style: gofmt playlists.go after Refreshable field add (#411 R2)

The commented Refreshable field broke gofmt's struct-tag column
alignment in playlistRowView. Pure formatting.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

internal/api/playlists.go

@@ -38,11 +38,11 @@ type playlistRowView struct {
 	// which kinds support it (false for user + songs_like_artist).
 	Refreshable  bool    `json:"refreshable"`
 	SeedArtistID *string `json:"seed_artist_id,omitempty"`
-	CoverURL      string  `json:"cover_url,omitempty"`
-	TrackCount    int32   `json:"track_count"`
-	DurationSec   int32   `json:"duration_sec"`
-	CreatedAt     string  `json:"created_at"`
-	UpdatedAt     string  `json:"updated_at"`
+	CoverURL     string  `json:"cover_url,omitempty"`
+	TrackCount   int32   `json:"track_count"`
+	DurationSec  int32   `json:"duration_sec"`
+	CreatedAt    string  `json:"created_at"`
+	UpdatedAt    string  `json:"updated_at"`
 }
 
 // playlistTrackView is one row of a playlist's track list on the wire.