enhance(frontend): IDにUUIDを使うのをやめる (#16138)

* wip

* Update flash-edit.vue

packages/frontend/src/utility/theme-editor.ts

@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { v4 as uuid } from 'uuid';
+import { genId } from '@/utility/id.js';
 
 import type { Theme } from '@/theme.js';
 import { themeProps } from '@/theme.js';
@@ -66,7 +66,7 @@ export const convertToMisskeyTheme = (vm: ThemeViewModel, name: string, desc: st
 	}
 
 	return {
-		id: uuid(),
+		id: genId(),
 		name, desc, author, props, base,
 	};
 };