[IMP] agreement,agreement_legal: support activities

- The `agreement` model now features mail and activities from its base module.
- The `agreement_legal` module doesn't need to add mail support now.
- Add activities to form views.

@Tecnativa TT22477

agreement/__manifest__.py

@@ -11,7 +11,7 @@
               'Odoo Community Association (OCA)',
     'website': 'https://github.com/oca/contract',
     'license': 'AGPL-3',
-    'depends': ['base'],
+    'depends': ['mail'],
     'data': [
         'security/ir.model.access.csv',
         'security/agreement_security.xml',

agreement/models/agreement.py

@@ -8,6 +8,7 @@ from odoo import models, fields
 class Agreement(models.Model):
     _name = 'agreement'
     _description = 'Agreement'
+    _inherit = ["mail.thread", "mail.activity.mixin"]
 
     code = fields.Char(required=True, copy=False)
     name = fields.Char(required=True)

agreement/views/agreement.xml

@@ -12,6 +12,7 @@
     <field name="model">agreement</field>
     <field name="arch" type="xml">
         <form string="Agreement">
+            <sheet>
                 <div class="oe_button_box" name="button_box">
                     <button name="toggle_active" type="object"
                         class="oe_stat_button" icon="fa-archive">
@@ -39,6 +40,12 @@
                 <notebook>
                     <page name="config" string="Configuration" attrs="{'invisible': True}"/>
                 </notebook>
+            </sheet>
+            <div class="oe_chatter">
+                <field name="message_follower_ids" widget="mail_followers"/>
+                <field name="activity_ids" widget="mail_activity"/>
+                <field name="message_ids" widget="mail_thread"/>
+            </div>
         </form>
     </field>
 </record>