This endpoint allows administrators to enable or disable modules, customize form fields, adjust appearance (such as colors, fonts, and sizes), and configure integrations like WhatsApp or lead forms. The update is applied atomically, ensuring that all provided settings replace the previous configuration. This endpoint is crucial for businesses that want to tailor the client-facing widget to match their branding, improve user experience, or integrate with marketing and communication tools. Proper validation is performed to ensure the integrity and consistency of the widget configuration before saving.