Add T19-T27: timezone region, dhh's input methods, language split

plans/omarchycn.md

@@ -11,6 +11,16 @@ Progress source of truth for the `omarchycn` branches of `omarchy`, `omarchy-iso
 - China to Global: switch sources and language, keep CJK fonts and the input method, remove the Claude Code third-party provider entry and the env it wrote, hide the China software entry. Dim and Kimi stay for every region.
 - Deferred provisioning and factory reset get the region's system setup but no offline input method (deferred).
 
+## Decisions (owner and maintainers, 2026-10-08)
+
+These replace the 2026-10-05 decisions where they disagree.
+
+- Region and language are separate. Region comes from the timezone the user picks (omarchy #13690, omarchy-iso #241); the installer adds no region screen. Language is the first installer screen.
+- The `.cn` pacman mirrors are #13690's `mirrorlist-<channel>.prepend` files. Our `servers.sed` twins and the USTC Arch fallback go; `[omarchy]` keeps only `pkgs.omarchy.org`, as in #13690.
+- Input methods come from dhh's #14433 and omarchy-iso #237. Rime, `rime-ice-installer` and its bundled assets go.
+- The language picker offers English and Simplified Chinese. Chinese reruns the installer in cage + foot with fonts unpacked from the offline repository's `noto-fonts-cjk`; the target gets `LANG=zh_CN.UTF-8`.
+- Setup > Region switches mirrors, developer mirrors, the China apps entry and the Claude Code API entry. Setup > Language switches `LANG` and the Chinese UI. Neither touches the other.
+
 ## Shipping prerequisites
 
 - The region screen, Rime bundling and local `rime-ice-installer` build exist only on the `omarchycn` branches: a China-ready ISO is built by running `./bin/omarchy-iso-make --local-source ../omarchy ../omarchy-pkgs` from `omarchy-iso/` until they are merged and published.
@@ -41,6 +51,16 @@ Progress source of truth for the `omarchycn` branches of `omarchy`, `omarchy-iso
 - [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
+- [ ] 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
+- [ ] T23 omarchy-iso: merge upstream `quattro` (#237) and #241; remove the region screen, `--region`, `prepare-region.sh`, the region skel, Rime bundling and its pin
+- [ ] T24 omarchy-iso: language screen first; 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
+- [ ] T27 Acceptance checklist for T19–T26
+
 ## Acceptance checklist
 
 Evidence comes from the T12 runs of `omarchy-iso/release/omarchy-2026.10.06-x86_64-local.iso` in QEMU (omarchy 4e323342, omarchy-iso 8d069b0, omarchy-pkgs a84ad64c).