Fix: Update func predict_valid, distinguish the selling status

module/shop/base.py

@@ -47,12 +47,8 @@ FILTER = Filter(FILTER_REGEX, FILTER_ATTR)
 
 class ShopItem_250814(Item):
     def predict_valid(self):
-        """
-        2025-08-14 shop ui update, calculate variance of sold items,
-        Select the sold xx with a variance of 1298, set threshold to 1400,
-        other unsold items are generally above 1700
-        """
-        return np.var(rgb2gray(self.image)) > 1400
+        mean = np.mean(rgb2gray(self.image) > 139)
+        return mean > 0.23
 
 
 class ShopItemGrid(ItemGrid):