YunaiV/ruoyi-vue-pro ? reverse-engineered prompt

Build me a comprehensive, all-in-one backend system for a business. It should be built using Java and Spring Boot, with a modern and clean admin dashboard using Vue.

I need it to handle all the essential business functions from a single platform. This includes robust user management with different roles and permissions, and it absolutely needs to support a multi-tenant structure, so we can isolate data for different customers. A key feature is a visual workflow builder, allowing us to design and automate processes like leave requests or expense approvals without coding.

It should also come with a suite of built-in modules for common business needs, like a CRM for managing customers, an ERP for internal resources, and even a full-featured e-commerce商城 (mall). Make sure it includes integrations for payments, SMS notifications, and third-party logins.