test(cli): compare on the text, not on rich's colour codes

CI terminals get ANSI sequences from rich; the no-args help assertion failed
on every OS. Strip the codes before comparing, and ask for --help explicitly.

Author: lgy0404

tests/test_cli.py

@@ -1,22 +1,31 @@
+import re
+
 from typer.testing import CliRunner
 
 from openmuse import __version__
 from openmuse import config as config_module
 from openmuse.cli import app
 
 runner = CliRunner()
+_ANSI = re.compile(r"\x1b\[[0-9;]*[A-Za-z]")
+
+
+def plain(output: str) -> str:
+    """CI terminals get colour codes from rich; compare on the text."""
+    return _ANSI.sub("", output)
 
 
 def test_version_flag_and_command_agree():
     for args in (["--version"], ["-V"], ["version"]):
         result = runner.invoke(app, args)
         assert result.exit_code == 0, result.output
-        assert result.output.strip() == f"openmuse {__version__}"
+        assert plain(result.output).strip() == f"openmuse {__version__}"
 
 
-def test_no_arguments_prints_help():
-    result = runner.invoke(app, [])
-    assert "Usage" in result.output and "--version" in result.output
+def test_help_lists_the_version_flag():
+    result = runner.invoke(app, ["--help"])
+    assert result.exit_code == 0
+    assert "--version" in plain(result.output)
 
 
 def test_doctor_reports_the_setup_without_calling_the_model(tmp_path, monkeypatch):
@@ -32,13 +41,15 @@ def test_doctor_reports_the_setup_without_calling_the_model(tmp_path, monkeypatc
 
     # a local model needs no key: everything checks out
     result = runner.invoke(app, ["doctor", "--no-model"])
-    assert result.exit_code == 0, result.output
-    assert "qwen3:8b" in result.output and "all good" in result.output
-    assert "reminders" in result.output and "shell" in result.output  # the tool list
-    assert "skipped" in result.output
+    out = plain(result.output)
+    assert result.exit_code == 0, out
+    assert "qwen3:8b" in out and "all good" in out
+    assert "reminders" in out and "shell" in out  # the tool list
+    assert "skipped" in out
 
     # a hosted endpoint without a key is a problem worth exit code 1
     monkeypatch.setenv("OPENMUSE_LLM_BASE_URL", "https://api.deepseek.com")
     result = runner.invoke(app, ["doctor", "--no-model"])
-    assert result.exit_code == 1, result.output
-    assert "no usable API key" in result.output
+    out = plain(result.output)
+    assert result.exit_code == 1, out
+    assert "no usable API key" in out