Fix China app installs and wire the CN AI stack into Install > AI

Offline installs ship no pacman sync db, so yay resolved official
repo dependencies as AUR packages and every catalog install failed;
omarchy-cn-app-install now runs a full -Syu first (verified end to
end: WeChat builds and installs in the VM). Kimi Code gains a real
installer command reused by the harness registry, the default-agent
path, and new Install > AI entries (Kimi Code, Deep Code, AI Hub),
and the AI Hub wizard offers to launch native harnesses immediately
so their official CLI login runs, matching how Claude Code works.

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

bin/omarchy-cn-ai-setup

@@ -40,7 +40,10 @@ proto=$(cn_ai_harness_field "$harness" protocol)
 if [[ $proto == "native" ]]; then
   omarchy-cn-ai-profile-create "$name" "$harness" "$provider" "$model"
   omarchy-cn-ai-profile-use "$name"
-  echo "$harness 自管鉴权：首次启动时按其官方流程登录/配置"
+  echo "$harness 自管鉴权：首次启动时在 CLI 内完成官方登录"
+  if gum confirm "立即启动并完成官方登录？"; then
+    exec omarchy-cn-ai-launch "$name"
+  fi
   echo "完成。启动: omarchycn ai launch"
   exit 0
 fi

bin/omarchy-cn-app-install

@@ -32,6 +32,11 @@ fi
 
 case "$source_type" in
 aur)
+  # Offline installs ship no sync db; yay then treats repo deps as AUR
+  if ! compgen -G "/var/lib/pacman/sync/*.db" > /dev/null; then
+    echo "首次安装：正在同步软件仓库并更新系统（pacman -Syu）……"
+    sudo pacman -Syu --noconfirm
+  fi
   omarchy-pkg-aur-add "$(jq -r '.package' <<<"$entry")"
   ;;
 webapp)

bin/omarchy-cn-kimi-install

@@ -0,0 +1,15 @@
+#!/bin/bash
+# omarchy:summary=Install Kimi Code with the official installer script
+# omarchy:examples=omarchycn kimi install
+
+set -euo pipefail
+
+if omarchy-cmd-present kimi; then
+  echo "Kimi Code 已安装"
+  exit 0
+fi
+
+installer=$(mktemp)
+trap 'rm -f "$installer"' EXIT
+curl -fsSL https://code.kimi.com/kimi-code/install.sh -o "$installer"
+bash "$installer"

bin/omarchy-default-agent

@@ -50,13 +50,10 @@ if [[ $agent == "kimi" ]]; then
     if [[ $installing == "false" ]]; then
       exec omarchy-launch-floating-terminal-with-presentation omarchy-default-agent --install kimi
     fi
-    installer=$(mktemp)
-    if ! curl -fsSL https://code.kimi.com/kimi-code/install.sh -o "$installer" || ! bash "$installer"; then
-      rm -f "$installer"
+    if ! omarchy-cn-kimi-install; then
       echo "Could not install $name with the official installer" >&2
       exit 1
     fi
-    rm -f "$installer"
   fi
 else
   if [[ $installing == "false" ]] && ! mise where "$agent_package" &>/dev/null; then