🎨 Palette: [UX improvement] Fix trailing text artifacts with ANSI Erase in Line

[EiJackGH]

💡 What: Replaced hardcoded padding spaces with the ANSI Erase in Line sequence (\033[K) after dynamic carriage return (\r) line updates.
🎯 Why: Prevents brittle trailing text artifacts when a new CLI string is shorter than the old one, resulting in a cleaner and more robust interface layout.
📸 Before/After: N/A
♿ Accessibility: Improves visual clarity of dynamic CLI elements.

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PR created automatically by Jules for task 4341122783861923084 started by @EiJackGH

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