[ADD] hr_timesheet_hide_folded_project

Hide projects in a folded stage from the timesheet line project selector
and forbid creating projects on the fly from timesheet lines

hr_timesheet_hide_folded_projects/README.rst

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+=================================
+hr_timesheet_hide_folded_projects
+=================================
+
+In the timesheet line list view (as used on tasks, projects and the "My
+Timesheets" view), hide projects whose stage is
+folded, and forbid creating a new project on the fly from the project
+selector.
+
+Installation
+============
+
+Use Odoo normal module installation procedure to install
+``hr_timesheet_hide_folded_projects``.
+
+Known issues / Roadmap
+======================
+
+None yet.
+
+Bug Tracker
+===========
+
+Bugs are tracked on `our issues website <https://github.com/elabore-coop/hr-tools/issues>`_. In case of
+trouble, please check there if your issue has already been
+reported. If you spotted it first, help us smashing it by providing a
+detailed and welcomed feedback.
+
+Credits
+=======
+
+Contributors
+------------
+
+* Quentin Mondot
+
+Funders
+-------
+
+The development of this module has been financially supported by:
+* Elabore (https://elabore.coop)
+
+
+Maintainer
+----------
+
+This module is maintained by Elabore.

hr_timesheet_hide_folded_projects/__manifest__.py

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+# Copyright 2026 Elabore
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+{
+    "name": "hr_timesheet_hide_folded_projects",
+    "version": "18.0.1.0.0",
+    "author": "Elabore",
+    "website": "https://git.elabore.coop/elabore/hr-tools",
+    "maintainer": "Elabore",
+    "license": "AGPL-3",
+    "category": "HR",
+    "summary": "Hide projects in a folded stage from the timesheet line project selector, "
+    "and forbid creating projects on the fly from timesheet lines",
+    "depends": [
+        "hr_timesheet",
+    ],
+    "data": [
+        "views/hr_timesheet_views.xml",
+    ],
+    "installable": True,
+    "auto_install": False,
+    "application": False,
+}

hr_timesheet_hide_folded_projects/views/hr_timesheet_views.xml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<odoo>
+    <record id="hr_timesheet_line_tree_hide_folded_projects" model="ir.ui.view">
+        <field name="name">hr.timesheet.line.tree.hide.folded.projects</field>
+        <field name="model">account.analytic.line</field>
+        <field name="inherit_id" ref="hr_timesheet.hr_timesheet_line_tree" />
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='project_id']" position="attributes">
+                <attribute name="domain">[('stage_id.fold', '=', False)]</attribute>
+                <attribute name="options">{'no_create': True}</attribute>
+            </xpath>
+        </field>
+    </record>
+</odoo>