Add explicit PHASE:crashed case to _on_phase_change in phase-handler.sh:
logs crash, notifies Matrix, escalates to supervisor, restores backlog
label, preserves worktree if PR exists, cleans up temp files.
Add crashed case to dev-agent.sh post-loop case statement for
belt-and-suspenders cleanup matching the callback behavior.
Replaces the dead crash_recovery_failed case that was never triggered.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
7f9cefa847