fix(paths): module-level default init so subprocess imports don't crash

tests/test_test_sandbox.py

@@ -181,14 +181,36 @@ def test_paths_runtime_refresh_atomic_swap(tmp_path) -> None:
 
 
 def test_paths_uninitialized_raises(tmp_path) -> None:
- """Calling a path getter before initialize_paths() raises RuntimeError
- (not silent fallback). This is the contract that enforces explicit init.
+ """After explicit paths.reset_paths() (i.e., user CLEARED the singleton
+ after a previous init), a getter raises RuntimeError. This is the
+ "bad programmer" detection — once cleared, you must re-init.
  [C: src/paths.py:_cfg]"""
  from src import paths
+ paths.initialize_paths(tmp_path / "dummy.toml")
  paths.reset_paths()
  with pytest.raises(RuntimeError, match="not initialized"):
   paths.get_logs_dir()
- paths.reset_paths()
+
+
+def test_paths_module_load_initializes_defaults(tmp_path) -> None:
+ """src/paths.py initializes _PATHS_CONFIG with defaults at module load.
+ This means subprocess imports that don't go through conftest.py (e.g.,
+ _run_in_subprocess tests) still have valid paths for any src/* module
+ that triggers a paths getter at import time (e.g., theme_2.load_themes).
+ [C: src/paths.py:_module_init_default]"""
+ import importlib
+ import src.paths as paths_module
+ # Reload to simulate fresh module load in subprocess
+ importlib.reload(paths_module)
+ # After module reload, defaults should be set
+ assert paths_module._PATHS_CONFIG is not None, (
+  "src.paths must initialize _PATHS_CONFIG at module load "
+  "so subprocess imports don't trigger 'paths not initialized' errors."
+ )
+ default_logs = paths_module._PATHS_CONFIG.logs_dir
+ assert default_logs.name == "sessions", (
+  f"default logs_dir should end in 'sessions'; got {default_logs}"
+ )
 
 
 def test_sloppy_py_parses_config_flag() -> None: