refactor(prisma): 统一导入prisma客户端方式

- 所有控制器中从libs/prisma.ts导入prisma替代旧的libs/db.ts
- 规范了step模块中zod验证架构的格式与换行
- 生成Prisma客户端及类型定义文件，包含browser、client、commonInputTypes、enums和内部类文件
- 优化listStepsQuerySchema默认参数与链式调用格式
- 保持代码风格一致，提升可维护性和类型安全性

apps/server/prisma/schema.prisma

@@ -2,13 +2,12 @@
 // learn more about it in the docs: https://pris.ly/d/prisma-schema
 
 generator client {
-  provider = "prisma-client-js"
-  output   = "../generated/prisma"
+  provider = "prisma-client"
+  output = "../generated"
 }
 
 datasource db {
   provider = "sqlite"
-  url      = env("DATABASE_URL")
 }
 
 model Project {