fix: discard unsaved group settings and key the groups list (#28076)

* fix: stop unsaved group settings from persisting into the group list state

* fix: key the groups list so an open modal cannot rebind to another group

src/lib/components/admin/Users/Groups.svelte

@@ -176,7 +176,7 @@
 
 		{#if filteredGroups.length !== 0}
 			<div class="mt-1 grid grid-cols-1">
-				{#each filteredGroups as group, idx}
+				{#each filteredGroups as group, idx (group.id)}
 					<GroupItem {group} {setGroups} {defaultPermissions} />
 					{#if idx < filteredGroups.length - 1}
 						<hr class="border-gray-50 dark:border-gray-850/40" />

src/lib/components/admin/Users/Groups/EditGroupModal.svelte

@@ -96,7 +96,7 @@
 				features: { ...DEFAULT_PERMISSIONS.features, ...loadedPermissions.features },
 				settings: { ...DEFAULT_PERMISSIONS.settings, ...loadedPermissions.settings }
 			};
-			data = group?.data ?? {};
+			data = structuredClone(group?.data ?? {});
 
 			userCount = group?.member_count ?? 0;
 		}