Convert React components from JSX to TSX

[fabiovincenzi]

Is your feature request related to a problem? Please describe.
Tracking issue to convert all React frontend components from JSX to TSX, ensuring full TypeScript support on the client side.
Currently, our React components are written in plain JSX (*.js/.jsx) and are not type-checked by TypeScript.

Describe the solution you'd like
Convert all React components to .tsx, add TypeScript typings.

Describe alternatives you've considered
None.

Additional context
Proxy TypeScript conversion completed in PR #960.