test: fix test_IdeationConfigManager_default_values path comparison

Use string comparison instead of resolve() for path comparison.
On Windows, /tmp/test resolves to D:/tmp/test, and on macOS /tmp/test
resolves to /private/tmp/test, but the implementation stores paths
as-is without resolving.

tests/ideation/test_config.py

@@ -64,8 +64,8 @@ def test_IdeationConfigManager_default_values(mock_init):
 
         config = IdeationConfigManager(project_dir=project_dir)
 
-        # Use resolve() for cross-platform compatibility (macOS /tmp -> /private/tmp)
-        assert config.project_dir == project_dir.resolve()
+        # Compare paths without resolve() since the implementation stores paths as-is
+        assert str(config.project_dir) == str(project_dir)
         assert config.model == "sonnet"
         assert config.thinking_level == "medium"
         assert config.refresh is False