Fix ClaimView affirm delivery action

- Add offer context support to gifting flow
- Add offerId prop to EntitySelectionStep for offer fulfillment context
- Pass offerId through GiftedDialog to EntitySelectionStep
- Update ContactGiftingView to handle offerId from route query parameters
- Extract offer details (description, amount, unitCode) for pre-population

src/components/EntitySelectionStep.vue

@@ -146,6 +146,10 @@ export default class EntitySelectionStep extends Vue {
   @Prop({ default: "HUR" })
   unitCode!: string;
 
+  /** Offer ID for context when fulfilling an offer */
+  @Prop({ default: "" })
+  offerId!: string;
+
   /** Notification function from parent component */
   @Prop()
   notify?: (notification: NotificationIface, timeout?: number) => void;
@@ -242,6 +246,7 @@ export default class EntitySelectionStep extends Vue {
       description: this.description,
       amountInput: this.amountInput,
       unitCode: this.unitCode,
+      offerId: this.offerId,
       ...(this.stepType === "giver"
         ? {
             recipientProjectId: this.toProjectId || "",