Foundation for declaring more than one web seed per video so the WebTorrent
swarm can pull pieces from an independent backup origin when the primary CDN
is overloaded — multiple `ws=` params are the standard BEP19 carrier and the
playback path already attaches every webseed it finds in the magnet.
- magnetShared: add extractAllWebSeeds(), which returns every `ws=` URL
(deduped, in order) instead of only the first like extractMagnetHints —
so a magnet with several webseeds can be round-tripped without dropping the
extras.
- videoNotePayload: normalizeWebSeedList() accepts the ws field as an array OR
a newline/comma-delimited string and feeds the full, deduped set into the
magnet (plus the hosted CDN url, as before). A single ws string still works
unchanged; the content `ws` field still reflects the primary seed.
Upload/Edit UI to author and manage the list lands in slices 2 and 3.
Mutation-verified (array-drop, split-drop, first-only, dedupe-loss all fail
the new tests); build + full unit suite green.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
