feat: fold an answered compact-on-return question into its compaction row

When Claude asks to compact a resumed session and the answer is to compact,
the question card is folded into the compaction row, which notes how long
the session had been idle.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
09a0912b05Julius Marminge committed on 10/24/2026, 4:17:46 AMparent2813df8

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