🎨 Palette: Instant feedback & dynamic poll timeout

[aidasofialily-cmd]

Implemented a micro-UX improvement for the SPEED CLICKER game.
The changes include:

1. Instant Visual Feedback: The score and mode status now update immediately when a key is pressed, rather than waiting for the next game tick.
2. Stable CLI UI: Replaced line-breaking messages with in-place updates using \r, keeping the game interface clean and focused.
3. Performance & Responsiveness: Refactored the game loop to use poll() with a dynamic timeout, which is more efficient and responsive than a non-blocking poll with a fixed sleep.
4. Visual Polish: Added the 🔥 emoji and clearer mode labels to enhance the user experience.
5. Robustness: Used explicit casting in std::max to prevent potential compilation errors in different C++ environments.

♿ Accessibility/UX:

• Instant feedback makes the "clicker" aspect feel much more satisfying.
• The stable UI prevents terminal clutter, making it easier to track progress.

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PR created automatically by Jules for task 2862080965914083619 started by @aidasofialily-cmd

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