feat(portable): 交互式 CLI 启动器 + 3 个办公技能（采纳自 PR #36）

基于最新 main 重做 PR #36（fanjiazhen）中有价值的部分：
- OpenClaw-CLI.bat / Mac-OpenClaw-CLI.command：进阶用户双击打开一个配好
  便携环境（盘内 Node + 盘内数据 + .bin 入 PATH）的命令行，可直接敲
  openclaw 命令（chat/configure/doctor/gateway status 等）。
- skills-cn/ 新增 word-writer / excel-helper / ppt-designer 三个办公文本
  技能，与现有 10 个本地化技能（小红书/知乎等）互补，frontmatter 格式一致。

未采纳 PR #36 的其余部分：HTML 品牌改动、skill_zip 二进制、删充值.html。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

portable/OpenClaw-CLI.bat

@@ -0,0 +1,53 @@
+@echo off
+chcp 65001 >nul 2>&1
+title U-Claw Interactive CLI
+
+REM 进阶用户：打开一个已配置好环境变量的命令行，可直接敲 openclaw 命令。
+REM 复用与 Windows-Start.bat 一致的便携环境（盘内 Node + 盘内数据）。
+
+set "UCLAW_DIR=%~dp0"
+set "APP_DIR=%UCLAW_DIR%app"
+set "CORE_DIR=%APP_DIR%\core"
+set "DATA_DIR=%UCLAW_DIR%data"
+set "NODE_DIR=%APP_DIR%\runtime\node-win-x64"
+set "NODE_BIN=%NODE_DIR%\node.exe"
+
+set "OPENCLAW_HOME=%DATA_DIR%"
+set "OPENCLAW_STATE_DIR=%DATA_DIR%\.openclaw"
+set "OPENCLAW_CONFIG_PATH=%DATA_DIR%\.openclaw\openclaw.json"
+set "OPENCLAW_DISABLE_BONJOUR=1"
+
+REM 把盘内 node 和 .bin 放到 PATH 最前，让 openclaw 命令可直接调用
+set "PATH=%NODE_DIR%;%CORE_DIR%\node_modules\.bin;%PATH%"
+
+if not exist "%NODE_BIN%" (
+    echo   [ERROR] Node.js runtime not found
+    echo   Please run Windows-Start.bat once first to set up the runtime.
+    pause
+    exit /b 1
+)
+
+if not exist "%CORE_DIR%\node_modules\.bin\openclaw.cmd" (
+    echo   [ERROR] OpenClaw not installed yet
+    echo   Please run Windows-Start.bat once first.
+    pause
+    exit /b 1
+)
+
+echo.
+echo   ========================================
+echo     U-Claw Interactive CLI
+echo   ========================================
+echo.
+echo   You can now run the 'openclaw' command directly. Examples:
+echo     openclaw --help          Show all commands
+echo     openclaw chat            Open the terminal chat UI
+echo     openclaw configure       Interactive setup (models, channels)
+echo     openclaw doctor          Diagnose and repair
+echo     openclaw gateway status  Check the running gateway
+echo.
+echo   Type 'exit' to close this window.
+echo   ========================================
+echo.
+
+cmd /k