🎨 Palette: Add .accessibilityElement(children: .combine) to emptyState in ContentView.swift

[acebytes]

💡 What: Added .accessibilityElement(children: .combine) to the emptyState view.
🎯 Why: To ensure VoiceOver reads the empty state as a single unified message rather than disjointed fragments, improving the reading experience.
📸 Before/After: N/A (Non-visual change).
♿ Accessibility: Combines the text and image of the empty state into one cohesive VoiceOver announcement.

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PR created automatically by Jules for task 16815633241297658643 started by @acebytes

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