Chinese installer onboarding: bilingual setup form, vendored ISO patch

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QKxGW1raAWaqeU8WdHsMsp

AGENTS.md

@@ -19,6 +19,7 @@ This fork carries the OmarchyCN China-integration layer on top of upstream `base
 - `cn/` holds the data layer: `mirrors.json`, `dev-mirrors.json`, `apps.json`, `registry/` (AI providers/harnesses/compatibility), `fcitx5/`, `fontconfig/`, `keys/`, `lib/` (sourced helpers), `release` (cn release number)
 - cn migrations live in `cn/migrations/*.sh`, run by `omarchy-cn-update` with per-file completion markers under `~/.local/state/omarchycn/`
 - Packaging: `packages/omarchy-pkgs-cn.patch` must be applied to the sibling `omarchy-pkgs` checkout so `omarchy-dev` ships `cn/`; keyring in `packages/omarchycn-keyring/`
+- ISO: `packages/omarchy-iso-cn.patch` must be applied to the sibling `omarchy-iso` checkout — Chinese installer (cage+foot graphical console with English VT fallback) and live-env packages
 - Release process: `docs/release-checklist.md`; signing: `docs/release-signing.md`; pacman repo: `docs/pacman-repo.md`
 - Upstream sync: `.gitea/workflows/upstream-sync.yml` opens a PR per upstream change; keep upstream file edits minimal (currently: one `GROUP_DESCRIPTIONS[cn]` line in `bin/omarchy`, the OmarchyCN section in `default/omarchy/omarchy-menu.jsonc`, a rewritten `README.md` (known recurring sync conflict, resolve toward ours), `AGENTS.md` additions, and two `.gitignore` lines)
 - cn tests: `test/shell.d/omarchycn-test.sh`, `test/shell.d/omarchycn-ai-test.sh`