Bug

The "⚡ live" badge on comment threads appears whenever any reply has author === agentName, but it should only appear when the user explicitly used the "Send to Agent" button.

Reproduction

1. Configure agent_cmd in crit config
2. Use the plan hook flow — Claude replies to a comment via crit comment --reply-to <id> --author claude "..."
3. The comment thread shows the "⚡ live" badge even though "Send to Agent" was never used

Root cause

isLiveThread() in app.js (line ~4285) uses a broad heuristic:

function isLiveThread(comment) {
    if (!agentEnabled || !comment.replies) return false;
    return comment.replies.some(function(r) { return r.author === agentName; });
}

This matches ANY reply from the agent, including CLI replies from plan review (crit comment --reply-to --author claude). It should only match threads where "Send to Agent" was explicitly used.

Impact

• Threads incorrectly show as "live"
• Replies in "live" threads auto-forward to the agent (line ~5127), so typing a reply in a falsely-live thread would unexpectedly trigger an agent request

Suggested fix

Persist an agent_requested flag on the comment when POST /api/agent/request is called. Then isLiveThread checks comment.agent_requested instead of checking reply authors.