fix: Windows encoding (UTF-8 BOM + CRLF) and macOS Gatekeeper

- Windows bat files: UTF-8 BOM + CRLF + English text to avoid garbled Chinese in cmd.exe
- macOS scripts: xattr -rd com.apple.quarantine to fix "unverified developer" popup
- New install scripts: Mac-安装并启动.command, Windows-安装并启动.bat
  (extract tar.gz to local disk then launch)

uclaw-scripts/Mac-安装并启动.command

@@ -0,0 +1,86 @@
+#!/bin/bash
+# ============================================================
+# U-Claw 虾盘 - macOS 一键安装并启动
+# 从 U 盘解压到电脑，然后启动 OpenClaw
+# ============================================================
+
+GREEN='\033[0;32m'
+CYAN='\033[0;36m'
+RED='\033[0;31m'
+YELLOW='\033[1;33m'
+NC='\033[0m'
+
+clear
+echo ""
+echo -e "${CYAN}"
+echo "  ╔══════════════════════════════════════╗"
+echo "  ║     U-Claw 虾盘 v1.1                ║"
+echo "  ║     一键安装并启动 (macOS)           ║"
+echo "  ╚══════════════════════════════════════╝"
+echo -e "${NC}"
+
+USB_DIR="$(cd "$(dirname "$0")" && pwd)"
+ARCHIVE="$USB_DIR/U-Claw.tar.gz"
+INSTALL_DIR="$HOME/U-Claw"
+
+# 移除 macOS 隔离标记（解决"无法验证开发者"弹窗）
+xattr -rd com.apple.quarantine "$USB_DIR" 2>/dev/null || true
+
+# 检查压缩包
+if [ ! -f "$ARCHIVE" ]; then
+    echo -e "  ${RED}错误: 找不到 U-Claw.tar.gz${NC}"
+    echo "  请确保此脚本和压缩包在同一目录"
+    read -p "  按回车键退出..."
+    exit 1
+fi
+
+# 检查是否已安装
+if [ -d "$INSTALL_DIR/openclaw/node_modules" ]; then
+    echo -e "  ${GREEN}检测到已安装的 U-Claw${NC}"
+    echo "  位置: $INSTALL_DIR"
+    echo ""
+    echo -e "  ${YELLOW}[1] 直接启动（跳过解压）${NC}"
+    echo "  [2] 重新安装（覆盖现有）"
+    echo ""
+    read -p "  请选择 [1/2，默认1]: " choice
+    choice="${choice:-1}"
+    if [ "$choice" = "2" ]; then
+        echo ""
+        echo -e "  ${YELLOW}正在重新安装...${NC}"
+        rm -rf "$INSTALL_DIR"
+    else
+        echo ""
+        echo -e "  ${CYAN}跳过解压，直接启动...${NC}"
+    fi
+fi
+
+# 解压（如果需要）
+if [ ! -d "$INSTALL_DIR/openclaw/node_modules" ]; then
+    echo ""
+    echo -e "  ${CYAN}正在解压 U-Claw 到 $INSTALL_DIR ...${NC}"
+    echo "  这可能需要 30-60 秒，请稍等..."
+    echo ""
+
+    mkdir -p "$HOME"
+    cd "$HOME"
+    tar xzf "$ARCHIVE"
+
+    if [ $? -ne 0 ]; then
+        echo -e "  ${RED}解压失败！${NC}"
+        read -p "  按回车键退出..."
+        exit 1
+    fi
+
+    echo -e "  ${GREEN}解压完成！${NC}"
+    echo ""
+fi
+
+# 删除 Windows 相关文件（可选，不影响运行）
+# rm -f "$INSTALL_DIR"/Windows-*.bat 2>/dev/null
+
+# 启动 OpenClaw
+echo -e "  ${CYAN}正在启动 OpenClaw...${NC}"
+echo ""
+
+cd "$INSTALL_DIR"
+exec bash "$INSTALL_DIR/Mac-从U盘启动.command"