fix(AlertBadge): return type

[stephenjwatkins]

📝 Changes

• Fixes the return type in AlertBadge causing type errors in consumers with the added React 19 support

In React 19, ReactNode was expanded to include bigint and Promise. When a component returns children (typed as ReactNode) directly, TypeScript sees the return type as the full ReactNode union, which includes types that aren't assignable to what JSX expressions expect from a component. The consumer's React 18 types don't understand Promise or bigint as valid JSX return types, causing the mismatch.

[ralexmatthews]

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