feat(manager): Part 2 — Online Orders page and sidebar integration

- connect_orders.py: add GET /api/connect/orders?status=active|history endpoints
- api/client.js: add getIncomingOrders, getActiveOrders, getOrderHistory,
  acceptOnlineOrder, rejectOnlineOrder, updateOnlineOrderStatus
- OnlineOrdersPage.jsx: three-tab page (Incoming / Active / History) with
  order cards, action buttons (accept/reject/status progression),
  20 s polling, SSE listener for online_order_received/updated events,
  and optimistic UI updates
- App.jsx: add /online-orders route
- Sidebar.jsx: add Online Orders nav item with red badge showing pending count,
  polling every 20 s independently of the page

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

local_backend/routers/connect_orders.py

@@ -63,6 +63,38 @@ async def _mirror_status_to_cloud(cloud_order_id: int, new_status: str, rejectio
 
 # ── Endpoints ─────────────────────────────────────────────────────────────────
 
+@router.get("/orders", response_model=list[OrderOut])
+def get_orders_by_status(
+    status: str,
+    db: Session = Depends(get_db),
+    user: User = Depends(get_current_user),
+):
+    """
+    ?status=active  → accepted | preparing | ready | out_for_delivery, newest first
+    ?status=history → delivered | rejected, newest first, limit 50
+    """
+    if status == "active":
+        statuses = ["accepted", "preparing", "ready", "out_for_delivery"]
+        orders = (
+            db.query(Order)
+            .filter(Order.source == "online", Order.online_status.in_(statuses))
+            .order_by(Order.opened_at.desc())
+            .all()
+        )
+    elif status == "history":
+        statuses = ["delivered", "rejected"]
+        orders = (
+            db.query(Order)
+            .filter(Order.source == "online", Order.online_status.in_(statuses))
+            .order_by(Order.opened_at.desc())
+            .limit(50)
+            .all()
+        )
+    else:
+        raise HTTPException(status_code=400, detail=f"Unknown status filter '{status}'. Use 'active' or 'history'.")
+    return orders
+
+
 @router.get("/orders/incoming", response_model=list[OrderOut])
 def get_incoming_orders(
     db: Session = Depends(get_db),