- Add GameSetup component with Duolingo-style button selectors for
language pair, POS, difficulty, and rounds
- Language swap: selecting the same language for source and target
automatically swaps them instead of allowing duplicates
- Add selection-before-submission flow: user clicks an option to
highlight it, then confirms with a Submit button to prevent misclicks
- Add selected state to OptionButton (purple ring highlight)
- Play Again on score screen returns to settings instead of
auto-restarting with the same configuration
- Remove hardcoded GAME_SETTINGS, game configuration is now user-driven
- Add Vite proxy for /api → localhost:3000 (no CORS needed in dev)
- Create /play route with hardcoded game settings (en→it, nouns, easy)
- Three-phase state machine: loading → playing → finished
- Show prompt, optional gloss, and 4 answer buttons per question
- Submit answers to /api/v1/game/answer, show correct/wrong feedback
- Manual Next button to advance after answering
- Score screen on completion
- Add selectedOptionId to AnswerResult schema (discovered during
frontend work that the result needs to be self-contained for
rendering feedback without separate client state)
Intentionally unstyled — component extraction and polish come next.
