feat: 实现注册优惠码功能

- 支持创建/编辑/删除优惠码，设置赠送金额和使用限制 - 注册页面实时验证优惠码并显示赠送金额 - 支持 URL 参数自动填充 (?promo=CODE) - 添加优惠码验证接口速率限制 - 使用数据库行锁防止并发超限 - 新增后台优惠码管理页面，支持复制注册链接

feat: 实现注册优惠码功能
- 支持创建/编辑/删除优惠码，设置赠送金额和使用限制 - 注册页面实时验证优惠码并显示赠送金额 - 支持 URL 参数自动填充 (?promo=CODE) - 添加优惠码验证接口速率限制 - 使用数据库行锁防止并发超限 - 新增后台优惠码管理页面，支持复制注册链接
d2fc14fb · long · 7d1fe818 · d2fc14fb · d2fc14fb · d2fc14fb
Commit d2fc14fb authored Jan 10, 2026 by long
--- a/backend/ent/user_create.go
+++ b/backend/ent/user_create.go
--- a/backend/ent/user_query.go
+++ b/backend/ent/user_query.go
--- a/backend/ent/user_update.go
+++ b/backend/ent/user_update.go
--- a/backend/ent/userallowedgroup_query.go
+++ b/backend/ent/userallowedgroup_query.go
--- a/backend/ent/userattributedefinition_query.go
+++ b/backend/ent/userattributedefinition_query.go
--- a/backend/ent/userattributevalue_query.go
+++ b/backend/ent/userattributevalue_query.go
--- a/backend/ent/usersubscription_query.go
+++ b/backend/ent/usersubscription_query.go
--- a/backend/internal/handler/admin/promo_handler.go
+++ b/backend/internal/handler/admin/promo_handler.go
--- a/backend/internal/handler/auth_handler.go
+++ b/backend/internal/handler/auth_handler.go
--- a/backend/internal/handler/dto/mappers.go
+++ b/backend/internal/handler/dto/mappers.go
--- a/backend/internal/handler/dto/types.go
+++ b/backend/internal/handler/dto/types.go
--- a/backend/internal/handler/handler.go
+++ b/backend/internal/handler/handler.go
--- a/backend/internal/handler/wire.go
+++ b/backend/internal/handler/wire.go
--- a/backend/internal/middleware/rate_limiter.go
+++ b/backend/internal/middleware/rate_limiter.go
--- a/backend/internal/repository/promo_code_repo.go
+++ b/backend/internal/repository/promo_code_repo.go
--- a/backend/internal/repository/wire.go
+++ b/backend/internal/repository/wire.go
--- a/backend/internal/server/http.go
+++ b/backend/internal/server/http.go
--- a/backend/internal/server/router.go
+++ b/backend/internal/server/router.go
--- a/backend/internal/server/routes/admin.go
+++ b/backend/internal/server/routes/admin.go
--- a/backend/internal/server/routes/auth.go
+++ b/backend/internal/server/routes/auth.go