fix: resolve NameError crash at startup by defining argv before use

tests/test_help_docs.py

@@ -1,18 +1,24 @@
 from __future__ import annotations
 
+import importlib
 from types import SimpleNamespace
 
 from trushell.commands.core import run_help
 
 
 def test_run_help_prints_docstring_for_known_command(monkeypatch, capsys):
+    def _fake_import_module(path: str):
+        module = importlib.import_module(path.replace("/", ".").removesuffix(".py"))
+        return module
+
     fake_kernel = SimpleNamespace(
         registry={
             "settings": {
                 "path": "trushell/commands/settings.py",
                 "function": "run_settings",
             }
-        }
+        },
+        _import_module=_fake_import_module,
     )
 
     monkeypatch.setattr("trushell.core.trukernel.get_kernel", lambda: fake_kernel)

trushell/cli.py

@@ -26,11 +26,11 @@
 
 def app_with_lower() -> None:
     """Entry point that normalizes the first argument to lowercase for case-insensitive invocation."""
-    if len(sys.argv) > 1:
-        # Create a local copy to avoid mutating the global sys.argv
-        argv_copy = sys.argv.copy()
-        if argv_copy[1].lower() not in {"--help", "-h", "version"}:
-            raw = " ".join(argv_copy[1:])
+    # Create a local copy to avoid mutating the global sys.argv
+    argv = sys.argv.copy()
+    if len(argv) > 1:
+        if argv[1].lower() not in {"--help", "-h", "version"}:
+            raw = " ".join(argv[1:]).lower()
             get_kernel().execute_command(raw)
             return