fix(monthly-confirm): 무한 로딩 수정 — window.currentUser → getCurrentUser()

tkfb-core.js의 currentUser는 let 모듈 스코프라 window에 안 붙음.
getCurrentUser() 함수 사용으로 전환.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

system1-factory/web/pages/attendance/my-monthly-confirm.html

@@ -103,7 +103,7 @@
 
     <script src="/static/js/tkfb-core.js?v=2026033108"></script>
     <script src="/js/api-base.js?v=2026031701"></script>
-    <script src="/js/my-monthly-confirm.js?v=2026033101"></script>
+    <script src="/js/my-monthly-confirm.js?v=2026040101"></script>
     <script>initAuth();</script>
 </body>
 </html>