Convert all store files from JavaScript to TypeScript

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/File/UploadModal.vue

@@ -18,7 +18,7 @@
 import IconUploarding from '../icons/IconUploarding.vue';
 import { uploadFailedFirst } from '@/module/alertModal.js'
 import { storeToRefs } from 'pinia';
-import { useFilesStore } from '@/stores/files.js';
+import { useFilesStore } from '@/stores/files';
 
 export default {
   props: ['uploadModal'],