```
<header>
<nav class='navbar navbar-expand-lg navigation navbar-light bg-light'>
<%= link_to '/', class: 'navbar-brand' do %>
<%= image_tag 'logo.png' %>
<% end %>
<button class='navbar-toggler' data-bs-toggle='collapse' data-bs-target='#navbarSupportedContent'
aria-controls='navbarSupportedContent' aria-expanded='false' aria-label='Toggle navigation'>
<span class='navbar-toggler-icon'></span>
</button>
<div class='collapse navbar-collapse' id='navbarSupportedContent'>
<ul class='navbar-nav ms-auto main-nav align-items-center'>
<li class='nav-item dropdown dropdown-slide'>
<%= link_to t('header.board'), '#', class: 'nav-link dropdown-toggle', data: { bs_toggle: 'dropdown' }, aria: { haspopup: 'true', expanded: 'false' }, id: 'header-board-menu' %>
<div class='dropdown-menu dropdown-menu-end'>
<%= link_to t('header.board_index'), boards_path, class: 'dropdown-item' %>
<%= link_to t('header.create_board'), new_board_path, class: 'dropdown-item' %>
</div>
</li>
<li class='nav-item'>
<%= link_to t('header.bookmark_index'), bookmarks_boards_path, class: 'nav-link' %>
</li>
<li class='nav-item dropdown dropdown-slide'>
<%= link_to '#', class: 'nav-link', data: { bs_toggle: 'dropdown' }, aria: { haspopup: 'true', expanded: 'false' }, id: 'header-profile' do %>
<%= image_tag current_user.avatar_url, class: 'rounded-circle mr15', width: '40', height: '40' %>
<% end %>
<div class='dropdown-menu dropdown-menu-end'>
<div class='dropdown-item'><%= current_user.decorate.full_name %></div>
<div class='dropdown-divider'></div>
<%= link_to t('header.profile'), profile_path, class: 'dropdown-item' %>
<%= link_to t('header.logout'), logout_path, class: 'dropdown-item', data: { turbo_method: :delete } %>
</div>
</li>
</ul>
</div>
</nav>
</header>
```