Check off T19 after two codex rounds

plans/omarchycn.md

@@ -51,7 +51,7 @@ These replace the 2026-10-05 decisions where they disagree.
 - [x] T17 The desktop shell reads in Chinese under `zh_CN` (owner report): notifications, the bar panels (agents, network, display and the rest), the menu's search prompt — review cap reached: five codex rounds; the round-5 findings (user text translated at display, custom reminder list lines, reminder tooltips and errors) are fixed by wording every notification at its sender and verified by tests and in the China VM, without a sixth review
 - [x] T18 Merge the official region-profile PRs (omarchy #13690, #14399; omarchy-iso #206, #236) and align to them: region code `cn` in `/etc/omarchy/region`, China files under `default/regions/cn/`, pacman rendered by `omarchy-apply-pacman` (`.cn` twins first, USTC fallback, ArchLinuxCN with its keyring), offline timezone `Asia/Shanghai`; the ISO keeps the first-screen region choice and bundles the China profile, `--region cn` preselects China
 
-- [ ] T19 Merge the reworked #13690 (timezone-derived region) and align: `mirrorlist-<channel>.prepend` and `timezones` replace `servers.sed`, `mirrorlist.append` and `timezone`; drop #14399's timezone preselection (closed upstream); `install/config/region.sh` reads `/etc/omarchy/region` instead of `OMARCHY_REGION`; drop the dead `china` rename migration
+- [x] T19 Merge the reworked #13690 (timezone-derived region) and align: `mirrorlist-<channel>.prepend` and `timezones` replace `servers.sed`, `mirrorlist.append` and `timezone`; drop #14399's timezone preselection (closed upstream); `install/config/region.sh` reads `/etc/omarchy/region` instead of `OMARCHY_REGION`; drop the dead `china` rename migration
 - [ ] T20 Merge #14433 (input methods) and remove Rime: packages, `install/user/region.sh`, the Rime steps in `install/config/region.sh` and `omarchy-region`
 - [ ] 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
 - [ ] T22 omarchy-pkgs: revert the `rime-ice-installer` package