fix(uploads): refresh destination previews and improve queue layout

services/api/internal/uploads/placement.go

@@ -3,6 +3,8 @@ package uploads
 import (
 	"context"
 	"errors"
+	"path/filepath"
+	"strings"
 
 	"github.com/google/uuid"
 
@@ -47,6 +49,41 @@ type placement struct {
 	root     string
 }
 
+// previewPlacement uses the same current configuration as importFile. Finalized
+// files keep their recorded destination; reading the queue never changes a decision.
+func (s *PlacementPlanner) previewPlacement(ctx context.Context, f *File) {
+	f.TargetStoragePath = nil
+	if f.Meta != nil && (f.Status == StatusPendingReview || f.Status == StatusImportFailed || f.Status == StatusApproved) {
+		pl := s.plan(ctx, *f, *f.Meta, f.TargetSourceID)
+		f.TargetSourceID, f.TargetRelPath = pl.SourceID, pl.RelPath
+		f.TargetSourceName = nil
+		if pl.SourceID != nil {
+			f.TargetSourceName = &pl.src.Name
+		}
+		if f.Status == StatusPendingReview || pl.Reason != "" {
+			f.StatusReason = nullable(pl.Reason)
+		}
+		f.MatchedArtistID, f.MatchedAlbumID = pl.ArtistID, pl.AlbumID
+	}
+	if f.TargetSourceID == nil || f.TargetRelPath == nil {
+		return
+	}
+	src, err := s.lib.GetSource(ctx, *f.TargetSourceID)
+	if err != nil {
+		return
+	}
+	f.TargetSourceName = &src.Name
+	if src.Type == library.SourceNFS {
+		if src.NFSServer != nil && src.NFSExport != nil {
+			full := *src.NFSServer + ":" + strings.TrimRight(*src.NFSExport, "/") + "/" + *f.TargetRelPath
+			f.TargetStoragePath = &full
+		}
+	} else if root, err := s.roots.Root(src); err == nil {
+		full := filepath.Join(root, filepath.FromSlash(*f.TargetRelPath))
+		f.TargetStoragePath = &full
+	}
+}
+
 // pickSource — хранилище: выбранное админом → по умолчанию → единственное принимающее загрузки.
 func (s *PlacementPlanner) pickSource(ctx context.Context, chosen *uuid.UUID) (library.Source, string) {
 	id := chosen