Shop Sales Expense And Staff Manager

Build a complete shop management app in one HTML file. Record every sale, track expenses by category, keep staff on a payroll and mark salaries paid, then read a monthly statement with daily profit, best and worst day and an expense breakdown. Tiles compare today with yesterday and this month with last. A settings screen changes the shop name, currency and the category and role lists without code. Data stays on the device, with CSV and JSON backup. Light and dark themes, works on a phone.