09.3 - Quiz Card View: Single Card + Flip (no swipe)

[uxbyweng]

Value proposition

As a user
I want to see one question at a time and flip for the answer,
so that I can focus and check myself without seeing all answers at once.

Description

In running mode, show exactly one flashcard, front side first. User can flip to reveal answer.

Acceptance criteria

• In status=running, only one card is visible at a time.
• Initially the question side is shown.
• Tap/click flips the card to show the answer.
• Tap/click again flips back to the question.
• Flip animation is smooth and consistent with existing card styling.

Tasks

• Create a feature branch feature/quiz-single-card-flip.
• Render current card using selectedCards[currentIndex].
• Implement flip state for the current card only.
• Ensure flip resets appropriately when moving to the next card.