- Gastos (Expenses): Added `/gastos` route, auto-creation of `expenses` DB table, and `gastos.html` to track net profit with split month/year dropdowns.
- Sales & Filters: Overhauled `/sales` backend to use pagination. Top summary cards now accurately reflect the selected payment method filter.
- Checkout Improvements:
- Added "Transferencia" as a payment option with numpad shortcuts.
- Built a "Pinned Products" quick-access grid using localStorage.
- Implemented a global processing lock to prevent duplicate sales on double-clicks.
- Burned the default HTML number arrows with custom CSS.
- Global Settings & Receipts:
- Created a global settings modal accessible from the navbar.
- Added localStorage toggles for custom business name and auto-print.
- Added "Restaurant Mode" toggle to prompt for Client Name and Pickup Time, which now dynamically prints on the receipt.
- Bug Fixes: Resolved Jinja `TemplateSyntaxError` crash and removed the duplicate search bar in the checkout view.
