refactor: remove duplicate notifySessionIdle from hook callback

All idle sources (CC hook, codex watcher, terminal streamer) already emit
timeline session.state events. The unified timeline listener handles
notifySessionIdle for all of them, so the hook-server-specific call was
redundant.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: IM.codes

src/daemon/lifecycle.ts

@@ -287,7 +287,7 @@ export async function startup(): Promise<DaemonContext> {
       const record = listSessions().find((s) => s.name === payload.session);
       const projectName = record?.projectName ?? payload.session;
       if (payload.event === 'idle') {
-        notifySessionIdle(payload.session);
+        // notifySessionIdle is handled by the unified timeline listener below
         serverLink.send({ type: 'session.idle', session: payload.session, project: projectName, agentType: payload.agentType });
       } else if (payload.event === 'notification') {
         serverLink.send({ type: 'session.notification', session: payload.session, project: projectName, title: payload.title, message: payload.message });