feat: enhance GenericVerifiableCredential interface with explicit optional properties

- Add name, description, and agent as optional properties to GenericVerifiableCredential
- Improve type safety and IntelliSense for common claim properties
- Maintain backward compatibility with existing code
- Reduce need for type assertions when accessing claim properties

src/components/GiftedPrompts.vue

@@ -75,7 +75,6 @@ import { Vue, Component } from "vue-facing-decorator";
 import { Router } from "vue-router";
 
 import { AppString, NotificationIface } from "../constants/app";
-import { db } from "../db/index";
 import { Contact } from "../db/tables/contacts";
 import * as databaseUtil from "../db/databaseUtil";
 import { GiverReceiverInputInfo } from "../libs/util";