fix(cache): tkds→tkfb 변경 후 전 서비스 캐시 버스팅 갱신

tkfb-core.js v=2026040104, tksupport/tksafety/tkpurchase/tkuser-core.js,
system2 api-base.js, system3 app.js 캐시 버스팅 일괄 갱신.
브라우저 캐시에 남은 구버전(tkds 리다이렉트) 강제 갱신.

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

user-management/web/index.html

@@ -2418,7 +2418,7 @@
     </div>
 
     <!-- JS: Core (config, token, api, toast, helpers, init) -->
-    <script src="/static/js/tkuser-core.js?v=2026032501"></script>
+    <script src="/static/js/tkuser-core.js?v=2026040101"></script>
     <!-- JS: Tabs -->
     <script src="/static/js/tkuser-tabs.js?v=2026032301"></script>
     <!-- JS: Individual modules -->