Move the Ajutor nav link after Logout

Header nav order was Dashboard, Players, Playlists, Ajutor, Admin, Logout,
toggle. Ajutor now sits after Logout and before the theme toggle, so the
navigation links stay grouped and the two "settings"-style controls (logout,
help, theme) are together at the end.

app/templates/base.html

@@ -559,12 +559,12 @@
                         <img src="{{ url_for('static', filename='icons/playlist.svg') }}" alt="">
                         Playlists
                     </a>
+                    <a href="{{ url_for('admin.admin_panel') }}">Admin</a>
+                    <a href="{{ url_for('auth.logout') }}">Logout ({{ current_user.username }})</a>
                     <a href="{{ url_for('main.help_page') }}">
                         <img src="{{ url_for('static', filename='icons/help.svg') }}" alt="" onerror="this.style.display='none';">
                         Ajutor
                     </a>
-                    <a href="{{ url_for('admin.admin_panel') }}">Admin</a>
-                    <a href="{{ url_for('auth.logout') }}">Logout ({{ current_user.username }})</a>
                     <button class="dark-mode-toggle" onclick="toggleDarkMode()" title="Toggle Dark Mode">
                         <img id="theme-icon" src="{{ url_for('static', filename='icons/moon.svg') }}" alt="Toggle theme">
                     </button>