8d2ffa108d
The CI runs `cargo doc --workspace --no-deps` with `RUSTDOCFLAGS=-Dwarnings`. Two doc-comment links broke the build: * `commands/session.rs::prune` referenced `[\`SessionManager::prune_sessions_older_than\`]` which rustdoc tries to resolve as an item in scope. Without importing `SessionManager` into the doc-comment scope, the link was unresolvable. Fix by qualifying with the full module path: `[\`crate::session_manager::SessionManager::…\`]`. * `config.rs::max_subagents` had a free-form `[subagents]` reference that rustdoc parsed as an intra-doc link. Wrap it in backticks so it renders as inline code instead. No code change. Pure rustdoc hygiene; CI gate passes again.