🔧 chore(scripts): unify single-dash options

SKILLS.md

@@ -67,7 +67,7 @@ sh scripts/install_codex_skills.sh style-cleanup code-review-workflow
 
 ```bash
 # 安装到当前目录的 .codex/skills/
-sh scripts/install_codex_skills.sh --local
+sh scripts/install_codex_skills.sh -local
 
 # 或手动指定 CODEX_HOME
 CODEX_HOME="$(pwd)/.codex" sh scripts/install_codex_skills.sh
@@ -80,7 +80,7 @@ powershell -File scripts/install_codex_skills.ps1 -Local
 ```
 
 ```bat
-scripts\install_codex_skills.bat --local
+scripts\install_codex_skills.bat -local
 ```
 
 > 注意：Codex 只会从 `CODEX_HOME` 加载 skills；使用本地安装时，启动 Codex 需设置同样的 `CODEX_HOME`。