chore: simplify load/store types in tooltips
Use Simplify<T> and & {} to force TypeScript to eagerly evaluate
mapped types, showing { x: number; y: number } instead of
FieldValues<{ x: Int32; y: Int32 }> in IDE tooltips.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>