cn commands: use omarchy-cmd helpers per bin style rule

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

bin/omarchy-cn-ai-default

@@ -30,7 +30,7 @@ codex) agent="codex" ;;
 esac
 
 command=$(cn_ai_harness_field "$harness" command)
-if ! command -v "$command" > /dev/null 2>&1; then
+if omarchy-cmd-missing "$command"; then
   install=$(cn_ai_harness_field "$harness" install)
   echo "Installing $harness: $install"
   $install

bin/omarchy-cn-ai-doctor

@@ -25,7 +25,7 @@ provider=$(cn_ai_profile_field "$profile" provider)
 command=$(cn_ai_harness_field "$harness" command)
 proto=$(cn_ai_harness_field "$harness" protocol)
 
-if command -v "$command" > /dev/null 2>&1; then
+if omarchy-cmd-present "$command"; then
   echo "PASS ai: harness $harness installed ($command)"
 else
   install=$(cn_ai_harness_field "$harness" install)

bin/omarchy-cn-ai-launch

@@ -20,7 +20,7 @@ model=$(cn_ai_profile_field "$profile" model)
 command=$(cn_ai_harness_field "$harness" command)
 config_method=$(cn_ai_harness_field "$harness" config_method)
 
-if ! command -v "$command" > /dev/null 2>&1; then
+if omarchy-cmd-missing "$command"; then
   install=$(cn_ai_harness_field "$harness" install)
   if [[ $install == doc:* ]]; then
     echo "$harness 未安装，安装方法见官方文档: ${install#doc:}" >&2

bin/omarchy-cn-ai-secret

@@ -17,11 +17,11 @@ FILE_DIR="$HOME/.local/state/omarchycn/secrets"
 FILE_PATH="$FILE_DIR/$provider"
 
 secret_service_ok() {
-  command -v secret-tool > /dev/null 2>&1 && secret-tool search service omarchycn > /dev/null 2>&1
+  omarchy-cmd-present secret-tool && secret-tool search service omarchycn > /dev/null 2>&1
 }
 
 pass_ok() {
-  command -v pass > /dev/null 2>&1 && pass ls > /dev/null 2>&1
+  omarchy-cmd-present pass && pass ls > /dev/null 2>&1
 }
 
 case "$action" in
@@ -87,7 +87,7 @@ rm)
     rm -f "$FILE_PATH"
     removed=1
   fi
-  if command -v secret-tool > /dev/null 2>&1 && ! secret_service_ok; then
+  if omarchy-cmd-present secret-tool && ! secret_service_ok; then
     echo "Secret Service 不可达，无法确认其中的副本已清除；服务恢复后重新执行 rm" >&2
     exit 1
   fi