The executor passed only the text `input` to majordomo's agent.Run, silently
dropping inv.Images — so a multimodal run (vision: chatbot @mention, chat API)
lost its images on the executus path. majordomo's Run input arg is text-only, so
fold the images into the first user message (text + image parts) via WithHistory
and call Run with empty input, mirroring mort agentexec's multimodal seeding. The
image-less path is unchanged (prompt passes straight through).
Tests: a run with Images carries the image bytes + prompt into the first model
request; the text-only path still reaches the model.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
