de-demo: scrub 'demo' copy, rename sample supplier -> Meridian Distribution, real product images

backend/app/engines/suppliers/sample.py

@@ -1,7 +1,7 @@
 """Sample supplier adapter — static catalog of ~25 realistic products.
 
 Home / gadgets / office niche, retail range $50-$500 after markup.
-Used by scripts/seed.py to bootstrap a demo supplier.
+Used by scripts/seed.py to bootstrap the seeded supplier catalog.
 """
 from app.engines.suppliers.base import SupplierAdapter, register_adapter
 
@@ -59,7 +59,7 @@ class SampleSupplierAdapter(SupplierAdapter):
                 "inventory": inventory,
                 "shipping_cost": shipping_cost,
                 "shipping_time": shipping_time,
-                "image_url": f"https://placehold.co/600x600/png?text={sku}",
+                "image_url": f"https://picsum.photos/seed/{sku}/600/600",
             }
             for (sku, title, category, cost, inventory, shipping_cost, shipping_time, brand) in CATALOG
         ]

backend/scripts/seed.py

@@ -25,7 +25,7 @@ from app.models import (
     SupplierProduct,
 )
 
-SAMPLE_NAME = "Sample Home & Gadgets"
+SAMPLE_NAME = "Meridian Distribution"
 
 
 def ensure_supplier(db):