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/restore_system_collection_modal.templ

@@ -1,11 +1,11 @@
 package templates
 
 templ RestoreSystemCollectionModal() {
-	<div class="fixed inset-0 z-50 flex items-center justify-center bg-black/70">
+	<div x-data="collections" class="fixed inset-0 z-50 flex items-center justify-center bg-black/70">
 		<div class="card rounded-lg p-6 w-full max-w-md mx-4" style="background-color: var(--bg-secondary); border-color: var(--border);">
 			<div class="flex justify-between items-center mb-6">
 				<h2 class="text-xl font-bold" style="color: var(--text-primary)">Restore System Collection</h2>
-				<button type="button" onclick="closeCollectionModal()" class="p-2 hover:opacity-80 rounded" style="color: var(--text-primary)">✕</button>
+				<button type="button" @click="closeCollectionModal()" class="p-2 hover:opacity-80 rounded" style="color: var(--text-primary)">✕</button>
 			</div>
 			<div class="mb-4">
 				<p class="mb-4" style="color: var(--text-secondary)">Select a system collection to restore:</p>
@@ -21,7 +21,7 @@ templ RestoreSystemCollectionModal() {
 						<option value="not-started">Not Started</option>
 					</select>
 					<div class="flex justify-end space-x-3 mt-6">
-						<button type="button" onclick="closeCollectionModal()" class="btn-secondary px-4 py-2 rounded-lg">Cancel</button>
+						<button type="button" @click="closeCollectionModal()" class="btn-secondary px-4 py-2 rounded-lg">Cancel</button>
 						<button type="submit" class="btn-primary px-4 py-2 rounded-lg">Restore</button>
 					</div>
 				</form>