Polish toward NIP-71 parity + better native discovery. Hashtags now flow through
the video data layer (the input UI in the upload/edit modals is the remaining
step):
- videoPayloadBuilder: sanitizeVideoHashtags (normalize/dedupe, drop reserved
"video"); persists hashtags in 30078 content AND emits ["t", tag] so bitvid's
own feed scoring (exploreScoring/kidsScoring already read t tags) and relay
queries pick them up.
- convertEventToVideo: exposes video.hashtags from content → the NIP-71 mirror
builder already carries them as t tags, so a shared video is categorized on
other apps too.
tests/video-hashtags.test.mjs: sanitize rules, content+t-tag emission, round-trip
to video.hashtags, empty case. Mutation-verified (t-tag emission load-bearing).
Co-Authored-By: Claude Opus 4.8 <[email protected]>
