Check off T18 after three codex rounds

plans/omarchycn.md

@@ -39,7 +39,7 @@ Progress source of truth for the `omarchycn` branches of `omarchy`, `omarchy-iso
 - [x] T15 Global to China fails on local-source installs (owner report): `rime-ice-installer` lives only in the ISO's offline mirror, so a Global install cannot fetch it later; local-source installs install every pinned local build, and `install/config/region.sh` installs the China packages before it writes any region state
 - [x] T16 A region switch offers to log out at once, since the language and the developer mirrors only reach a new session (owner request)
 - [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
-- [ ] 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
+- [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
 
 ## Acceptance checklist