feat: v1.1 portable architecture (app/data separation)

New directory structure:
- app/core/ = OpenClaw program
- app/runtime/ = Node.js
- data/ = user config, memory, backups (never overwritten on upgrade)
- system/ = migration scripts

Features:
- Auto port detection (18789-18799)
- macOS Gatekeeper auto-fix (xattr quarantine removal)
- Windows UTF-8 BOM + CRLF encoding
- Config auto-migration on startup
- Platform-specific packages (Mac ARM64 + Windows x64)

portable/start.bat

@@ -0,0 +1,102 @@
+@echo off
+chcp 65001 >/dev/null 2>&1
+title U-Claw - Portable AI Agent
+
+echo.
+echo   ========================================
+echo     U-Claw v1.1 - Portable AI Agent
+echo   ========================================
+echo.
+
+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 "NPM_BIN=%NODE_DIR%\npm.cmd"
+
+set "OPENCLAW_HOME=%DATA_DIR%"
+set "OPENCLAW_STATE_DIR=%DATA_DIR%"
+set "OPENCLAW_CONFIG_PATH=%DATA_DIR%\config.json"
+
+REM Check runtime
+if not exist "%NODE_BIN%" (
+    echo   [ERROR] Node.js runtime not found
+    echo   Please ensure app\runtime\node-win-x64 is complete
+    pause
+    exit /b 1
+)
+
+for /f "tokens=*" %%v in ('"%NODE_BIN%" --version') do set NODE_VER=%%v
+echo   Node.js: %NODE_VER%
+echo.
+
+set "PATH=%NODE_DIR%;%NODE_DIR%\node_modules\.bin;%PATH%"
+
+REM Init data
+if not exist "%DATA_DIR%" mkdir "%DATA_DIR%"
+if not exist "%DATA_DIR%\memory" mkdir "%DATA_DIR%\memory"
+if not exist "%DATA_DIR%\backups" mkdir "%DATA_DIR%\backups"
+
+REM Default config
+if not exist "%DATA_DIR%\config.json" (
+    echo   First run - creating default config...
+    echo {"gateway":{"mode":"local","auth":{"token":"uclaw"}}} > "%DATA_DIR%\config.json"
+    echo   Config created
+    echo.
+)
+
+REM Check dependencies
+if not exist "%CORE_DIR%\node_modules" (
+    echo   First run - installing dependencies...
+    echo   Using China mirror, please wait...
+    echo.
+    cd /d "%CORE_DIR%"
+    call "%NPM_BIN%" install --registry=https://registry.npmmirror.com
+    echo.
+    echo   Dependencies installed!
+    echo.
+)
+
+if not exist "%CORE_DIR%\dist" (
+    echo   First run - building...
+    cd /d "%CORE_DIR%"
+    call "%NPM_BIN%" run build
+    echo.
+)
+
+REM Find available port
+set PORT=18789
+:check_port
+netstat -an | findstr ":%PORT% " | findstr "LISTENING" >/dev/null 2>&1
+if %errorlevel%==0 (
+    echo   Port %PORT% in use, trying next...
+    set /a PORT+=1
+    if %PORT% gtr 18799 (
+        echo   No available port 18789-18799
+        pause
+        exit /b 1
+    )
+    goto :check_port
+)
+
+echo   Starting OpenClaw on port %PORT%...
+echo   DO NOT close this window!
+echo.
+echo   ----------------------------------------
+echo   Browser will open automatically.
+echo   First time setup in web console:
+echo     1. Choose AI model (DeepSeek / Kimi / Qwen)
+echo     2. Enter API Key
+echo     3. Connect chat platform (QQ / Feishu / DingTalk)
+echo   ----------------------------------------
+echo.
+
+cd /d "%CORE_DIR%"
+start "" http://127.0.0.1:%PORT%/#token=uclaw
+"%NODE_BIN%" openclaw.mjs gateway run --allow-unconfigured --force --port %PORT%
+
+echo.
+echo   OpenClaw stopped.
+pause