fix: group products by design to eliminate duplicates

backend/app/services/design_service.py

@@ -170,42 +170,58 @@ class DesignService:
         products = []
 
         for design in designs:
-            for dp in design.products:
-                # Filter by product type if specified
-                if product_type and dp.type != product_type:
-                    continue
+            # Skip designs with no products
+            if not design.products:
+                continue
 
-                variants = [
-                    ProductVariant(
-                        name=v,
-                        sku=f"{dp.sku}-{v}",
-                        provider=dp.provider,
-                        price=dp.retail_price,
-                    )
-                    for v in dp.variants
-                ] if dp.variants else [
-                    ProductVariant(
-                        name="default",
-                        sku=dp.sku,
-                        provider=dp.provider,
-                        price=dp.retail_price,
-                    )
-                ]
+            # Filter by product type if specified
+            matching_products = [
+                dp for dp in design.products
+                if not product_type or dp.type == product_type
+            ]
 
-                products.append(
-                    Product(
-                        slug=design.slug,
-                        name=design.name,
-                        description=design.description,
-                        category=design.category,
-                        product_type=dp.type,
-                        tags=design.tags,
-                        image_url=design.image_url,
-                        base_price=dp.retail_price,
-                        variants=variants,
-                        is_active=True,
+            if not matching_products:
+                continue
+
+            # Use the first matching product for base info, combine all variants
+            dp = matching_products[0]
+            all_variants = []
+
+            for mp in matching_products:
+                if mp.variants:
+                    for v in mp.variants:
+                        all_variants.append(
+                            ProductVariant(
+                                name=f"{v} ({mp.provider})",
+                                sku=f"{mp.sku}-{v}",
+                                provider=mp.provider,
+                                price=mp.retail_price,
+                            )
+                        )
+                else:
+                    all_variants.append(
+                        ProductVariant(
+                            name=f"default ({mp.provider})",
+                            sku=mp.sku,
+                            provider=mp.provider,
+                            price=mp.retail_price,
+                        )
                     )
+
+            products.append(
+                Product(
+                    slug=design.slug,
+                    name=design.name,
+                    description=design.description,
+                    category=design.category,
+                    product_type=dp.type,
+                    tags=design.tags,
+                    image_url=design.image_url,
+                    base_price=dp.retail_price,
+                    variants=all_variants,
+                    is_active=True,
                 )
+            )
 
         return products