[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

[UPD] Update agreement_legal.pot

agreement_legal/i18n/agreement_legal.pot

@@ -915,8 +915,11 @@ msgid "Name:"
 msgstr ""
 
 #. module: agreement_legal
+#: code:addons/agreement_legal/models/agreement.py:78
 #: code:addons/agreement_legal/models/agreement.py:79
+#: code:addons/agreement_legal/models/agreement.py:359
 #: code:addons/agreement_legal/models/agreement.py:360
+#: code:addons/agreement_legal/models/agreement.py:362
 #: code:addons/agreement_legal/models/agreement.py:363
 #, python-format
 msgid "New"

agreement_legal/models/agreement.py

@@ -5,8 +5,7 @@ from odoo import _, api, fields, models
 
 
 class Agreement(models.Model):
-    _name = "agreement"
-    _inherit = ["agreement", "mail.thread"]
+    _inherit = "agreement"
 
     # General
     name = fields.Char(string="Title", required=True)

agreement_legal/views/agreement.xml

@@ -235,6 +235,7 @@
                 </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>