chore: 删除冲突文件

feat: 合并系统监控与飞书通知重写

feat: 添加系统资源监控功能及相关配置

chore: clean up duplicate retry prompt and trim debounce wording

fix: install.sh now writes health_retries/health_retry_delay to config.json

fix: add debounce/handshake retry for gateway health check

change: default command_timeout to 150s

feat: add notification timeout retry mechanism

fix: auto-detect PATH for systemd service to resolve openclaw command not found

feat: 增强安装脚本的健壮性

fix: 使用虚拟环境安装依赖，避免系统环境冲突

更新 install.sh

feat: OpenClaw Gateway 监控工具