fix: safe int/float helpers for dirty Excel data (min_box_qty, stock, etc.)

main.py

@@ -17,6 +17,28 @@ EXCEL_URL = os.getenv(
 REFRESH_HOURS = int(os.getenv("REFRESH_HOURS", "6"))
 
 app = FastAPI(title="MTZ Stock API", version="1.0.0")
+
+
+def safe_int(value, default):
+    if value is None:
+        return default
+    if isinstance(value, (int, float)):
+        return int(value)
+    try:
+        return int(str(value).strip())
+    except (ValueError, TypeError):
+        return default
+
+
+def safe_float(value, default):
+    if value is None:
+        return default
+    if isinstance(value, (int, float)):
+        return float(value)
+    try:
+        return float(str(value).strip())
+    except (ValueError, TypeError):
+        return default
 products_cache = []
 last_refresh = None
 cache_lock = threading.Lock()
@@ -49,16 +71,16 @@ def download_and_parse():
             ean = str(ean_raw).strip()
         brand_raw = row[9]  # col J
         brand = str(brand_raw) if brand_raw is not None else ""
-        min_box = row[10] if row[10] is not None else 1  # col K
+        min_box_raw = row[10]  # col K
         parsed.append(
             {
-                "item_code": int(row[1]),
+                "item_code": safe_int(row[1], 0),
                 "ean": ean,
                 "description": str(row[2] or ""),
-                "price_usd": float(row[4] or 0),
-                "stock": int(row[5] or 0),
+                "price_usd": safe_float(row[4], 0.0),
+                "stock": safe_int(row[5], 0),
                 "brand": brand,
-                "min_box_qty": int(min_box),
+                "min_box_qty": safe_int(min_box_raw, 1),
             }
         )
     with cache_lock: