Fix/mobile mood card sizing

[shri8977]

📝 Pull Request Summary

This PR improves the mobile experience of the mood selection UI by reducing the size of the mood cards and tightening the spacing between them. The change makes the grid more compact, helps users see more moods at once, and keeps the emoji labels readable on smaller screens.

🔗 Related Issue

Closes #279

🛠️ Type of Change

• 🎨 UI/UX Enhancement

📸 Screenshots (If applicable)

N/A

✅ Contributor Checklist

• I have tested my changes locally.
• My code follows the Apple-level design guidelines.
• I have updated the README if necessary.
• (Apertre 3.0) I have added relevant badges/labels.

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By submitting this PR, I agree to contribute my work under the MIT License.

Suggested PR title:

• style: reduce mood selection card size on mobile

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