Convert all store files from JavaScript to TypeScript

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

tests/components/Login.test.js

@@ -7,7 +7,7 @@ vi.mock('@/module/apiError.js', () => ({
 }));
 
 import Login from '@/views/Login/Login.vue';
-import { useLoginStore } from '@/stores/login.ts';
+import { useLoginStore } from '@/stores/login';
 
 describe('Login', () => {
   let pinia;