Fix: re-organize entity type conditional logic in gifting flow

- Add conditional checks for person vs project entity types when setting DID fields
- Simplify project ID assignment logic by removing redundant entity type checks
- Preserve existing recipient context when selecting givers in ContactGiftingView, especially when dealing with "Unnamed" entity

src/components/GiftDetailsStep.vue

@@ -315,16 +315,15 @@ export default class GiftDetailsStep extends Vue {
         giverName: this.giver?.name,
         offerId: this.offerId,
         fulfillsProjectId:
-          this.giverEntityType === "person" &&
-          this.recipientEntityType === "project"
-            ? this.toProjectId
-            : undefined,
+          this.recipientEntityType === "project" ? this.toProjectId : undefined,
         providerProjectId:
-          this.giverEntityType === "project" &&
-          this.recipientEntityType === "person"
+          this.giverEntityType === "project"
             ? this.giver?.handleId
             : this.fromProjectId,
-        recipientDid: this.receiver?.did,
+        recipientDid:
+          this.recipientEntityType === "person"
+            ? this.receiver?.did
+            : undefined,
         recipientName: this.receiver?.name,
         unitCode: this.localUnitCode,
       },