chore: add install.sh one-liner installer

install.sh

@@ -0,0 +1,59 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REPO="jackwener/wx-cli"
+BIN_NAME="wx"
+INSTALL_DIR="/usr/local/bin"
+
+# ── 检测平台 ────────────────────────────────────────────────
+OS=$(uname -s)
+ARCH=$(uname -m)
+
+case "${OS}-${ARCH}" in
+  Darwin-arm64)   ASSET="wx-macos-arm64" ;;
+  Darwin-x86_64)  ASSET="wx-macos-x86_64" ;;
+  Linux-x86_64)   ASSET="wx-linux-x86_64" ;;
+  Linux-aarch64)  ASSET="wx-linux-aarch64" ;;
+  *)
+    echo "不支持的平台: ${OS}-${ARCH}"
+    echo "请从 https://github.com/${REPO}/releases 手动下载"
+    exit 1
+    ;;
+esac
+
+# ── 获取最新版本号 ──────────────────────────────────────────
+echo "正在获取最新版本..."
+TAG=$(curl -fsSL "https://api.github.com/repos/${REPO}/releases/latest" \
+  | grep '"tag_name"' | head -1 | sed 's/.*"tag_name": *"\([^"]*\)".*/\1/')
+
+if [ -z "$TAG" ]; then
+  echo "获取版本失败，请检查网络或访问 https://github.com/${REPO}/releases"
+  exit 1
+fi
+
+echo "版本: ${TAG}  平台: ${ASSET}"
+
+# ── 下载 ────────────────────────────────────────────────────
+URL="https://github.com/${REPO}/releases/download/${TAG}/${ASSET}"
+TMP=$(mktemp)
+trap 'rm -f "$TMP"' EXIT
+
+echo "下载中: ${URL}"
+curl -fsSL --progress-bar -o "$TMP" "$URL"
+chmod +x "$TMP"
+
+# ── 安装 ────────────────────────────────────────────────────
+if [ -w "$INSTALL_DIR" ]; then
+  mv "$TMP" "${INSTALL_DIR}/${BIN_NAME}"
+else
+  echo "需要 sudo 权限安装到 ${INSTALL_DIR}"
+  sudo mv "$TMP" "${INSTALL_DIR}/${BIN_NAME}"
+fi
+
+echo ""
+echo "✓ wx 已安装到 ${INSTALL_DIR}/${BIN_NAME}"
+echo ""
+echo "快速开始："
+echo "  sudo wx init     # 首次初始化（需要微信正在运行）"
+echo "  wx sessions      # 查看最近会话"
+echo "  wx --help        # 查看所有命令"