Button crashes on iOS: cursor: 'pointer' on internal Text triggers RCTTextView setCursor

Bug Description

Tamagui's Button component sets cursor: 'pointer' on its internal Text component (line 140 in src/Button.tsx), which causes a crash on iOS when using React Native.

Error:

-[RCTTextView setCursor:]: unrecognized selector sent to instance

The cursor CSS property is not supported on React Native's Text component on iOS — it crashes RCTTextView. This is a known React Native issue: facebook/react-native#44559.

The cursor: 'pointer' on the Frame (View) does not crash — only the one on the internal Text component.

Reproduction

import { Button } from 'tamagui';

// This crashes on iOS
<Button>Save</Button>

Environment:

• Tamagui: 2.0.0-rc.41
• React Native: 0.81.5
• Platform: iOS (device and simulator)

Root Cause

In packages/button/src/Button.tsx, the internal Text component has:

const Text = styled(SizableText, {
  context,
  variants: {
    unstyled: {
      false: {
        userSelect: 'none',
        cursor: 'pointer',  // <-- crashes RCTTextView on iOS
        flexGrow: 0,
        flexShrink: 1,
        ellipsis: true,
        color: '$color',
      },
    },
  } as const,
  // ...
})

cursor is a web-only CSS property. React Native's View silently ignores it, but Text (backed by RCTTextView) throws an unrecognized selector error.

Proposed Fix

Platform-guard the cursor property so it only applies on web:

const Text = styled(SizableText, {
  context,
  variants: {
    unstyled: {
      false: {
        userSelect: 'none',
        flexGrow: 0,
        flexShrink: 1,
        ellipsis: true,
        color: '$color',

        '$platform-web': {
          cursor: 'pointer',
        },
      },
    },
  } as const,
})

The same guard should be applied to cursor: 'pointer' on the Frame (line 47) for consistency, though the Frame doesn't crash since View ignores unknown style props.

Happy to submit a PR if this approach looks right.