产品经理美人鱼图解业务

I am a non-technical product manager, and I want to deeply organize the business logic using Mermaid diagrams. Please help me analyze which points are worth exploring within this. Help me write several detailed explanatory documents and place them in docs/explain/*.md. Use Mermaid syntax extensively in the documents to visualize these logics—the more detailed, the better, the more detailed, the better, the more detailed, the better. Even if I don't understand the technology, I should be able to see the direction of the business logic at a glance. Thank you for your hard work!