * Extract offer fulfillment information from the fulfills field
+ * Handles both array and single object cases
+ */
+export const extractOfferFulfillment = (fulfills: any): OfferFulfillment | null => {
+  if (!fulfills) {
+    return null;
+  }
+  
+  // Handle both array and single object cases
+  let offerFulfill = null;
+  
+  if (Array.isArray(fulfills)) {
+    // Find the Offer in the fulfills array
+    offerFulfill = fulfills.find((item) => item["@type"] === "Offer");
+  } else if (fulfills["@type"] === "Offer") {
+    // fulfills is a single Offer object
+    offerFulfill = fulfills;
+  }
+  
+  if (offerFulfill) {
+    return {
+      offerHandleId: offerFulfill.identifier,
+      offerType: offerFulfill["@type"],
+    };
+  }
+  
+  return null;
+};
+
 export const shortDid = (did: string) => {
   if (did.startsWith("did:peer:")) {
     return (

src/views/ClaimView.vue

@@ -733,32 +733,9 @@ export default class ClaimView extends Vue {
    * Extract offer fulfillment information from the fulfills array
    */
   extractOfferFulfillment() {
-    if (!this.detailsForGive?.fullClaim?.fulfills) {
-      this.detailsForGiveOfferFulfillment = null;
-      return;
-    }
-
-    const fulfills = this.detailsForGive.fullClaim.fulfills;
-    
-    // Handle both array and single object cases
-    let offerFulfill = null;
-    
-    if (Array.isArray(fulfills)) {
-      // Find the Offer in the fulfills array
-      offerFulfill = fulfills.find((item) => item["@type"] === "Offer");
-    } else if (fulfills["@type"] === "Offer") {
-      // fulfills is a single Offer object
-      offerFulfill = fulfills;
-    }
-    
-    if (offerFulfill) {
-      this.detailsForGiveOfferFulfillment = {
-        offerHandleId: offerFulfill.identifier,
-        offerType: offerFulfill["@type"],
-      };
-    } else {
-      this.detailsForGiveOfferFulfillment = null;
-    }
+    this.detailsForGiveOfferFulfillment = libsUtil.extractOfferFulfillment(
+      this.detailsForGive?.fullClaim?.fulfills
+    );
   }
 
   // =================================================

src/views/ConfirmGiftView.vue

@@ -718,32 +718,9 @@ export default class ConfirmGiftView extends Vue {
    * Extract offer fulfillment information from the fulfills array
    */
   private extractOfferFulfillment() {
-    if (!this.giveDetails?.fullClaim?.fulfills) {
-      this.giveDetailsOfferFulfillment = null;
-      return;
-    }
-
-    const fulfills = this.giveDetails.fullClaim.fulfills;
-    
-    // Handle both array and single object cases
-    let offerFulfill = null;
-    
-    if (Array.isArray(fulfills)) {
-      // Find the Offer in the fulfills array
-      offerFulfill = fulfills.find((item) => item["@type"] === "Offer");
-    } else if (fulfills["@type"] === "Offer") {
-      // fulfills is a single Offer object
-      offerFulfill = fulfills;
-    }
-    
-    if (offerFulfill) {
-      this.giveDetailsOfferFulfillment = {
-        offerHandleId: offerFulfill.identifier,
-        offerType: offerFulfill["@type"],
-      };
-    } else {
-      this.giveDetailsOfferFulfillment = null;
-    }
+    this.giveDetailsOfferFulfillment = libsUtil.extractOfferFulfillment(
+      this.giveDetails?.fullClaim?.fulfills
+    );
   }
 
   /**