Service list and minio status (#13480)

### What problem does this PR solve?

1. Resolve standard user can access admin service
2. Get RAGFlow service status
3. Fix minio status fetching

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

internal/admin/handler.go

@@ -644,7 +644,10 @@ func (h *Handler) GetUserPermission(c *gin.Context) {
 func (h *Handler) GetServices(c *gin.Context) {
 	services, err := h.service.GetAllServices()
 	if err != nil {
-		errorResponse(c, err.Error(), 500)
+		c.JSON(http.StatusInternalServerError, gin.H{
+			"code":    common.CodeServerError,
+			"message": err.Error(),
+		})
 		return
 	}
 
@@ -932,6 +935,14 @@ func (h *Handler) AuthMiddleware() gin.HandlerFunc {
 			return
 		}
 
+		if !*user.IsSuperuser {
+			c.JSON(http.StatusForbidden, gin.H{
+				"code":    common.CodeForbidden,
+				"message": "Permission denied",
+			})
+			return
+		}
+
 		c.Set("user", user)
 		c.Set("user_id", user.ID)
 		c.Set("email", user.Email)