fix: resolve CI linting and type checking issues

app/tests/test_config.py

@@ -0,0 +1,21 @@
+import pytest
+from cmdparse.config import find_config_file, load_config, get_builtin_config_path
+
+
+def test_find_config_file_nonexistent():
+    """Test finding config file when none exists."""
+    result = find_config_file('/nonexistent/path.yaml')
+    assert result is None
+
+
+def test_load_config_nonexistent():
+    """Test loading config when file doesn't exist."""
+    result = load_config('/nonexistent/path.yaml')
+    assert result == {'parsers': []}
+
+
+def test_get_builtin_config_path():
+    """Test getting built-in config path."""
+    path = get_builtin_config_path()
+    assert 'config' in str(path)
+    assert 'default_parsers.yaml' in str(path)