web_assets/html/header_title.html

<div style="display:inline-flex;">
    <button id="chuanhu-menu-btn" onclick='menuClick()' class="chuanhu-ui-btn hover-round-btn"
        style="visibility: visible; width:42px; height:42px; margin-right:5px;">
        <svg viewBox="0 0 24 24" fill="currentColor">
            <path d="M3 18h18v-2H3v2zm0-5h18v-2H3v2zm0-7v2h18V6H3z"></path>
        </svg>
    </button>
</div>
<div style="margin-left: 6px;">
    <div>{app_title}</div>
</div>