🎨 Palette: Make list rows fully clickable with better VoiceOver support

[acebytes]

💡 What: Expanded the clickable hit target of list rows (CategoryRow and NodeModulesRow) to encompass the entire width of the row rather than just the selection checkbox, and unified their VoiceOver announcements.
🎯 Why: Users had to precisely tap a small circular checkbox to select an item. By wrapping the entire row in a Button with a rectangular content shape, the interaction feels significantly smoother and native.
📸 Before/After: Visually identical, interaction area expanded from ~24x24pt to full row width.
♿ Accessibility: Added .accessibilityElement(children: .combine) and tied .accessibilityAddTraits(.isSelected) to the check state so that screen readers correctly announce the entire row's context and its current toggle status as a single interactive element, preventing fragmented navigation.

Also added a critical learning to .jules/palette.md detailing this SwiftUI-specific behavior.

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PR created automatically by Jules for task 17121227047300471241 started by @acebytes

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