Bump cache-bust ?v=9 for vaix-add-product + rebuild trigger

Dockerfile

@@ -11,4 +11,4 @@ EXPOSE 7860
 USER bun
 CMD ["bun", "index.ts"]
 
-# Rebuild trigger: 1786976148 fix-ocr-price-preview
+# Rebuild trigger: 1786976466 cache-bust-v9

index.html

@@ -862,7 +862,7 @@
 
     <!-- ── Thêm SP (Add Product) module: 100% port from V.AISTUDIO, gated by the
          homepage V.AISTUDIO access code (window.isVaAdmin()). ── -->
-    <script defer src="./src/vaix-add-product.js?v=8"></script>
+    <script defer src="./src/vaix-add-product.js?v=9"></script>
     <script defer src="./src/vaix-bulk-import.js?v=2"></script>
   </body>
 </html>