fix: 删除版本时恢复被取代的旧版本, 回滚时处理取代版本已删除的情况

backend/internal/router/admin/versions.go

@@ -800,6 +800,15 @@ func handleBatchDeleteVersions(c *gin.Context) {
 		return
 	}
 
+	// 恢复被删除版本取代的旧版本为 published
+	database.DB.Model(&model.Version{}).
+		Where("superseded_by IN ?", req.IDs).
+		Updates(map[string]interface{}{
+			"publish_status": "published",
+			"superseded_by":  nil,
+			"deprecated_at":  nil,
+		})
+
 	response.Success(c, nil)
 }
 
@@ -1152,6 +1161,35 @@ func handleRollbackVersion(c *gin.Context) {
 		return
 	}
 
+	// 检查取代它的版本是否还存在，如果不存在则直接恢复
+	if version.SupersededBy != nil {
+		var superseder model.Version
+		if err := database.DB.First(&superseder, *version.SupersededBy).Error; err != nil {
+			// 取代版本已被删除，直接恢复为 published
+			version.PublishStatus = "published"
+			version.SupersededBy = nil
+			version.DeprecatedAt = nil
+			database.DB.Save(&version)
+
+			userIDPtr := &userID
+			versionIDPtr := &version.ID
+			service.CreateLog(service.LogParams{
+				UserID:     userIDPtr,
+				LogType:    "version",
+				Action:     "rollback",
+				Resource:   "version",
+				ResourceID: versionIDPtr,
+				Details:    fmt.Sprintf("回滚版本(取代版本已删除): %s (应用ID: %d)", version.Version, version.ApplicationID),
+			})
+
+			response.Success(c, gin.H{
+				"id":             version.ID,
+				"publish_status": version.PublishStatus,
+			})
+			return
+		}
+	}
+
 	now := time.Now()
 	version.PublishStatus = "published"
 	version.SupersededBy = nil