Build a React widget that converts temperature values between Celsius and Fahrenheit.

Requirements:

1. Render two number inputs: one for Celsius and one for Fahrenheit.
2. Updating one input should automatically update the other.
3. Use the conversion formulas:
   • Celsius to Fahrenheit: (C × 9/5) + 32
   • Fahrenheit to Celsius: (F − 32) × 5/9
4. Prevent infinite loops when updating both fields.
5. Focus on functionality over styling.
6. The component should work out-of-the-box in a live React preview (e.g., CodeSandbox/Sandpack).