Post-merge hardening of the session-to-worktree move (#2998), driven by
review findings on the follow-up pass:
- an ambiguous transport failure (relay abort, timeout) on the
change-carrying move no longer force-deletes the fresh worktree that
may hold the user's only copy of their changes; both intent kinds
surface honest guidance and refresh both directories
- assertSdkSuccess re-tags ambiguous transport errors when wrapping SDK
failures, so ambiguity classification survives the wrapper on every
path, matching the prompt-send precedent
- session liveness checks scan all child stores plus the global status
index, and report unknown (not idle) when no store covers the session
— an evicted background directory can no longer make a busy session
look movable
- incomplete-rollback errors carry the changes-may-be-in-destination
guidance instead of swallowing it
- move-message assembly shared across the three call sites; tests now
exercise the real ambiguity classifier (extracted to
send-failure-classification.ts) instead of a hand-mirrored mock
- i18n fallout from the merge train: Turkish gains the 21 worktree-move
keys, all 12 locales get the hedged ambiguous-failure toast; owning
DOCUMENTATION.md files record the new contracts