更新开发者平台：代理商管理、版本管理、UI优化

backend/internal/middleware/middleware.go

@@ -134,6 +134,26 @@ func DeveloperAuth() gin.HandlerFunc {
 	}
 }
 
+// AgentAuth 代理商授权中间件
+func AgentAuth() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		role, exists := c.Get("role")
+		if !exists {
+			response.Error(c, http.StatusForbidden, "Access denied")
+			c.Abort()
+			return
+		}
+
+		if role != "agent" && role != "admin" {
+			response.Error(c, http.StatusForbidden, "Agent access required")
+			c.Abort()
+			return
+		}
+
+		c.Next()
+	}
+}
+
 // PackageAuth 套餐授权中间件
 func PackageAuth() gin.HandlerFunc {
 	return func(c *gin.Context) {