test(auto-tuning): strip ANSI from Typer --help output (v0.32.0 follow-up)

Rich/Typer emits per-character ANSI escapes in CI on Linux runners
("--\x1b[m-find\x1b[m-lr") so the raw substring assertion `--find-lr`
in result.output fails on ubuntu-latest x py3.12 even though it
passes on Windows where Rich auto-disables colour.

Strip ANSI before comparing — same pattern already used by
test_hf_integration.py and test_eval_platform.py.

Tests-only commit, no version bump.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/test_auto_tuning.py

@@ -14,6 +14,7 @@ from __future__ import annotations
 
 import json
 import math
+import re
 from pathlib import Path
 
 import pytest
@@ -21,6 +22,17 @@ import yaml
 from pydantic import ValidationError
 from typer.testing import CliRunner
 
+# Rich/Typer emits per-character ANSI escapes in CI ("--\x1b[m-find\x1b[m-lr"),
+# so substring assertions on the raw `result.output` fail on Linux runners
+# even though they pass on Windows where Rich auto-disables colour. Strip
+# escapes before comparing — same pattern used by test_hf_integration.py
+# and test_eval_platform.py.
+_ANSI_RE = re.compile(r"\x1b\[[0-9;]*m")
+
+
+def _strip_ansi(text: str) -> str:
+    return _ANSI_RE.sub("", text)
+
 # --------------------------------------------------------------------------- #
 # Part A — LR range finder                                                    #
 # --------------------------------------------------------------------------- #
@@ -164,7 +176,7 @@ class TestLRFinderCLI:
         runner = CliRunner()
         result = runner.invoke(app, ["train", "--help"])
         assert result.exit_code == 0, (result.output, repr(result.exception))
-        assert "--find-lr" in result.output
+        assert "--find-lr" in _strip_ansi(result.output)
 
 
 # --------------------------------------------------------------------------- #