完善站点运营设置：分路由管理、登录可见评论、邮件模板内联与关闭注册 SSR。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/service/brand_store.go

@@ -2,6 +2,7 @@ package service
 
 import (
 	"bytes"
+	"context"
 	"crypto/rand"
 	"encoding/hex"
 	"errors"
@@ -10,6 +11,7 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"github.com/freefire/jiang13-bbs/model"
 )
@@ -134,6 +136,16 @@ func (s *UploadService) CopyBrandFromMedia(userID, attachmentID uint, slot strin
 	if err := s.db.Where("id = ? AND user_id = ?", attachmentID, userID).First(&att).Error; err != nil {
 		return "", errors.New("图片不存在或不属于你")
 	}
+	if strings.HasPrefix(att.URL, "/api/media/") && s.ops != nil {
+		ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+		defer cancel()
+		r, _, e := s.ops.OpenObject(ctx, RemoteObjectID(att.URL), true)
+		if e != nil {
+			return "", e
+		}
+		defer r.Close()
+		return s.SaveBrand(slot, r)
+	}
 	abs, ok := s.safeUploadPath(att.URL)
 	if !ok {
 		return "", errors.New("无效的图片地址")