fix: make trash cleanup best effort

chfs-ng/internal/storage/storage.go

@@ -142,7 +142,10 @@ func (s Local) MoveToTrash(path, trashRoot string) error {
 	if e = movePath(p, target); e != nil {
 		return e
 	}
-	return cleanupTrash(trashRoot, 30*24*time.Hour)
+	// Cleanup is maintenance work; a successful move must not be reported as
+	// a failed delete merely because an unrelated stale trash entry is busy.
+	_ = cleanupTrash(trashRoot, 30*24*time.Hour)
+	return nil
 }
 
 func cleanupTrash(root string, maxAge time.Duration) error {