suite/project_acceptance/data/mail_template_data.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data>
        <record id="project_acceptance_email_template" model="mail.template">
            <field name="name">Task Acceptance</field>
            <field name="model_id" ref="project.model_project_task"/>
            <field name="subject">{{ object.display_name }}: Task Approval Request</field>
            <field name="email_from">{{ (object.rating_get_rated_partner_id().email_formatted if object.rating_get_rated_partner_id() else user.email_formatted) }}</field>
            <field name="partner_to" >{{ object.rating_get_partner_id().id }}</field>
            <field name="body_html" type="html">
                <div>
                    <t t-set="access_token" t-value="object.rating_get_access_token()"/>
                    <t t-set="partner" t-value="object.rating_get_partner_id()"/>
                    <table border="0" cellpadding="0" cellspacing="0" width="590" style="width:100%; margin:0px auto;">
                    <tbody>
                        <tr><td valign="top" style="font-size: 13px;">
                            <t t-if="partner.name">
                                Hello <t t-out="partner.name or ''">Brandon Freeman</t>,<br/><br/>
                            </t>
                            <t t-else="">
                                Hello,<br/><br/>
                            </t>
                            Please take a moment to review and approve, decline or provide feedback on this task: "<strong t-out="object.display_name or ''"></strong>"
                        </td></tr>
                        <tr><td style="text-align: center;">
                            <table border="0" cellpadding="0" cellspacing="0" width="590" summary="o_mail_notification" style="width:100%; margin: 32px 0px 32px 0px;">
                                <tr><td style="font-size: 13px;">
                                    <!-- <strong>Please click on one of the below icons to indicate approval.</strong><br/> -->
                                    <strong>Please click on one of the below icons to go back to the portal and can confirm your selection.</strong><br/>
                                </td></tr>
                                <tr><td style="font-size: 13px;">
                                    <table style="width:100%;text-align:center;margin-top:2rem;">
                                        <tr>
                                            <td>
                                                <a role="button" class="btn btn-primary" t-attf-href="{{object.get_base_url()}}/my/task/{{object.id}}" style="color: #ffffff">
                                                    <i class="fa fa-check"/> Accepted</a>
                                            </td>
                                            <td>
                                                <a role="button" class="btn btn-danger" t-attf-href="{{object.get_base_url()}}/my/task/{{object.id}}" style="color: #ffffff">
                                                    <i class="fa fa-stop-circle"/> Declined</a>
                                            </td>
                                            <td>
                                                <a role="button" class="btn btn-warning" t-attf-href="{{object.get_base_url()}}/my/task/{{object.id}}/#discussion" style="color: #ffffff">
                                                    <i class="fa fa-comment"/> Feedback</a>                                                
                                            </td>
                                        </tr>
                                    </table>
                                </td></tr>
                            </table>
                        </td></tr>

                        <!-- <tr><td style="text-align: center;">
                            <table border="0" cellpadding="0" cellspacing="0" width="590" summary="o_mail_notification" style="width:100%; margin: 32px 0px 32px 0px;">
                                <tr><td style="font-size: 13px;">
                                    <strong>Please click on one of the below icons to indicate approval.</strong><br/>
                                    <strong>Please click on to go to the portal and confirm your selection</strong><br/>
                                </td></tr>
                                <tr><td style="font-size: 13px;">
                                    <table style="width:100%;text-align:center;margin-top:2rem;">
                                        <tr>
                                            <a role="button" class="btn btn-primary" t-attf-href="{{object.get_base_url()}}/my/task/{{object.id}}" style="color: #ffffff"> Go to the portal</a>
                                        </tr>
                                    </table>
                                </td></tr>
                            </table>
                        </td></tr> -->


                        
                        <tr><td valign="top" style="font-size: 13px;">
                            This task will remain in the "<strong t-out="object.stage_id.name"></strong>" until the task is approved or declined.
                            <t t-if="object.project_id.rating_status == 'stage'">
                                <br/><span style="margin: 0px 0px 0px 0px; font-size: 12px; opacity: 0.5; color: #454748;">This customer survey has been sent because your task has been moved to the stage <b t-out="object.stage_id.name or ''">In progress</b></span>
                            </t>
                        </td></tr>
                    </tbody>
                    </table>
                </div>
            </field>
            <field name="lang">{{ object.rating_get_partner_id().lang }}</field>
            <field name="auto_delete" eval="True"/>
        </record>
    </data>
</odoo>