fix(claims): handle single Offer object in fulfills field for ConfirmGiftView

Updated extractOfferFulfillment to support both array and single object
cases for the fulfills field, matching the fix applied to ClaimView.
Now handles when fulfills contains a single Offer object with @type "Offer".

src/views/ConfirmGiftView.vue

@@ -724,13 +724,18 @@ export default class ConfirmGiftView extends Vue {
     }
 
     const fulfills = this.giveDetails.fullClaim.fulfills;
-    if (!Array.isArray(fulfills)) {
-      this.giveDetailsOfferFulfillment = null;
-      return;
-    }
     
+    // Handle both array and single object cases
+    let offerFulfill = null;
+    
+    if (Array.isArray(fulfills)) {
       // Find the Offer in the fulfills array
-    const offerFulfill = fulfills.find((item) => item["@type"] === "Offer");
+      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,