Can I vibe code ConnectPOS?

Build a multi-platform Web Point of Sale (POS) application optimized for desktop and tablet browsers, connecting directly to e-commerce backends via REST/GraphQL APIs.

1. ARCHITECTURE & LOCAL STORAGE:
- Implement an offline-first architecture using IndexedDB (via Dexie.js) as the local storage engine.
- Cache product catalog (variants, SKUs, barcodes, prices, stock levels), customer records, and active discount rules locally.
- Build a synchronization queue that tracks offline completed orders. When internet reconnects, flush the queue sequentially to the primary e-commerce API using optimistic locking.

2. CASHIER UI & BARCODE HANDLING:
- Create a high-speed grid UI optimized for touch screens and keyboard-only operation.
- Implement global barcode listener: register input from hardware USB/Bluetooth barcode scanners operating in HID keyboard mode (listening for rapid keystroke sequences ending in Enter).
- Build quick product search, category filters, cart management (item overrides, custom discounts, tax-exempt toggles), customer attachment, and multi-tender split payment options (Cash, Card, Store Credit).

3. PRINTER & PAYMENT TERMINAL HARDWARE INTEGRATION:
- Integrate WebUSB / WebBluetooth APIs to directly format and transmit raw ESC/POS command bytes to thermal receipt printers (e.g., Epson, Star Micronics).
- Integrate Stripe Terminal JS SDK (or generic network payment reader SDK) for processing EMV card payments directly from the browser context.
- Provide fallback cash-drawer kick out pulse commands via receipt printer peripheral RJ12 interfaces.

4. FAILURE MODES & EDGE CASES:
- Race condition handling: If an item is bought online while the POS register is offline, detect stock inventory mismatch during queue flush and generate an actionable warning log for store managers rather than failing silently.
- Handle payment reader timeouts gracefully: allow manual transaction override with mandatory audit log note.

5. OUT OF SCOPE:
- Enterprise warehouse management/transfer routes.
- Built-in payroll or employee shift scheduling.

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