09.8 - Quiz Summary: Statistics + Restart

[uxbyweng]

Value proposition

As a user
I want to see my quiz results and restart,
so that I can evaluate my performance and try again.

Description

At the end of the quiz, show a summary screen with stats and a restart action.

Acceptance criteria

• When quiz finishes (status=finished), show summary screen instead of cards.
• Summary includes:
  • total cards
  • correct count
  • wrong count
  • accuracy (%)
  • total time
  • average time per card
• “Restart” resets session to setup (status=idle) and clears counters/timer. -> to be clarified: how the user wants to restart (just the same quiz, or only wrong answered cards, ...)

Tasks

• Create a feature branch feature/quiz-summary.
• Implement summary UI component.
• Compute statistics from session state.
• Implement restart logic.