支持appimage,添加安装脚本，更新文档

resources/linux/install.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+set -e
+
+APP_NAME="weflow"
+APP_EXEC="weflow"
+OPT_DIR="/opt/$APP_NAME"
+BIN_LINK="/usr/bin/$APP_NAME"
+DESKTOP_DIR="/usr/share/applications"
+ICON_DIR="/usr/share/pixmaps"
+
+if [ "$EUID" -ne 0 ]; then
+  echo "❌ 请使用 root 权限运行此脚本 (例如: sudo ./install.sh)"
+  exit 1
+fi
+
+echo "🚀 开始安装 $APP_NAME..."
+
+echo "📦 正在复制文件到 $OPT_DIR..."
+rm -rf "$OPT_DIR"
+mkdir -p "$OPT_DIR"
+cp -r ./* "$OPT_DIR/"
+chmod -R 755 "$OPT_DIR"
+chmod +x "$OPT_DIR/$APP_EXEC"
+
+echo "🔗 正在创建软链接 $BIN_LINK..."
+ln -sf "$OPT_DIR/$APP_EXEC" "$BIN_LINK"
+
+echo "📝 正在创建桌面快捷方式..."
+cat <<EOF >"$DESKTOP_DIR/${APP_NAME}.desktop"
+[Desktop Entry]
+Name=WeFlow
+Exec=$OPT_DIR/$APP_EXEC %U
+Terminal=false
+Type=Application
+Icon=$APP_NAME
+StartupWMClass=WeFlow
+Comment=A local WeChat database decryption and analysis tool
+Categories=Utility;
+EOF
+chmod 644 "$DESKTOP_DIR/${APP_NAME}.desktop"
+
+echo "🖼️ 正在安装图标..."
+if [ -f "$OPT_DIR/resources/icon.png" ]; then
+  cp "$OPT_DIR/resources/icon.png" "$ICON_DIR/${APP_NAME}.png"
+  chmod 644 "$ICON_DIR/${APP_NAME}.png"
+elif [ -f "$OPT_DIR/icon.png" ]; then
+  cp "$OPT_DIR/icon.png" "$ICON_DIR/${APP_NAME}.png"
+  chmod 644 "$ICON_DIR/${APP_NAME}.png"
+else
+  echo "⚠️ 警告: 未找到图标文件，跳过图标安装。"
+fi
+
+if command -v update-desktop-database >/dev/null 2>&1; then
+  echo "🔄 更新桌面数据库..."
+  update-desktop-database "$DESKTOP_DIR"
+fi
+
+echo "✅ 安装完成！你现在可以在应用菜单中找到 WeFlow，或者在终端输入 'weflow' 启动。"