fix: add safeCreateIcons import to auth.js + export closeHeaderMenu from ui.js

frontend/js/auth.js

@@ -1,5 +1,7 @@
 /* ObsiGate — Authentication: API helper, AuthManager, login form, AdminPanel */
 import { state } from './state.js';
+import { safeCreateIcons } from './utils.js';
+import { showToast } from './ui.js';
 
 // ---------------------------------------------------------------------------
 // API helpers

frontend/js/ui.js

@@ -192,7 +192,7 @@ export function initHeaderMenu() {
   });
 }
 
-function closeHeaderMenu() {
+export function closeHeaderMenu() {
   const menuBtn = document.getElementById("header-menu-btn");
   const menuDropdown = document.getElementById("header-menu-dropdown");
   if (!menuBtn || !menuDropdown) return;