删除服务端材质渲染功能及system_config表，转为环境变量配置，初步配置管理员功能

internal/middleware/auth.go

@@ -6,7 +6,7 @@ import (
 	"strings"
 
 	"carrotskin/pkg/auth"
-	
+
 	"github.com/gin-gonic/gin"
 )
 
@@ -51,7 +51,7 @@ func AuthMiddleware(jwtService *auth.JWTService) gin.HandlerFunc {
 		// 将用户信息存储到上下文中
 		c.Set("user_id", claims.UserID)
 		c.Set("username", claims.Username)
-		c.Set("role", claims.Role)
+		c.Set("user_role", claims.Role)
 
 		c.Next()
 	})
@@ -69,7 +69,7 @@ func OptionalAuthMiddleware(jwtService *auth.JWTService) gin.HandlerFunc {
 				if err == nil {
 					c.Set("user_id", claims.UserID)
 					c.Set("username", claims.Username)
-					c.Set("role", claims.Role)
+					c.Set("user_role", claims.Role)
 				}
 			}
 		}