Bump version to 0.1.2; update logging paths and enhance CLI with version command

tests/test_cli.py

@@ -4,6 +4,7 @@ import json
 import shutil
 from pathlib import Path
 
+from nexus_claude_api import __version__
 from nexus_claude_api.cli import main
 from nexus_claude_api.config import (
     Settings,
@@ -62,6 +63,38 @@ def test_missing_api_key_fails(monkeypatch) -> None:
     assert exit_code == 2
 
 
+def test_version_prints_package_version(capsys) -> None:
+    try:
+        main(["--version"])
+    except SystemExit as exc:
+        assert exc.code == 0
+
+    output = capsys.readouterr()
+    assert output.out.strip() == f"nexus-claude-api {__version__}"
+
+
+def test_invalid_user_config_returns_clean_error(monkeypatch, capsys) -> None:
+    tmp_path = _workspace_tmp("invalid-user-config")
+    user_config = tmp_path / ".config" / "nexus-claude-api" / "config.json"
+    user_config.parent.mkdir(parents=True, exist_ok=True)
+    user_config.write_text("{not json", encoding="utf-8")
+    monkeypatch.setattr("nexus_claude_api.config.USER_CONFIG_FILE", user_config)
+    monkeypatch.delenv("NEXUS_API_KEY", raising=False)
+    monkeypatch.delenv("AWS_BEARER_TOKEN_BEDROCK", raising=False)
+    monkeypatch.chdir(tmp_path)
+
+    try:
+        exit_code = main(["start", "--dry-run"])
+    finally:
+        monkeypatch.chdir(Path(__file__).parents[1])
+        shutil.rmtree(tmp_path, ignore_errors=True)
+
+    output = capsys.readouterr()
+    assert exit_code == 2
+    assert "Invalid configuration: Invalid JSON" in output.err
+    assert "Traceback" not in output.err
+
+
 def test_user_config_api_key(monkeypatch) -> None:
     tmp_path = _workspace_tmp("user-config")
     user_config = tmp_path / ".config" / "nexus-claude-api" / "config.json"