Asked to link to a session, the agent had no way to know the @session
reference syntax exists — every mention in the tool schema described
consuming a link the user dropped, never writing one — so it answered
with the title and timestamp as prose and the desktop had nothing to
render.
Every result now carries a ready-to-copy `link`, and the schema says to
write it inline instead of restating the title around it. The profile
segment is omitted when the active profile can't be named confidently;
a bare id still resolves.
Also skip linkifying a ref a model already wrapped in a markdown link,
which would otherwise rewrite into a nested link.
Assistant text goes through the markdown renderer, not DirectiveContent,
so a session reference an agent wrote came out as literal text. Rewrite
bare refs into `#session/<value>` links during markdown preprocessing and
dispatch that href to the shared chip in MarkdownLink, alongside the
existing media and preview hrefs.
Preprocessing already skips code fences and inline code, so a ref being
discussed in code stays literal. The pure parsing/href helpers move to
session-refs.ts to keep the resolver's React and API imports out of the
per-flush preprocess path.
