fix(@emotion/primitives-core): skip style and ref when finalTag is React.Fragment

[phthhieu]

What:

Prevent style and ref props from being forwarded to React.Fragment inside @emotion/primitives-core's styled component render path.

Why:

React.Fragment only accepts key and children as props. When a styled component resolves to React.Fragment — either via styled(React.Fragment)\...`or theas={React.Fragment}shorthand — the code increateStyledunconditionally assignednewProps.style = [computedStyles, props.style]before callingReact.createElement(finalTag, newProps). This passed an invalid style` prop to the Fragment.

React Native 0.81+ (and React Native 0.78+ per some reports) added strict prop validation that surfaces this as a runtime error:

"Invalid prop style supplied to React.Fragment. React.Fragment can only have key and children props."

Fixes #3359.

How:

Guard the style and ref assignments with if (finalTag !== React.Fragment) so those props are only added when the target element is capable of accepting them.

- newProps.style = [css.apply(mergedProps, styles), props.style]
- if (ref) {
-   newProps.ref = ref
- }
+ if (finalTag !== React.Fragment) {
+   newProps.style = [css.apply(mergedProps, styles), props.style]
+   if (ref) {
+     newProps.ref = ref
+   }
+ }

Checklist:

• Documentation N/A
• Tests
• Code complete
• Changeset

🤖 Generated with Claude Code | Session: ffa7459a-75f5-425f-8eb4-d23918b2eaf9

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[phthhieu]

Note on CI failures: The yarn test:typescript (dtslint) failures affect all packages uniformly — including ones this PR never touches (@emotion/cache, @emotion/hash, @emotion/memoize, etc.). The errors are:

error TS5101: Option 'baseUrl' is deprecated and will stop functioning in TypeScript 7.0.
error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0.

These are pre-existing on main — every recent commit on main has a failing CI run (example). This PR does not introduce them.