Add project-to-project case

src/components/GiftedDialog.vue

@@ -885,6 +885,12 @@ export default class GiftedDialog extends Vue {
         toDid = undefined; // No person recipient
         fulfillsProjectHandleId = this.toProjectId; // Project recipient
         providerPlanHandleId = undefined; // No project giver
+      } else if (this.giverEntityType === "project" && this.recipientEntityType === "project") {
+        // Project-to-project gift
+        fromDid = undefined; // No person giver
+        toDid = undefined; // No person recipient
+        fulfillsProjectHandleId = this.toProjectId; // Project recipient
+        providerPlanHandleId = this.giver?.handleId; // Project giver
       } else {
         // Person-to-person gift
         fromDid = giverDid as string;