Operator and live (/api/streamer/*)

GET  /api/streamer/signal?handle=      public · the active overlay SIGNAL
                                       → { marketId, name, yesPct, streamerId, slug, updatedAt,
                                           annotation?, closesAt? } | { marketId: null }
POST /api/streamer/signal              session or dk_ · { marketId, name, yesPct?, slug?, annotation?, closesAt? }
DELETE /api/streamer/signal            clears the caller's own overlay

GET  /api/streamers/live               public · { live: [{ handle, hlsUrl, viewers, signal: { marketId, name } | null }], recent }
GET  /api/streamer/receipts?handle=    public · session receipts incl. END CARD recap
POST /api/live/[handle]/clip           session · MARK ▸ 30 s (Mux; cooldown 120 s, 10/day)
POST /api/streamer/stream              Privy JWT · provision Mux ingest (approved operators)
… analytics · heartbeat · recap · register · me · profile · stream/state

The OBS browser source is https://denpa.ai/overlay/[handle]. The public viewer page is https://denpa.ai/live/[handle] (chat, moderation, MARK / REPLAY, CO-SIGN / FADE).