Check off T27 after two codex rounds

plans/omarchycn.md

@@ -57,7 +57,7 @@ These replace the 2026-10-05 decisions where they disagree.
 - [x] T24 omarchy-iso: the language screen replaces the region screen; Chinese reruns in cage + foot with `noto-fonts-cjk` unpacked from the offline repository (no font packages added to the ISO); the CJK console lists only US-keymap keyboards and preselects Chinese (Simplified, Pinyin); the target gets `zh_CN.UTF-8` through `locale_config`; the harness takes `--language zh`
 - [x] T25 Docs: `AGENTS.md`, `docs/regions.md`, `manual/52-china.md`, omarchy-iso README
 - [x] T26 Build the local-source ISO and test in QEMU: Chinese + `Asia/Shanghai`, English + `America/New_York`, runtime region and language switches
-- [ ] T27 Acceptance checklist for T19–T26
+- [x] T27 Acceptance checklist for T19–T26
 
 ## Acceptance checklist