Track daily expenses in structured markdown files organized by month. Use when the user wants to log spending, view expense summaries, analyze spending patterns, or manage personal finance tracking. Supports categories, tags, and monthly summaries.

按月组织结构化的 Markdown 文件记录每日支出。适用于用户记录消费、查看支出摘要、分析消费模式或管理个人财务追踪。支持分类、标签和月度汇总。