Check off T23 after two codex rounds

plans/omarchycn.md

@@ -55,7 +55,7 @@ These replace the 2026-10-05 decisions where they disagree.
 - [x] T20 Merge #14433 (input methods) and remove Rime: packages, `install/user/region.sh`, the Rime steps in `install/config/region.sh` and `omarchy-region`
 - [x] T21 Split language from region: `omarchy-language en|zh` and Setup > Language own `LANG`; `omarchy-region` and `install/config/region.sh` stop touching the locale
 - [x] T22 omarchy-pkgs: revert the `rime-ice-installer` package
-- [ ] T23 omarchy-iso: merge upstream `quattro` (#237) and #241; remove `--region`, `prepare-region.sh`, the region skel, the region preselected timezone, Rime bundling and its pin
+- [x] T23 omarchy-iso: merge upstream `quattro` (#237) and #241; remove `--region`, `prepare-region.sh`, the region skel, the region preselected timezone, Rime bundling and its pin
 - [ ] 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`
 - [ ] T25 Docs: `AGENTS.md`, `docs/regions.md`, `manual/52-china.md`, omarchy-iso README
 - [ ] T26 Build the local-source ISO and test in QEMU: Chinese + `Asia/Shanghai`, English + `Europe/Berlin`, runtime region and language switches