fix(recommendation): use type conversion for fallback rows (staticcheck S1016)

golangci-lint v2 (CI-only; local is v1) flagged the field-by-field struct
literals — the fallback and you-might-like row types are identical, so convert
directly instead.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

internal/recommendation/home.go

@@ -228,9 +228,7 @@ func topUpYouMightLikeArtists(
 		if _, dup := excluded[r.Artist.ID]; dup {
 			continue
 		}
-		result = append(result, dbq.ListYouMightLikeArtistsForUserRow{
+		result = append(result, dbq.ListYouMightLikeArtistsForUserRow(r))
-			Artist: r.Artist, CoverAlbumID: r.CoverAlbumID, AlbumCount: r.AlbumCount,
-		})
 		if len(result) >= HomeYouMightLikeLimit {
 			break
 		}
@@ -261,9 +259,7 @@ func topUpYouMightLikeAlbums(
 		if _, dup := excluded[r.Album.ID]; dup {
 			continue
 		}
-		result = append(result, dbq.ListYouMightLikeAlbumsForUserRow{
+		result = append(result, dbq.ListYouMightLikeAlbumsForUserRow(r))
-			Album: r.Album, ArtistName: r.ArtistName,
-		})
 		if len(result) >= HomeYouMightLikeLimit {
 			break
 		}