Yichen Jiang c58cc23d45 fix(web): address a session's own services from the host ...

A preset publishes its services behind `isolate` realms, which is what
makes them per session — and what makes them invisible to every host
context. The api-proxy kept reading the root realm, so requests that are
ABOUT a session but arrive from outside it answered for a singleton that
no longer exists: `goal.pause`/`clear` and `skill.list` returned "this
deployment does not mount @deepseek-ai/dsh-goal / dsh-skill" for sessions
whose composition mounts exactly that. Verified against a running host
before and after.

`agentPresets.serviceFor(agent, name)` addresses the instance instead,
reading the same subtree-ownership relation `leakedServices` already
uses, inverted. It is read addressing for a caller holding the agent: a
host row that `inject`s a service cannot use it, because injection
resolves before any session exists — which is why `tools` and
`subagents` stay host-plane and this is not a way around that.

Tool presenters had the same shape and the same cure: `viewFor` looked
definitions up without a scope while the global layer is empty by
design, so every card degraded to the generic renderer. It now takes the
owning agent.

Cold resume through `agentFor()` mounted no preset at all, so every
generic entry point — prompt, models, commands — rebuilt a restarted
session on host tools and the deployment persona. It composes the
recorded preset now, as the other resume path already did.

2026-08-07 00:35:30 +08:00

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