fix: use ANSI red for yolo indicator to improve readability

The yolo indicator used hardcoded bright yellow (#ffff00) which
is nearly invisible on light terminal backgrounds (e.g., Ghostty
light theme).

Switch to ANSI red which adapts to the terminal's color scheme
and provides good contrast on both light and dark backgrounds.
Red also better conveys the 'caution' semantics of yolo mode.

Fixes #1301

Author: Br1an67

src/kimi_cli/ui/shell/prompt.py

@@ -1567,7 +1567,7 @@ def _render_bottom_toolbar(self) -> FormattedText:
                 mode += f" ({', '.join(mode_details)})"
         status = self._status_provider()
         if status.yolo_enabled:
-            fragments.extend([("bold fg:#ffff00", "yolo"), ("", " " * 2)])
+            fragments.extend([("bold fg:ansired", "yolo"), ("", " " * 2)])
             columns -= len("yolo") + 2
         if status.plan_mode:
             fragments.extend([("bold fg:#00aaff", "plan"), ("", " " * 2)])