feat: add catalogue image management (#1)

- Add CatalogueImage model with FK to Product
- Add image resize service (strict/non-strict modes with configurable dimensions)
- Add CRUD API endpoints with admin-only write permissions
- Add catalogue_images field to product listing/detail endpoints
- Serve media files in development via static()
- 28 TDD tests covering model, API, permissions, resize, and product listing

tienda_ilusion/don_confiao/api/__init__.py

@@ -1,3 +1,4 @@
+from .catalogue_images import CatalogueImageViewSet
 from .products import ProductView, ProductsFromTrytonView
 from .customers import CustomerView, CustomersFromTrytonView
 from .sales import (
@@ -19,6 +20,8 @@ from .payments import (
 from .admin import AdminCodeValidateView
 
 __all__ = [
+    # Catalogue Images
+    "CatalogueImageViewSet",
     # Products
     "ProductView",
     "ProductsFromTrytonView",

tienda_ilusion/don_confiao/api/catalogue_images.py

@@ -0,0 +1,25 @@
+from rest_framework import viewsets
+from rest_framework.permissions import IsAuthenticated
+
+from ..image_service import resize_catalogue_image
+from ..models.catalogue_images import CatalogueImage
+from ..permissions import IsAdministrator
+from ..serializers.catalogue_images import CatalogueImageSerializer
+
+
+class CatalogueImageViewSet(viewsets.ModelViewSet):
+    queryset = CatalogueImage.objects.all()
+    serializer_class = CatalogueImageSerializer
+
+    def get_permissions(self):
+        if self.action in ("create", "update", "partial_update", "destroy"):
+            return [IsAuthenticated(), IsAdministrator()]
+        return [IsAuthenticated()]
+
+    def perform_create(self, serializer):
+        instance = serializer.save()
+        resize_catalogue_image(instance.image)
+
+    def perform_update(self, serializer):
+        instance = serializer.save()
+        resize_catalogue_image(instance.image)