refactor: 移除全局单例、修复分层违规、统一错误与响应

internal/handler/routes.go

@@ -4,7 +4,6 @@ import (
 	"carrotskin/internal/container"
 	"carrotskin/internal/middleware"
 	"carrotskin/pkg/auth"
-	"carrotskin/pkg/config"
 
 	"github.com/gin-gonic/gin"
 	swaggerFiles "github.com/swaggo/files"
@@ -40,11 +39,10 @@ func NewHandlers(c *container.Container) *Handlers {
 // RegisterRoutesWithDI 使用依赖注入注册所有路由
 func RegisterRoutesWithDI(router *gin.Engine, c *container.Container) {
 	// 健康检查路由
-	router.GET("/health", HealthCheck)
+	router.GET("/health", NewHealthCheck(c.DB, c.Redis))
 
 	// Swagger文档路由
-	cfg, _ := config.GetConfig()
-	if cfg != nil && cfg.Server.SwaggerEnabled {
+	if c.Config != nil && c.Config.Server.SwaggerEnabled {
 		router.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))
 	}