Use real product catalog in consumer interface

app.py

@@ -118,6 +118,23 @@ def _load_products_from_json():
     return []
 
 
+def _load_products_from_catalog():
+    path = DATA_DIR / "product_catalog.json"
+    try:
+        if path.exists():
+            products = json.loads(path.read_text(encoding="utf-8"))
+            if isinstance(products, list) and products:
+                out = []
+                for i, item in enumerate(products):
+                    item = dict(item)
+                    item.setdefault("source", "real product catalog")
+                    out.append(_coerce_product(item, i + 1))
+                return out
+    except Exception:
+        pass
+    return []
+
+
 def _load_products_from_explanation_csv():
     path = REPORT_DIR / "explanation_attention_summary.csv"
     if not path.exists():
@@ -178,7 +195,7 @@ def _coerce_product(item, idx=0):
 
 
 def _load_products():
-    products = _load_products_from_json() or _load_products_from_explanation_csv()
+    products = _load_products_from_catalog() or _load_products_from_json() or _load_products_from_explanation_csv()
     if products:
         return products
     return FALLBACK_PRODUCTS