Add Visual Feedback to Settings Icon

[pbalduino]

Description

Enhance settings icon with tap feedback and animations

Priority

🟢 Low

Category

UI Polish

Details

• Add splash effect or ripple on settings icon tap
• Consider subtle scale animation on press
• Ensure feedback is consistent with app design
• Keep animation duration short and smooth

Files Affected

• lib/screens/tuner_screen.dart

Acceptance Criteria

• Settings icon provides visual feedback when tapped
• Animation is smooth and not distracting
• Feedback is consistent with Flutter design patterns
• No impact on navigation performance

Task ID: UI-002