Migrate ContactQRScan views to use mixin parseJsonField

Replace databaseUtil parseJsonField imports with PlatformServiceMixin
_parseJsonField method in ContactQRScanFullView.vue and ContactQRScanShowView.vue.
Use type assertion for mixin method access. Maintains functionality while
removing static databaseUtil dependency.

src/views/ContactQRScanFullView.vue

@@ -121,7 +121,7 @@ import {
 } from "../libs/endorserServer";
 import UserNameDialog from "../components/UserNameDialog.vue";
 import { retrieveAccountMetadata } from "../libs/util";
-import { parseJsonField } from "../db/databaseUtil";
+
 import { Account } from "@/db/tables/accounts";
 import { PlatformServiceMixin } from "@/utils/PlatformServiceMixin";
 import {
@@ -556,7 +556,7 @@ export default class ContactQRScanFull extends Vue {
       // Add new contact
       // @ts-expect-error because we're just using the value to store to the DB
       contact.contactMethods = JSON.stringify(
-        parseJsonField(contact.contactMethods, []),
+        (this as any)._parseJsonField(contact.contactMethods, []),
       );
       await this.$insertContact(contact);