flectra/addons/web_planner/views/web_planner_templates.xml

<?xml version="1.0" encoding="utf-8"?>
<flectra>
    <template id="assets_backend" name="planner assets" inherit_id="web.assets_backend">
        <xpath expr="." position="inside">
            <script type="text/javascript" src="/web_planner/static/src/js/web_planner_backend.js"></script>
        </xpath>
    </template>

    <template id="assets_common" name="planner common assets" inherit_id="web.assets_common">
        <xpath expr="." position="inside">
            <link rel="stylesheet" href="/web_planner/static/src/less/web_planner_common.less"/>
            <script type="text/javascript" src="/web_planner/static/src/js/web_planner_common.js"></script>
        </xpath>
    </template>

    <template id="pages">
        <t t-raw="0"/>
    </template>

    <template id="category">
      <div t-att-menu-category-id="menu_categorytitle" t-att-menu-classes="menu_categoryclasses">
        <t t-raw="0"/>
      </div>
    </template>

    <template id="page">
      <div t-att-id="page_id" t-att-title="page_title" t-att-hide-from-menu="hide_from_menu" t-att-hide-mark-as-done="hide_mark_as_done" class="o_planner_page container-fluid">
        <h1 t-esc="page_title" t-att-data-menutitle="page_menutitle or page_title" t-att-class="'hidden' if hide_title else None"/>
        <t t-raw="0"/>
      </div>
    </template>
</flectra>