The /watch/{token} SPA gets a third branch: media_kind==='file' renders an
info card (name / TYPE · size) + a Download button, no player. The <video>/
<audio> branches now guard on media_kind!=='file' so legacy links
(media_kind null) still play. Download is gated on the link's allow_download,
mirroring the media branch; the backend serves a file force-download
(attachment + octet-stream) regardless, so the gate only reflects owner ACL.
FE-only (public_meta already emits media_kind/size_bytes/container since S5a).
i18n HU/EN/DE 'file' fallback label. Two DOM tests: file -> info card +
Download, no player; view-only file -> no Download.