fix(proxy-client): исправлено восстановление установки службы

Заданы права системных каталогов независимо от umask, добавлен журнал незавершённой установки и исправлена подсказка прав профиля. Проверены явные флаги systemd через подставные API ОС.

Проверка: 72 теста на Python 3.8 и 3.14, оба shell-набора. Настоящий boot/systemd остаётся непроверенным.

tests/test_proxy_profiles_service.py

@@ -101,3 +101,112 @@ class ProfilesServiceTest(unittest.TestCase):
         result = self.cli(*self.install_args())
         self.assertEqual(0, result.returncode, result.stderr)
         self.assertIn('Storage не задан', result.stdout)
+
+    def test_restrictive_umask_keeps_service_executable_accessible(self):
+        args = self.install_args()
+        result = subprocess.run(['bash', '-c', 'umask 077; exec "$@"', 'bash',
+                                 str(CLI), *map(str, args)], env=self.env,
+                                capture_output=True, text=True, timeout=15)
+        self.assertEqual(0, result.returncode, result.stderr)
+        stage = self.root / 'stage'
+        for name in ('usr', 'usr/local', 'usr/local/lib', 'usr/local/lib/proxy-client'):
+            self.assertEqual(0o755, (stage / name).stat().st_mode & 0o777, name)
+
+    def test_interrupted_install_or_update_can_be_retried(self):
+        args = self.install_args()
+        injection = self.root / 'fault'
+        injection.mkdir()
+        (injection / 'sitecustomize.py').write_text(
+            'import os, errno\noriginal = os.replace\n'
+            'def replace(src, dst):\n'
+            '    if str(dst).endswith("/xray"):\n'
+            '        raise OSError(errno.ENOSPC, "synthetic disk full")\n'
+            '    return original(src, dst)\n'
+            'os.replace = replace\n')
+        candidate = self.root / 'new-cli'
+        candidate.write_bytes(CLI.read_bytes() + b'\n# next release\n')
+        candidate.chmod(0o755)
+        for updating in (False, True):
+            with self.subTest(updating=updating):
+                args[-1] = self.root / ('update' if updating else 'fresh')
+                if updating:
+                    result = self.cli(*args)
+                    self.assertEqual(0, result.returncode, result.stderr)
+                command = [str(candidate), *map(str, args)]
+                failed = subprocess.run(command, env=dict(self.env, PYTHONPATH=str(injection)),
+                                        capture_output=True, text=True, timeout=15)
+                self.assertNotEqual(0, failed.returncode)
+                retried = subprocess.run(command, env=self.env, capture_output=True,
+                                         text=True, timeout=15)
+                self.assertEqual(0, retried.returncode, retried.stderr)
+
+    def test_system_actions_require_explicit_flags(self):
+        args = self.install_args()[:-2]
+        stage = self.root / 'system'
+        fake = self.root / 'system-api'
+        fake.mkdir()
+        log = self.root / 'actions'
+        # Подмена только ОС: корень файловой системы, root/group API и
+        # внешние systemd-команды. CLI и установщик выполняются целиком.
+        (fake / 'sitecustomize.py').write_text('''
+import os, pathlib, grp, types
+stage = os.environ['TEST_INSTALL_ROOT']
+OriginalPath = type(pathlib.Path())
+class StagedPath:
+    def __new__(cls, *parts, **kwargs):
+        if parts == ('/',):
+            parts = (stage,)
+        return OriginalPath(*parts, **kwargs)
+pathlib.Path = StagedPath
+os.geteuid = lambda: 0
+def group(name):
+    assert os.path.exists(os.environ['TEST_INSTALL_ROOT'] + '/group-created')
+    return types.SimpleNamespace(gr_gid=os.getgid())
+grp.getgrnam = group
+def chown(path, uid, gid):
+    assert str(path).startswith(stage + '/')
+    assert os.path.exists(stage + '/group-created')
+    with open(os.environ['TEST_ACTION_LOG'], 'a') as stream:
+        stream.write('chown ' + os.path.basename(path) + '\\n')
+os.chown = chown
+''')
+        for command in ('systemd-sysusers', 'systemctl'):
+            path = fake / command
+            path.write_text('#!/bin/sh\n'
+                            'printf "%s %s\\n" "${0##*/}" "$*" >> "$TEST_ACTION_LOG"\n'
+                            'if [ "${0##*/}" = systemd-sysusers ]; then\n'
+                            '  touch "$TEST_INSTALL_ROOT/group-created"\nfi\n')
+            path.chmod(0o755)
+        env = dict(self.env, PYTHONPATH=str(fake), TEST_INSTALL_ROOT=str(stage),
+                   TEST_ACTION_LOG=str(log), PATH=str(fake) + ':' + os.environ['PATH'])
+        for flags in ([], ['--enable'], ['--start'], ['--enable', '--start']):
+            with self.subTest(flags=flags):
+                log.write_text('')
+                result = subprocess.run([str(CLI), *map(str, args), *flags], env=env,
+                                        capture_output=True, text=True, timeout=15)
+                self.assertEqual(0, result.returncode, result.stderr)
+                calls = log.read_text().splitlines()
+                self.assertTrue(calls[0].startswith('systemd-sysusers '), calls)
+                self.assertEqual(['chown proxy-client', 'chown config', 'chown default.url'], calls[1:4])
+                self.assertIn('systemctl daemon-reload', calls)
+                self.assertEqual('--enable' in flags, 'systemctl enable proxy-client.service' in calls)
+                self.assertEqual('--start' in flags, 'systemctl start proxy-client.service' in calls)
+                self.assertFalse(any('restart' in call for call in calls))
+
+    def test_invalid_service_requests_do_not_install_files(self):
+        args = self.install_args()
+        for extra in (['--enable'], ['--start']):
+            result = self.cli(*args, *extra)
+            self.assertNotEqual(0, result.returncode)
+            self.assertFalse((self.root / 'stage').exists())
+        result = self.cli('--profile', 'work', *args)
+        self.assertNotEqual(0, result.returncode)
+        self.assertFalse((self.root / 'stage').exists())
+        config = self.root / 'source/config'
+        original = config.read_text()
+        for invalid in (original.replace('type=xray', 'type=external'),
+                        original.replace('127.0.0.1', '192.0.2.1')):
+            config.write_text(invalid)
+            result = self.cli(*args)
+            self.assertNotEqual(0, result.returncode)
+            self.assertFalse((self.root / 'stage').exists())