analyze_floorplan_image and analyze_room_photo defer the vision work
to the host via MCP sampling (server.server.createMessage). Validates
host capability before calling, fetches URL inputs and base64-encodes
them, constrains output to a Zod schema, and returns structured
content. No vision model is bundled.
9 tests, all passing via a mocked sampling-capable client.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
