Kill the QRcode scanner when exiting the view

src/routes/private/scanner/QRScanner.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-    import { onMount } from 'svelte';
+    import { onMount, onDestroy } from 'svelte';
     import {
         Html5QrcodeScanner,
         type Html5QrcodeResult,
@@ -37,6 +37,12 @@
         );
         scanner.render(onScanSuccess, onScanFailure);
     });
+
+    onDestroy(() => {
+        if (scanner) {
+            scanner.clear().catch(() => {});
+        }
+    });
 </script>
 
 <div id="qr-scanner" class="w-full h-full max-w-none overflow-hidden rounded-sm"></div>