feat(ui): 美化启动界面并重构 /is 工具/插件展示

- 缩小标题加 ❯ 引导符、彩色版本号、中文说明
- 去除启动头部段落间空行
- /is 本地扩展和 npm 扩展合并为 [插件] 分组展示
- /is 新增 [工具] 区块显示所有注册工具及激活状态

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

sproutclaw.bat

@@ -1,15 +1,36 @@
 @echo off
 setlocal
-
 set "SCRIPT_DIR=%~dp0"
-if "%SCRIPT_DIR:~-1%"=="\" set "SCRIPT_DIR=%SCRIPT_DIR:~0,-1%"
-set "PI_CODING_AGENT_DIR=%SCRIPT_DIR%\.pi\agent"
-set "PI_CLI_DIST=%SCRIPT_DIR%\packages\coding-agent\dist\cli.js"
-
-if not exist "%PI_CLI_DIST%" (
-    echo Build output not found: %PI_CLI_DIST% >&2
-    echo Run from repo root: npm run build >&2
-    exit /b 1
+if "%SCRIPT_DIR:~-1%"=="" set "SCRIPT_DIR=%SCRIPT_DIR:~0,-1%"
+if not defined PI_CODING_AGENT_DIR (
+    set "PI_CODING_AGENT_DIR=%SCRIPT_DIR%.piagent"
 )
 
-node "%PI_CLI_DIST%" %*
+if "%~1"=="" goto run
+if /I "%~1"=="run" (
+    shift
+    goto run
+)
+if /I "%~1"=="build" (
+    shift
+    npm run build %*
+    exit /b %ERRORLEVEL%
+)
+if /I "%~1"=="help" goto help
+if "%~1"=="-h" goto help
+if "%~1"=="--help" goto help
+
+:run
+call "%SCRIPT_DIR%pi-built.bat" %*
+exit /b %ERRORLEVEL%
+
+:help
+echo sproutclaw - SproutClaw pi 构建版启动器
+echo.
+echo 用法:
+echo   sproutclaw              启动 pi（构建版）
+echo   sproutclaw run [args]   同 sproutclaw
+echo   sproutclaw build        从源码构建所有包
+echo.
+echo 其余参数透传给 pi，例如: sproutclaw --version
+exit /b 0