Fix claim server setting persistence in AccountViewView

- Add user-specific settings save to onClickSaveApiServer() method
- Ensures API server changes persist for current user account
- Aligns with pattern used by other server settings (partner, push)
- Resolves issue where claim server changes weren't "sticking"

src/views/AccountViewView.vue

@@ -1436,6 +1436,10 @@ export default class AccountViewView extends Vue {
       apiServer: this.apiServerInput,
     });
     this.apiServer = this.apiServerInput;
+    // Add this line to save to user-specific settings
+    await this.$saveUserSettings(this.activeDid, {
+      apiServer: this.apiServer,
+    });
   }
 
   async onClickSavePartnerServer(): Promise<void> {