Billfold Card Controls

Spend controls for one credit card where the limit actually bites: what has been spent reduces from the activity array, what is left is the limit minus it, and stepping the limit under the month's spend warns that the card is off until the first of next month. Per category and per channel switches, each with one line saying what changes.

粘贴到 Claude Code、Cursor 或 Windsurf 中，它会在你的应用中 1:1 构建这个界面。