fix: drastically reduce false-positive consumption anomaly banners

Two changes:
1. Skip prediction when expected_qty=0 — model says 'should be finished'
   but user simply restocked or consumed less. Not actionable.
2. Raise 'more than expected' threshold to 400% (was 30%).
   Having more than expected almost always means a restock the model
   doesn't know about yet — only truly extreme cases (>4x) are flagged.
   'Less than expected' stays at 30% (still actionable: unregistered use).

index.html

@@ -11,7 +11,7 @@
     <title>EverShelf</title>
     <link rel="manifest" href="manifest.json">
     <link rel="icon" type="image/png" href="assets/img/logo/logo_icon.png">
-    <link rel="stylesheet" href="assets/css/style.css?v=20260511h">
+    <link rel="stylesheet" href="assets/css/style.css?v=20260511i">
     <!-- QuaggaJS for barcode scanning -->
     <script src="https://cdn.jsdelivr.net/npm/@ericblade/quagga2@1.8.4/dist/quagga.min.js"></script>
     <!-- @xenova/transformers: ES-module bootstrap that exposes a lazy category-classifier as window._categoryPipelinePromise -->
@@ -1469,6 +1469,6 @@
     </div>
 </div>
 
-<script src="assets/js/app.js?v=20260511h"></script>
+<script src="assets/js/app.js?v=20260511i"></script>
 </body>
 </html>