Improve code quality

[ShootingStar91]

Use refs for managing focus in frontend edit: Benefit is questionable

[ShootingStar91]

Divide components into smaller ones

[ShootingStar91]

Error handling in axios interceptor? Could possibly also dispatch error toast from there as well

[ShootingStar91]

Types to same place

[ShootingStar91]

Common logic in practice modes should use same code for example

• check correct answer
• get new word
• handle form logic
• handle field coloring etc