IME: content-diff backup condition, DefaultIM assertion

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

bin/omarchy-cn-ime-apply

@@ -9,7 +9,7 @@ omarchy-pkg-add fcitx5-rime fcitx5-chinese-addons fcitx5-configtool
 profile_dir="$HOME/.config/fcitx5"
 mkdir -p "$profile_dir"
 
-if [[ -f $profile_dir/profile ]] && ! grep -q '^Name=rime$' "$profile_dir/profile"; then
+if [[ -f $profile_dir/profile ]] && ! cmp -s "$profile_dir/profile" "$OMARCHY_PATH/cn/fcitx5/profile"; then
   backup_dir="$HOME/.local/state/omarchycn/backups/ime/$(date +%Y%m%d-%H%M%S)"
   mkdir -p "$backup_dir"
   cp "$profile_dir/profile" "$backup_dir/profile"