Send available face animations by default and accept large=false for the small representation. Preserve the sticker business type when encoding animated faces.
Fixes#483
Encode poke message segments as private window shake messages while keeping the dedicated send_poke action unchanged.
Restrict window shakes to a single ordinary private-chat segment. Reject group, temporary-session, mixed-message, and forwarded usage before identity lookup, media upload, or packet transmission.
Add full outbound request coverage, OneBot action regressions, and live private-chat verification for issue #259.
Closes#259
Replace the open message bag with a validated discriminated union and preflight complete messages before uploads or sends. Return BAD_REQUEST for invalid or unsendable segments instead of dropping fields, sending partial content, or silently changing private messages.
DrSmoothl