PulseCoreLite v1.8.8

• 提醒高级设置重构：完善背景配置与频率选择，支持图片上传/预览并更新布局

• 提醒管理体验增强：列表与编辑布局优化，补充未命名标题生成与交互细节

• 提醒逻辑完善：基于可见性启动倒计时，简化关闭信号监听并增强清理流程

• 状态管理抽离：提醒页签与背景类型同步整理为 composable

• 任务栏右键菜单新增“退出应用”

• 偏好持久化优化：悬浮窗/任务栏偏好改为防抖写入

• Tauri 调试增强：新增调试日志与运行时回调保护

• 开发体验改进：dev-runner 端口扫描逻辑与默认步骤优化

• Refactor reminder advanced settings with improved background config, frequency selection, and image upload/preview

• Enhance reminder management UX with list/edit layout updates plus untitled title generation

• Improve reminder logic: start countdown based on visibility, simplify close listeners, and strengthen cleanup

• Extract reminder tab/background sync into composables for clearer state management

• Add "Exit App" to the taskbar context menu

• Debounce overlay/taskbar preference persistence to reduce frequent writes

• Add Tauri debug logging and runtime callback guards

• Improve dev-runner port scanning and default steps