Worlds
Like a world
Increment a world’s public likes counter. Uses the read scope, so a publishable (pk_) browser key can drive a like button. No request body. The counter is best-effort and non-authoritative (no per-identity dedup yet). The underlying RPC is visibility-guarded — only public/unlisted/ featured worlds are likeable; liking a private or non-existent world is a silent no-op (still 204, no existence oracle).
POST
Like a world
Like a world

