Backend:
- New router /api/kds/:
- GET /items — returns all active order items for open orders, grouped by printer zone
(zone_id, zone_name, items array with table_name, product_name, qty, notes, added_at)
Zones sorted by zone_id asc, no-zone column last
- PUT /orders/{order_id}/items/{item_id}/status — mark item 'ready' (active→ready only)
Broadcasts item_status_changed SSE event to all connected clients
- No migration needed — 'ready' is a new valid string value for order_items.status
- pay_items endpoint: now accepts 'ready' items as payable (status.in_(['active','ready']))
- active_remaining count for order status also includes 'ready' items
Frontend:
- KdsPage (/kds): full-screen dark layout, columns per printer zone
- Zone columns: dark header with zone name + pending count, scrollable item cards
- Item cards: table name badge, elapsed time (colour-coded: green<8m, amber<15m, red>=15m),
product name + quantity, notes in amber, tap anywhere to mark ready
- Optimistic marking: card dims while request in flight, disappears on success
- SSE live updates: listens for order_updated / item_status_changed / order_paid / order_closed
- Fallback poll every 30s; manual ↻ Ανανέωση button; live clock in top bar
- Empty state: ✓ message when no pending items
- Sidebar: ChefHat icon for KDS (after Αποβλήτα)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
