Fix frontend tests

[FelixMalfait]

Fix a few broken tests

[greptile-apps]

PR Summary

The pull request addresses broken frontend tests by making syntax adjustments, modifying error handling types, and updating mock data.

• Toggle.tsx: Added parentheses around a ternary operation in the styled component definition to ensure proper evaluation order.
• apollo.factory.ts: Changed onError callback type from GraphQLFormattedError to readonly GraphQLFormattedError[] to handle multiple errors.
• metadata.ts: Updated the id field of a priority option from '3' to '6f6e1421-8a42-4d4a-bf76-465b5f84b6d2' to align mock data with test expectations.

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