POS offline mode

You can now enable offline mode for the Point of Sale in Settings → POS.

• Local catalog : products, categories, prices, and checkout references are cached on the device for fast scan and search without waiting on the API.
• Offline cash payments : when connectivity is lost at checkout, sales are saved locally and synced automatically when the API is back (card payments still require a connection).
• Status bar & pending drawer : see catalog sync time, connection status, and pending sales; open the drawer to review or trigger a manual sync.
• Local put on hold : if the server is unreachable, the cashier can park a basket locally and serve the next customer.