code generation2 api calls1 button1 customization support1 drag-and-drop1 horizontal stack1 ios1 login page1 native app1 perfex crm1 perfex crm add-ons1 perfex crm extension1 perfex crm module1 perfex crm qr1 prebuilt templates1 qr code1 qr code enhancement1 qr code features1 qr code generator1 qr code management1 qr code tools1 qr code utilities1 qr for perfex crm1 qrplus1 register page1 swiftui1 template builder1 text field1 ui customization1