fix dark mode gradient

[pvicensSpacedev]

Summary of Changes

Fixed gradient for long mobile posts

Demo or Before/After Pics

Edge Cases

List any common edge cases that you have considered and tested.

Testing Steps

Provide steps on how the reviewer can test the changes.

Checklist

Please make sure to review and check all of the following:

• I've tested the changes and all tests pass.
• (if web) I've tested the changes on various desktop screen sizes to ensure responsiveness.
• (if mobile) I've tested the changes on both light and dark modes.

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Name	Status	Preview	Comments	Updated (UTC)
gallery	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Apr 8, 2024 8:33pm

[github-actions]

Bundle Sizes

Compared against cc0f4c0

Route: No significant changes found

Dynamic import: No significant changes found

[Robinnnnn]

could we put this in a useMemo? arrays and objects in JS will be recomputed in react unless memoized

better yet could we do something like this:

// mobile/src/hooks/useGradientColorScheme.ts
export function useGradientColorScheme() {
  const { colorScheme } = useColorScheme();
  return useMemo(() => colorScheme === 'dark' ? ['rgba(0, 0, 0, 0)', 'rgba(0, 0, 0, 1)'] : ['rgba(255, 255, 255, 0)', 'rgba(255, 255, 255, 1)'], [colorScheme])
}