Drop in on an adopted host session whose model names no Claude family #642

Found while working #627.

User story

As the owner, I want Drop in on an adopted host session that runs a non-Claude model through an Anthropic-compatible endpoint, so that I can take it over like any adopted session.

Acceptance criteria

• An adopted host session whose transcript names no Claude family shows "Drop in to " on the Agents rail.
• A Claude session's Drop in rule does not change.

What I'd notice

Drop in on host sessions that run a non-Claude model.

Tasks

• Decide how eve learns the session is a Claude kind without a Claude alias in model (relay field or eve rule).

Context

barelyworkingcode/relay#588 open question 1 and #626 open question 2 accepted this gap. Eve sends no model on adopt. Relay launches with the transcript's family alias, else no --model. Eve shows Drop in only for a Claude alias in model (takesDropIn). On the devbox stack the model is not a Claude family, so the adopted host session listed model: "" and showed no Drop in button (barelyworkingcode/relay#590 real-app step 2). The drop-in door itself worked. Real Claude transcripts name claude-*, so real hosts get the button.

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