Add proper type checking for block.content.columnAlignments in BlockPreviewRenderer

Shipped

October 2, 2025 at 2:16 AM UTC

Author

kamo

Commit

f7356cf

- Replace direct property access with 'in' operator type guards for columnAlignments - Ensures TypeScript knows the content has columnAlignments property before accessing - Fixes both header and cell column alignment access - Resolves TypeScript compilation error preventing build