chore(repo): baseline du fork input-remapper (upstream v2.2.1)

Le dépôt ne contenait que README.md ; ajout de l'intégralité du code
fonctionnel du fork comme socle stable de la branche de release.
L'état runtime d'orchestration (.ideai/) est exclu du suivi.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/unit/test_user.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# input-remapper - GUI for device specific keyboard mappings
+# Copyright (C) 2025 sezanzeb <b8x45ygc9@mozmail.com>
+#
+# This file is part of input-remapper.
+#
+# input-remapper is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# input-remapper is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with input-remapper.  If not, see <https://www.gnu.org/licenses/>.
+
+
+import os
+import unittest
+from unittest import mock
+
+from inputremapper.user import UserUtils
+from tests.lib.test_setup import test_setup
+
+
+def _raise(error):
+    raise error
+
+
+@test_setup
+class TestUser(unittest.TestCase):
+    def test_get_user(self):
+        with mock.patch("os.getlogin", lambda: "foo"):
+            self.assertEqual(UserUtils.get_user(), "foo")
+
+        with mock.patch("os.getlogin", lambda: "root"):
+            self.assertEqual(UserUtils.get_user(), "root")
+
+        property_mock = mock.Mock()
+        property_mock.configure_mock(pw_name="quix")
+        with (
+            mock.patch("os.getlogin", lambda: _raise(OSError())),
+            mock.patch("pwd.getpwuid", return_value=property_mock),
+        ):
+            os.environ["USER"] = "root"
+            os.environ["SUDO_USER"] = "qux"
+            self.assertEqual(UserUtils.get_user(), "qux")
+
+            os.environ["USER"] = "root"
+            del os.environ["SUDO_USER"]
+            os.environ["PKEXEC_UID"] = "1000"
+            self.assertNotEqual(UserUtils.get_user(), "root")
+
+    def test_get_home(self):
+        property_mock = mock.Mock()
+        property_mock.configure_mock(pw_dir="/custom/home/foo")
+        with mock.patch("pwd.getpwnam", return_value=property_mock):
+            self.assertEqual(UserUtils.get_home("foo"), "/custom/home/foo")