refactor: Convert template event handlers to Alpine.js

Converted all inline onclick/onsubmit handlers to Alpine.js @click/@submit directives and added x-data attributes to template body tags.

Templates updated:
- admin.templ: Added x-data="admin", converted scan/hide buttons
- analytics.templ: Added x-data, converted loadAnalytics button
- api_explorer.templ: Added x-data for API explorer page
- bookshelf.templ: Added x-data, converted library/pagination handlers
- collection_modal.templ: Added x-data for modal components
- collection_rules.templ: Added x-data, converted all rule handlers
- collections.templ: Added x-data, converted navigation/book handlers
- conflicts.templ: Added x-data, converted resolve/dismiss handlers
- header.templ: Converted theme dropdown and user menu handlers
- index.templ: Added x-data for theme/auth
- login.templ: Added x-data for theme switching
- profile.templ: Added x-data, converted delete account
- profile_form.templ: Converted modal close handler
- profile_modal.templ: Added x-data for modal
- progress.templ: Removed script (uses header.logout)
- queue.templ: Added x-data, converted queue handlers
- register.templ: Added x-data for theme
- restore_system_collection_modal.templ: Added x-data
- toast.templ: Converted to x-init with Alpine
- unlinked_books.templ: Added x-data for bulk operations

Dynamic content in devices.templ uses event delegation via data attributes.

templates/profile_modal.templ

@@ -1,7 +1,7 @@
 package templates
 
 templ ProfileModal(user User) {
-	<div id="profile-modal" class="fixed inset-0 flex items-center justify-center z-50" style="background-color: rgba(0,0,0,0.5);">
+	<div id="profile-modal" class="fixed inset-0 flex items-center justify-center z-50" x-data="profileModal" x-init="setupProfileModal()" style="background-color: rgba(0,0,0,0.5);">
 		<div class="rounded-lg shadow-xl max-w-4xl w-full mx-4 max-h-[90vh] overflow-y-auto" style="background-color: var(--bg-secondary);">
 			<!-- Modal Header -->
 			<div class="flex justify-between items-center p-6 border-b" style="border-color: var(--border);">
@@ -12,7 +12,7 @@ templ ProfileModal(user User) {
 					</p>
 				</div>
 				<button
-					onclick="closeProfileModal()"
+					@click="closeProfileModal()"
 					class="text-2xl"
 					style="color: var(--text-secondary);"
 				>
@@ -26,20 +26,4 @@ templ ProfileModal(user User) {
 			</div>
 		</div>
 	</div>
-
-	<script>
-		function closeProfileModal() {
-			const modal = document.getElementById('profile-modal');
-			if (modal) {
-				modal.remove();
-			}
-		}
-
-		// Close modal on escape key
-		document.addEventListener('keydown', function(e) {
-			if (e.key === 'Escape') {
-				closeProfileModal();
-			}
-		});
-	</script>
 }