Standardize store exports to named useXxxStore convention

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

src/components/File/UploadModal.vue

@@ -18,12 +18,12 @@
 import IconUploarding from '../icons/IconUploarding.vue';
 import { uploadFailedFirst } from '@/module/alertModal.js'
 import { storeToRefs } from 'pinia';
-import FilesStore from '@/stores/files.js';
+import { useFilesStore } from '@/stores/files.js';
 
 export default {
   props: ['uploadModal'],
   setup() {
-    const filesStore = FilesStore();
+    const filesStore = useFilesStore();
     const { uploadFileName } = storeToRefs(filesStore);
 
     return { filesStore, uploadFileName }