20260316i: Low-stock Bring prompt after use

- API returns total_remaining, product_name, unit, default_qty after use
- isLowStock() detects when inventory is running low (pz<=2, conf<=1, weight/vol<=25% of default)
- After using a product, if low stock detected, shows prompt asking to add to Bring shopping list
- Works in main USE form, USE ALL, and recipe ingredient USE
- Prompt chains properly: low-stock then move-after-use (if applicable)
- Skips prompt when product is fully depleted (already auto-added to Bring)

index.html

@@ -9,7 +9,7 @@
     <title>Dispensa Manager</title>
     <link rel="manifest" href="manifest.json">
     <link rel="icon" type="image/svg+xml" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='.9em' font-size='90'>🏠</text></svg>">
-    <link rel="stylesheet" href="assets/css/style.css?v=20260316h">
+    <link rel="stylesheet" href="assets/css/style.css?v=20260316i">
     <!-- QuaggaJS for barcode scanning -->
     <script src="https://cdn.jsdelivr.net/npm/@ericblade/quagga2@1.8.4/dist/quagga.min.js"></script>
 </head>
@@ -911,6 +911,6 @@
     </div>
 </div>
 
-<script src="assets/js/app.js?v=20260316h"></script>
+<script src="assets/js/app.js?v=20260316i"></script>
 </body>
 </html>