Harden formatter preset normalization

caption_policy.py

@@ -77,7 +77,12 @@ def normalize_detail_level(value: str) -> str:
     return detail_policy.normalize_detail_level(value)
 
 
+def _choice_key(value: Any) -> str:
+    return str(value or "").strip().lower().replace("-", "_").replace(" ", "_")
+
+
 def normalize_style_policy(value: str) -> str:
+    value = _choice_key(value)
     return value if value in STYLE_POLICIES else "drop_style_tail"
 
 
@@ -90,6 +95,7 @@ def caption_profile_choices() -> list[str]:
 
 
 def normalize_caption_profile(value: str) -> str:
+    value = _choice_key(value)
     return value if value in CAPTION_PROFILES else CAPTION_PROFILE_DEFAULT