[IMP] mail, web: add the activity icon on partner kanban card

This commit adds "Next Activities" on kanban card of partners,
like on the app Contact.

Task-Id 2152180

closes odoo/odoo#41793

Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

addons/mail/views/res_partner_views.xml

@@ -26,6 +26,22 @@
             </field>
         </record>
 
+        <record id="res_partner_view_kanban_inherit_mail" model="ir.ui.view">
+            <field name="name">res.partner.view.kanban.inherit.mail</field>
+            <field name="model">res.partner</field>
+            <field name="inherit_id" ref="base.res_partner_kanban_view"/>
+            <field name="arch" type="xml">
+                <field name="type" position="after">
+                    <field name="activity_state"/>
+                </field>
+                <xpath expr="//div[hasclass('oe_kanban_details')]" position="inside">
+                    <div class="mt-auto">
+                        <field name="activity_ids" widget="kanban_activity"/>
+                    </div>
+                </xpath>
+            </field>
+        </record>
+
        <record id="res_partner_view_search_inherit_mail" model="ir.ui.view">
             <field name="name">res.partner.view.search.inherit.mail</field>
             <field name="model">res.partner</field>

addons/web/static/src/scss/kanban_view.scss

@@ -336,6 +336,8 @@
         }
 
         .oe_kanban_details {
+            display: flex;
+            flex-flow: column;
             width: 100%;
 
             // Useful for the class 'o_text_overflow'