Recap: avoid duplicate summaries when nothing has changed

Currently, Claude Code shows recap summaries at the end of responses. When the user is in a conversation where nothing changes between turns (e.g., asking questions, reading output), identical recaps accumulate — sometimes 10+ in a row with the exact same content.

Suggested improvement: skip the recap if the session state hasn't changed since the last recap was shown, or add a deduplication check before rendering it.

A /config toggle to disable recaps entirely exists, but it's all-or-nothing. A smarter suppression would preserve the value of recaps without the noise.