social.twinkl.theme.pack

The user's active look AND the unit of theme sharing (one per user, key=self). Holds the base theme, tokens, custom CSS, effects, and asset blobs (backgrounds/fonts) — which are kept live by this record's structural blob references. Listed in the public gallery by setting `gallery` to the Twinkl gallery DID (the publish property); discovered via constellation backlinks on `.gallery`. "Stealing" copies another user's pack into the applier's own self pack (copy-on-apply) — there is no live cross-repo reference, so a theme author can never retro-push CSS onto wearers. Custom CSS is sanitized + scoped server-side before it is ever rendered.