🎨 Palette: Highlight 'NEW BEST!' achievement in terminal UI

[aidasofialily-cmd]

🎨 Palette: Highlight 'NEW BEST!' achievement in terminal UI

💡 What:

• Added CLR_CTRL (bold yellow styling) and a sparkle emoji (✨) to the NEW BEST! high score notification.
• Added explicit CLR_RESET escape sequences after the game mode indicator ([HARD MODE] / [NORMAL MODE]) and the achievement message.

🎯 Why:

• Enhances visual hierarchy and celebratory feedback when players achieve a personal best.
• Fixes ANSI escape code style leakage across in-place terminal redraws (\r).

♿ Accessibility & Visual Polish:

• High-contrast bold yellow text highlights the milestone accomplishment instantly.
• Proper ANSI reset guarantees consistent rendering regardless of terminal type or state changes.

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PR created automatically by Jules for task 4035630750012900478 started by @aidasofialily-cmd

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