chore(web): unique ID generation (#9932)

* chore(web): automatically generate unique IDs

* fix: revert changes to Slider

* chore: add test for id store

web/src/lib/components/photos-page/delete-asset-dialog.svelte

@@ -23,7 +23,6 @@
 </script>
 
 <ConfirmDialog
-  id="permanently-delete-asset-modal"
   title="Permanently delete asset{s(size)}"
   confirmText="Delete"
   onConfirm={handleConfirm}