🎨 Palette: Add accessibility combine to empty state in ContentView.swift

[acebytes]

💡 What: Added .accessibilityElement(children: .combine) to the emptyState VStack in ContentView.swift.
🎯 Why: To ensure VoiceOver reads the empty state's icon, title, and description as a single, unified message instead of disjointed fragments.
📸 Before/After: Before, VoiceOver read the empty state as multiple separate elements. After, it reads it cohesively.
♿ Accessibility: Improves screen reader experience by combining related text components into a single element.

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PR created automatically by Jules for task 5228882769234101875 started by @acebytes

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