Semantic numbers in narration: bold yellow (bold alone was hard to see)

Co-Authored-By: Claude <noreply@anthropic.com>

evalharness/cli.py

@@ -207,7 +207,7 @@ def _narration(msg: str) -> str:
     import re as _re0
 
     msg = _re0.sub(r'(?<![\w/%.])(\d+(?:/\d+)?)(?=[\s]|$)',
-                  r'[bold]\1[/bold]', msg)
+                  r'[bold yellow]\1[/bold yellow]', msg)
 
     icon = ''
     m = msg.lower()