Fix sidebar scroll preservation per page with x-navigate directive

- Add x-navigate directive to all sidebar document links for Alpine navigation
- Store scroll position per page using URL path as key in sessionStorage
- Each page now maintains its own scroll position in the sidebar
- Save scroll position before navigation and restore after navigation
- Scroll position is preserved when clicking links in the sidebar
- Works correctly with Alpine navigate events triggered by x-navigate directive

src/resources/views/livewire/sidebar-tree.blade.php

@@ -18,6 +18,7 @@
     @auth
         <div class="mt-6 pt-6 border-t border-gray-200">
             <a
+                x-navigate
                 href="{{ route('documents.create') }}"
                 class="flex items-center justify-center px-4 py-2 text-sm font-medium text-white bg-indigo-600 rounded-md hover:bg-indigo-700"
             >