Fixed a lot of responsive problems.

- Fixed auth problem
- Fixed BBCode and Markdown apparition in some unnecessary parts

resources/views/layouts/app.blade.php

@@ -33,6 +33,11 @@
 
     </div>
 
+    <button type="button" class="back-to-top" aria-label="Back to top" onclick="document.getElementById('content')?.scrollTo({ top: 0, behavior: 'smooth' });">
+        <i data-lucide="arrow-up"></i>
+        <span>Top</span>
+    </button>
+
     @include('components.hovercard')
     @livewireScripts
     @stack('scripts')

resources/views/layouts/menu.blade.php

@@ -38,7 +38,11 @@
         </div>
         <div class="menu-user-info">
             <span class="username">
-                {{ $VISITOR->username ?? "Guest" }}
+                @if( $VISITOR->guest() )
+                    Guest
+                @else
+                    <x-xf-username-link :user-id="$VISITOR->user_id" />
+                @endif
             </span>
             <span class="user_role">
                 <a href="{{ $VISITOR->guest() ? xfRoute('login') : xfRoute('logout') . '?t=' . xfCsrfToken() }}">