remove lastName and just have a single name field

src/views/AccountViewView.vue

@@ -52,7 +52,7 @@
 
     <!-- Identity Details -->
     <div class="bg-slate-100 rounded-md overflow-hidden px-4 py-3 mb-4">
-      <h2 class="text-xl font-semibold mb-2">{{ firstName }} {{ lastName }}</h2>
+      <h2 class="text-xl font-semibold mb-2">{{ givenName }}</h2>
 
       <div class="text-slate-500 text-sm font-bold">ID</div>
       <div class="text-sm text-slate-500 flex justify-start items-center mb-1">
@@ -372,7 +372,7 @@ interface SettingsType {
   activeDid?: string;
   apiServer?: string;
   firstName?: string;
-  lastName?: string;
+  lastName?: string; // deprecated, pre v 0.1.3
   showContactGivesInline?: boolean;
 }
 
@@ -386,8 +386,7 @@ export default class AccountViewView extends Vue {
   apiServer = "";
   apiServerInput = "";
   derivationPath = "";
-  firstName = "";
-  lastName = "";
+  givenName = "";
   numAccounts = 0;
   publicHex = "";
   publicBase64 = "";
@@ -510,11 +509,12 @@ export default class AccountViewView extends Vue {
    * @param {SettingsType} settings - Object containing settings from the database.
    */
   initializeState(settings: SettingsType | undefined) {
-    this.activeDid = settings?.activeDid || "";
-    this.apiServer = settings?.apiServer || "";
-    this.apiServerInput = settings?.apiServer || "";
-    this.firstName = settings?.firstName || "";
-    this.lastName = settings?.lastName || "";
+    this.activeDid = (settings?.activeDid as string) || "";
+    this.apiServer = (settings?.apiServer as string) || "";
+    this.apiServerInput = (settings?.apiServer as string) || "";
+    this.givenName =
+      (settings?.firstName || "") +
+      (settings?.lastName ? ` ${settings.lastName}` : ""); // pre v 0.1.3
     this.showContactGives = !!settings?.showContactGivesInline;
   }
 
@@ -531,7 +531,7 @@ export default class AccountViewView extends Vue {
     ) {
       this.publicHex = identity.keys[0].publicKeyHex;
       this.publicBase64 = Buffer.from(this.publicHex, "hex").toString("base64");
-      this.derivationPath = identity.keys[0].meta.derivationPath;
+      this.derivationPath = identity.keys[0].meta.derivationPath as string;
 
       db.settings.update(MASTER_SETTINGS_KEY, {
         activeDid: identity.did,