CLI: Copy Earlier Responses and Choose When Compaction Starts

This release adds /copy N and /copy last N, so you can copy an earlier response or the last few messages, and lets you choose the context usage at which automatic compaction starts. It also shows each sub-agent's task in the agent monitor, moves the /model search, sort, and edit controls to Up, keeps a V2 agent's allow rules from widening when it is upgraded to V3, reloads a stalled workflow session after an agent restart, and fixes headless, resume, /memories, /goal, voice, clipboard, session, and search display issues.