Fix key errors

src/components/designer-controls/LabelPresetsBrowser.svelte

@@ -39,6 +39,7 @@
 </script>
 
 <div class="preset-browser overflow-y-auto border d-flex p-2 gap-1 flex-wrap {className}">
+  <!-- fixme: key -->
   {#each presets as item, idx (item)}
     <div
       role="button"

src/components/designer-controls/QRCodeParamsControls.svelte

@@ -64,8 +64,7 @@
         valueUpdated();
       }}>
       <option value={0}>Auto</option>
-      <!-- eslint-disable-next-line @typescript-eslint/no-unused-vars -->
-      {#each { length: 40 } as _, i (i)}
+      {#each { length: 40 }, i (i)}
         <option value={i + 1}>{i + 1}</option>
       {/each}
     </select>

src/components/designer-controls/SavedLabelsBrowser.svelte

@@ -47,7 +47,7 @@
 </script>
 
 <div class="labels-browser overflow-y-auto border d-flex p-2 gap-1 flex-wrap {className}">
-  {#each labels as item, idx (item.title)}
+  {#each labels as item, idx (item.timestamp)}
     <div
       tabindex="0"
       class="btn p-0 card-wrapper d-flex justify-content-center align-items-center {selectedIndex === idx