Stop invalidating sudo timestamp on mode exit

tests/test_manager.py

@@ -12,6 +12,7 @@ from pathlib import Path
 from unittest.mock import Mock, patch
 from src.hosts.core.manager import PermissionManager, HostsManager
 from src.hosts.core.models import HostEntry, HostsFile
+from src.hosts.core.commands import ToggleEntryCommand
 
 
 class TestPermissionManager:
@@ -183,32 +184,17 @@ class TestPermissionManager:
         assert not result
 
     @patch("subprocess.run")
-    def test_release_sudo(self, mock_run):
-        """Test releasing sudo permissions."""
+    def test_clear_permission_state_preserves_global_sudo_timestamp(self, mock_run):
+        """Test exiting Privileged Mode preserves the global sudo timestamp."""
         pm = PermissionManager()
         pm.has_sudo = True
         pm._sudo_validated = True
 
-        pm.release_sudo()
+        pm.clear_permission_state()
 
         assert not pm.has_sudo
         assert not pm._sudo_validated
-        mock_run.assert_called_once_with(["sudo", "-k"], capture_output=True, timeout=5)
-
-    @patch("subprocess.run")
-    def test_release_sudo_exception(self, mock_run):
-        """Test releasing sudo with exception."""
-        mock_run.side_effect = Exception("Test error")
-
-        pm = PermissionManager()
-        pm.has_sudo = True
-        pm._sudo_validated = True
-
-        pm.release_sudo()
-
-        # Should still reset state even if command fails
-        assert not pm.has_sudo
-        assert not pm._sudo_validated
+        mock_run.assert_not_called()
 
 
 class TestHostsManager:
@@ -306,14 +292,25 @@ class TestHostsManager:
             assert not manager.edit_mode
 
     def test_exit_edit_mode_success(self):
-        """Test exiting edit mode successfully."""
+        """Test exit clears the Privileged Mode session state."""
         with tempfile.NamedTemporaryFile() as temp_file:
             manager = HostsManager(temp_file.name)
             manager.edit_mode = True
             manager._backup_path = Path("/tmp/backup")
+            hosts_file = HostsFile(
+                entries=[
+                    HostEntry("192.0.2.1", ["example.test"]),
+                    HostEntry("192.0.2.2", ["example-two.test"]),
+                ]
+            )
+            manager.undo_redo_history.execute_command(ToggleEntryCommand(0), hosts_file)
+            manager.undo_redo_history.execute_command(ToggleEntryCommand(1), hosts_file)
+            manager.undo_redo_history.undo(hosts_file)
+            assert manager.can_undo()
+            assert manager.can_redo()
 
             # Mock permission manager
-            manager.permission_manager.release_sudo = Mock()
+            manager.permission_manager.clear_permission_state = Mock()
 
             success, message = manager.exit_edit_mode()
 
@@ -321,7 +318,9 @@ class TestHostsManager:
             assert "disabled" in message
             assert not manager.edit_mode
             assert manager._backup_path is None
-            manager.permission_manager.release_sudo.assert_called_once()
+            assert not manager.can_undo()
+            assert not manager.can_redo()
+            manager.permission_manager.clear_permission_state.assert_called_once()
 
     def test_exit_edit_mode_not_in_edit(self):
         """Test exiting edit mode when not in edit mode."""
@@ -341,7 +340,7 @@ class TestHostsManager:
             manager.edit_mode = True
 
             # Mock permission manager to raise exception
-            manager.permission_manager.release_sudo = Mock(
+            manager.permission_manager.clear_permission_state = Mock(
                 side_effect=Exception("Test error")
             )