🎨 Palette: Improve HUD readability and styling

[aidasofialily-cmd]

This PR introduces micro-UX improvements to the Speed Clicker game:

• Numeric Formatting: All scores (Personal Best, HUD, Final Score) now use thousand-separators (e.g., 1,000 instead of 1000) for better readability.
• Robust UI Updates: Replaced space-padding with the ANSI CLR_EOL (\033[K) sequence to ensure clean line updates regardless of content length.
• Visual Polish: HUD labels and values are now consistently styled with CLR_SCORE (Bold Cyan), and status indicators have explicit color resets to prevent bleed.
• Clean Transitions: Applied CLR_EOL to countdown sequences for a smoother start experience.

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PR created automatically by Jules for task 11753547522110875861 started by @aidasofialily-cmd

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