fix: delete VK product immediately when allow_to_sell becomes false

Previously only the create path checked allow_to_sell. The update path
kept syncing disabled products indefinitely.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/tasks/vk_sync.py

@@ -164,6 +164,25 @@ def _sync_product(
     now = _now()
 
     if product.vk_product_id:
+        # Delete from VK if product is no longer for sale
+        if not product.allow_to_sell:
+            resp = _vk_post("market.delete", {
+                "owner_id": owner_id,
+                "item_id": product.vk_product_id,
+            }, token, user_id=user_id)
+            if "error" not in resp:
+                from web.models.connections import VkCachedProduct
+                vk_p = db.query(VkCachedProduct).filter_by(
+                    user_id=user_id, vk_group_id=vk_group_id, vk_product_id=product.vk_product_id,
+                ).first()
+                if vk_p:
+                    db.delete(vk_p)
+                product.vk_product_id = None
+                logger.info("user=%s deleted VK product '%s' (disabled)", user_id, name)
+            else:
+                logger.warning("market.delete error for disabled product %s: %s", product.evotor_id, resp["error"])
+            return
+
         # Check if update needed
         changed = False
         # Re-read current VK state from cache