fix(tkfb): getCurrentUser() 추가 + monthly-comparison 초기화 수정

- tkfb-core.js: getCurrentUser() 글로벌 함수 추가
- monthly-comparison.js: window.currentUser → getCurrentUser() 전환
- 데이터 미로드 문제 해결

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

system1-factory/web/pages/attendance/monthly-comparison.html

@@ -157,9 +157,9 @@
     <!-- Toast -->
     <div id="toastContainer" class="toast-container"></div>
 
-    <script src="/static/js/tkfb-core.js?v=2026033001"></script>
+    <script src="/static/js/tkfb-core.js?v=2026033106"></script>
     <script src="/js/api-base.js?v=2026031701"></script>
-    <script src="/js/monthly-comparison.js?v=2026033103"></script>
+    <script src="/js/monthly-comparison.js?v=2026033106"></script>
     <script>initAuth();</script>
 </body>
 </html>