[FIX] helpdesk_mgmt_templates: fix bugs on UI

Add new field for categories in ticket for domain in UI
Remove the editable bottom for Categories Tree View and add  Form view for categories to improve UX creating big templates.

helpdesk_mgmt_templates/__manifest__.py

@@ -9,6 +9,9 @@
     "author": "Cetmix OÜ, Odoo Community Association (OCA)",
     "website": "https://github.com/OCA/helpdesk",
     "depends": ["helpdesk_mgmt"],
-    "data": ["views/helpdesk_ticket_category_views.xml"],
+    "data": [
+        "views/helpdesk_ticket_views.xml",
+        "views/helpdesk_ticket_category_views.xml",
+    ],
     "application": False,
 }

helpdesk_mgmt_templates/models/helpdesk_ticket.py

@@ -9,6 +9,14 @@ class HelpdeskTicket(models.Model):
     _inherit = "helpdesk.ticket"
 
     description = fields.Html(store=True, compute="_compute_description")
+    helpdesk_ticket_category_ids = fields.Many2many(
+        "helpdesk.ticket.category", compute="_compute_helpdesk_ticket_category"
+    )
+
+    @api.depends("team_id")
+    def _compute_helpdesk_ticket_category(self):
+        for rec in self:
+            rec.helpdesk_ticket_category_ids = rec.team_id.category_ids.ids
 
     @api.depends("category_id")
     def _compute_description(self):

helpdesk_mgmt_templates/views/helpdesk_ticket_category_views.xml

@@ -4,10 +4,11 @@
         <field name="name">view.helpdesk_category.tree</field>
         <field name="model">helpdesk.ticket.category</field>
         <field name="inherit_id" ref="helpdesk_mgmt.view_helpdesk_category_tree" />
+        <field name="priority">99</field>
         <field name="arch" type="xml">
-            <field name="name" position="after">
-                <field name="template_description" optional="show" />
-            </field>
+            <xpath expr="//tree" position="attributes">
+            <attribute name="editable" />
+        </xpath>
         </field>
     </record>
     <record id="view_helpdesk_category_form" model="ir.ui.view">

helpdesk_mgmt_templates/views/helpdesk_ticket_views.xml

@@ -0,0 +1,19 @@
+<?xml version='1.0' encoding='utf-8' ?>
+<odoo>
+    <record id="ticket_view_form" model="ir.ui.view">
+        <field name="name">helpdesk.ticket.view.form</field>
+        <field name="model">helpdesk.ticket</field>
+        <field name="inherit_id" ref="helpdesk_mgmt.ticket_view_form" />
+        <field name="priority">99</field>
+        <field name="arch" type="xml">
+            <field name="category_id" position="before">
+                <field name="helpdesk_ticket_category_ids" invisible="1" />
+            </field>
+            <field name="category_id" position="attributes">
+                <attribute
+                    name="domain"
+                >[('id', 'in', helpdesk_ticket_category_ids)]</attribute>
+            </field>
+        </field>
+    </record>
+</odoo>