refactor: Add Alpine.js registration to existing TypeScript modules

Added Alpine.global() registration to enable template access to functions:

- admin.ts: Added Alpine for scan, stats, and settings functions
- api-explorer.ts: Already had Alpine (kept as is)
- bookshelf.ts: Added Alpine for library/bookshelf interactions
- collections.ts: Added Alpine for collection management
- conflicts.ts: Added Alpine for conflict resolution
- device-management.ts: Added Alpine with event delegation for dynamic content
- header.ts: Added Alpine for theme dropdown and user menu
- library.ts: Added Alpine registrations
- linking.ts: Added Alpine registrations
- queue.ts: Added Alpine for queue operations
- search.ts: Added Alpine registrations
- themeDropdown.ts: Added Alpine for theme switching

Each module now exports functions both traditionally and via Alpine.global() for template access.

web/src/header.ts

@@ -1,5 +1,9 @@
 // Header functionality
 
+import { Alpine } from "./alpine";
+import { applyTheme } from "./theme";
+import { updateThemeIndicators } from "./themeDropdown";
+
 const toggleThemeDropdown = (): void => {
   const dropdown = document.getElementById("theme-dropdown");
   if (dropdown) {
@@ -28,9 +32,7 @@ const toggleUserMenu = (): void => {
 
 const changeThemeTo = (theme: string): void => {
   // Apply the theme using the consolidated function from theme.ts
-  if ((window as any).applyTheme) {
-    (window as any).applyTheme(theme);
-  }
+  applyTheme(theme);
 
   // Save to server if logged in
   const token = localStorage.getItem("token");
@@ -85,8 +87,14 @@ document.addEventListener("click", (e) => {
   }
 });
 
-// Make functions available globally
-(window as any).toggleThemeDropdown = toggleThemeDropdown;
-(window as any).toggleUserMenu = toggleUserMenu;
-(window as any).changeThemeTo = changeThemeTo;
-(window as any).logout = logout;
+export { toggleThemeDropdown, toggleUserMenu, changeThemeTo, logout };
+
+Alpine.global("header", {
+  logout,
+  toggleThemeDropdown,
+  toggleUserMenu,
+  changeThemeTo: (theme: string) => {
+    changeThemeTo(theme);
+    updateThemeIndicators(); // Call themeDropdown function
+  },
+});