Progress with before/after, T4 evidence (supportsImmutableAssets has no effect under self-hosted standalone) in BLOCKED.md, device checklist, changelog, board row to 待验收. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N4f2nya58RoRu4yEmJgRGE