Add the 10 new @tr labels (radio menu items, playlist Follow/Copy, MusicBrainz setting) plus the new toasts to all five locale catalogs (en/es/de/fr/pt); es is canonical Mexican, de/fr/pt machine-drafted and flagged for review. Convert the new user-facing toasts in enqueue_track_ids + the playlist-copy arm from raw strings to qbz_i18n::t / qbz_i18n::tf so they localize like the rest. cc