精简后的项目：仅保留 api/ui 源码、文档、构建依赖

api/scanner/scanner_tasks/cleanup_tasks/media_cleanup_task.go

@@ -0,0 +1,22 @@
+package cleanup_tasks
+
+import (
+	"github.com/photoview/photoview/api/graphql/models"
+	"github.com/photoview/photoview/api/scanner/scanner_task"
+	"github.com/photoview/photoview/api/scanner/scanner_utils"
+)
+
+type MediaCleanupTask struct {
+	scanner_task.ScannerTaskBase
+}
+
+func (t MediaCleanupTask) AfterScanAlbum(ctx scanner_task.TaskContext, changedMedia []*models.Media,
+	albumMedia []*models.Media) error {
+
+	cleanupErrors := CleanupMedia(ctx.GetDB(), ctx.GetAlbum().ID, albumMedia)
+	for _, err := range cleanupErrors {
+		scanner_utils.ScannerError(ctx, "delete old media: %s", err)
+	}
+
+	return nil
+}