C2PA probe
POST /v1/c2pa-probe — no Redis writes
Original bytes preserved (no canvas)
Drop or choose image Calls the API once. Does not upload, verify, or touch deep-provenance / Redis.

API base: window.__KANONYX_API_BASE__ or http://localhost:3000. “AI image” without an embedded manifest still returns absent.

Same layout as the extension deep panel: summary, meta rows (Analysis / C2PA lifecycle / C2PA), signal line, then optional raw JSON.