* fix: sync worktree completion artifacts back to external state before merge (#1412)
When a worktree's .gsd/ was a real directory (not symlinked to external
state), milestone completion artifacts (SUMMARY, VALIDATION, updated
ROADMAP) were written locally but never synced back. The project root's
deriveState() read from external state and found no SUMMARY — reporting
the milestone as incomplete.
Changes:
- auto-worktree.ts: Added syncWorktreeStateBack() that copies milestone
and slice .md files from worktree .gsd/ to the main external state dir
- auto.ts: Call syncWorktreeStateBack() in tryMergeMilestone before the
git merge, ensuring artifacts are visible from the project root
Fixes#1412
* fix: emit agent_end after abort during tool execution (#1414)
When a user aborts a turn while a tool call is running, the abort RPC
succeeds but agent_end was never emitted. RPC consumers tracking turn
lifecycle via events got stuck in a 'streaming' state permanently.
Fix: After abort() + waitForIdle(), emit a synthetic agent_end if the
agent is no longer streaming. This ensures consumers always see the
turn-complete signal regardless of how the turn ended.
Fixes#1414
f0fe4b2443