Adds a 'Download' action to the get-modal that closes it and opens a new universal
Download modal (VideoDownload.open) shared by movies, shows and YouTube:
- Quality TARGET shown as chips, read live from the profile you configured
(cutoff / codec / HDR / rejects / size for p2p; resolution/codec/container/
60fps/HDR for YouTube).
- Owned copies get a REAL verdict: 'In your library · 720p · BluRay · X265' +
a 'Meets your target' / 'Eligible for upgrade' badge with reasons, via
/downloads/evaluate (the quality_eval seam).
- Per-source rows (soulseek/torrent/usenet from the download config, or yt-dlp
for YouTube) each with a Search button + a 'Search all'.
Per the ask, the searches are STUBS — clicking flips the row to 'coming soon'; no
backend yet (that's the engine phase). Beautiful .vdl-* styling mirrors the get-modal
vibe (per-title hue glow). New JS file wired into index.html. Pure front-end.
