🎨 Palette: Enhance score readability and achievement feedback

[aidasofialily-cmd]

This PR introduces a micro-UX improvement to the "Speed Clicker" game by enhancing how scores and achievements are presented.

💡 What: The UX enhancement added

1. Numeric Formatting: Large scores are now formatted with thousands separators (e.g., 1,000,000 instead of 1000000).
2. Contextual Achievement Feedback: When a player breaks their personal best, the notification now shows what the previous record was: ✨ NEW BEST! 🥳 (was 1,000).
3. Visual Polish: Added emojis and bold yellow highlighting (CLR_CTRL) to achievement messages.

🎯 Why: The user problem it solves

• Readability: Raw large integers are hard to read at a glance in a fast-paced game.
• Context: Players often forget their exact previous high score, so showing the "was X" value makes the new achievement feel more rewarding and concrete.

♿ Accessibility

• Increased visual hierarchy for important game events (new bests).
• Improved information density and clarity through better number formatting.

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PR created automatically by Jules for task 9929940778384288365 started by @aidasofialily-cmd

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