One picture, one question, prose back. Point anything at:

Also POST /v1/chat/completions (OpenAI content parts, stream: true) and GET /v1/models. Images must be inlined as base64: this component has no outbound network, so a remote URL is refused rather than fetched. If the deployment config sets api_key, send it as Authorization: Bearer <key>. This playground needs no credential either way: it talks to this deployment's own open routes.