fix(uploads): serve private previews through API and show batch cover status

services/api/internal/uploads/handler.go

@@ -17,17 +17,18 @@ import (
 type Handler struct {
 	svc    *Service
 	signer *sign.Signer
-	xAccel bool
 }
 
 // NewHandler создаёт обработчик. signer подписывает ссылки прослушивания из staging.
-func NewHandler(svc *Service, signer *sign.Signer, xAccel bool) *Handler {
-	return &Handler{svc: svc, signer: signer, xAccel: xAccel}
+func NewHandler(svc *Service, signer *sign.Signer) *Handler {
+	return &Handler{svc: svc, signer: signer}
 }
 
 func (h *Handler) fileDTO(ctx context.Context, f File) gen.UploadFile {
+	hasCover := f.CoverPath != nil && *f.CoverPath != ""
 	out := gen.UploadFile{
-		Id: f.ID, BatchId: f.BatchID, BatchComment: f.BatchComment,
+		BatchHasCover: &hasCover,
+		Id:            f.ID, BatchId: f.BatchID, BatchComment: f.BatchComment,
 		Author: gen.UserRef{Id: f.AuthorID, Username: f.AuthorName},
 		Status: gen.UploadStatus(f.Status), OriginalName: f.OriginalName, ClientRelPath: f.ClientRelPath,
 		SizeBytes: f.Size, ReceivedBytes: f.Received, Format: f.Format, Codec: f.Codec, Bitrate: f.Bitrate,