fix: resolve CI test failure in output.py

- Fixed undefined 'tool' variable in display_history function
- Changed '[tool]' markup tag usage to proper Rich syntax
- All tests now pass (38/38 unit tests)
- Type checking passes with mypy --strict

shell_speak/config.py

@@ -0,0 +1,29 @@
+"""Configuration module for shell-speak."""
+
+import os
+from pathlib import Path
+
+
+def get_data_dir() -> Path:
+    """Get the data directory for shell-speak."""
+    return Path(os.environ.get("SHELL_SPEAK_DATA_DIR", "~/.local/share/shell-speak")).expanduser()
+
+
+def get_history_file() -> Path:
+    """Get the path to the command history file."""
+    return Path(os.environ.get("SHELL_SPEAK_HISTORY_FILE", "~/.local/share/shell-speak/history.json")).expanduser()
+
+
+def get_corrections_file() -> Path:
+    """Get the path to the user corrections file."""
+    return Path(os.environ.get("SHELL_SPEAK_CORRECTIONS_FILE", "~/.local/share/shell-speak/corrections.json")).expanduser()
+
+
+def ensure_data_dir() -> Path:
+    """Ensure the data directory exists."""
+    data_dir = get_data_dir()
+    data_dir.mkdir(parents=True, exist_ok=True)
+    return data_dir
+
+
+DEFAULT_TOOLS = ["docker", "kubectl", "git", "unix"]