feat: implement backend API clients for multi-marketplace integration and frontend service layer

backend/lamoda_api/services/orders.py

@@ -0,0 +1,22 @@
+from typing import Dict, Any, List
+from ..client import LamodaClient
+
+class OrdersService:
+    """Service to handle Lamoda Orders (FBS)."""
+    
+    def __init__(self, client: LamodaClient):
+        self.client = client
+
+    def get_new_orders(self, limit: int = 100) -> Dict[str, Any]:
+        """
+        Get list of new orders (assembly tasks).
+        Endpoint: /v1/orders/new
+        """
+        return self.client.get("/v1/orders/new", params={"limit": limit})
+
+    def confirm_packaging(self, order_ids: List[str]) -> Dict[str, Any]:
+        """
+        Confirm that orders are packaged and ready for dispatch.
+        Endpoint: /v1/orders/pack
+        """
+        return self.client.post("/v1/orders/pack", data={"order_ids": order_ids})

backend/lamoda_api/services/products.py

@@ -0,0 +1,31 @@
+from typing import Dict, Any, List
+from ..client import LamodaClient
+
+class ProductsService:
+    """Service to handle Lamoda Products/Assortment."""
+    
+    def __init__(self, client: LamodaClient):
+        self.client = client
+
+    def get_list(self, limit: int = 100, offset: int = 0, **filters) -> Dict[str, Any]:
+        """
+        Get list of products in the seller's catalog.
+        Endpoint: /v1/products
+        """
+        params = {"limit": limit, "offset": offset}
+        params.update(filters)
+        return self.client.get("/v1/products", params=params)
+
+    def update_stocks(self, items: List[Dict[str, Any]]) -> Dict[str, Any]:
+        """
+        Update stock levels (FBS).
+        Endpoint: /v1/stocks
+        """
+        return self.client.post("/v1/stocks", data={"stocks": items})
+
+    def update_prices(self, items: List[Dict[str, Any]]) -> Dict[str, Any]:
+        """
+        Update prices for products.
+        Endpoint: /v1/prices
+        """
+        return self.client.post("/v1/prices", data={"prices": items})