🎨 Palette: Improve list row hit targets and VoiceOver support

[acebytes]

💡 What
Wrapped the main HStack inside CategoryRow and NodeModulesRow with a Button to drastically increase the clickable hit area. Used .contentShape(Rectangle()) to ensure the empty spacer areas are clickable, and added accessibilityElement(children: .combine) and accessibilityAddTraits to treat the row as a single screen-reader element rather than disjointed views.

🎯 Why
Previously, only the small checkbox icon on the left was clickable, forcing users to be overly precise when selecting items. Furthermore, VoiceOver would read the checkbox button and the text metadata as completely separate elements, cluttering navigation. This standardizes the row behavior to match Apple's expected list row paradigms.

📸 Before/After
(No visual changes, purely structural/interaction changes)

♿ Accessibility

• VoiceOver now combines the row text and state into a single element.
• Added .accessibilityAddTraits(.isSelected) so screen readers correctly announce the state.
• Hit target width increased from ~24px to the entire row width.

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PR created automatically by Jules for task 7799280668982570358 started by @acebytes

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