feat: Enhance Game component with extra puzzles feature

- Introduce requiredDailyKeys to track daily puzzle completion across genres.
- Implement logic to show an ExtraPuzzlesPopover when all daily puzzles are completed.
- Add localized messages for extra puzzles in both English and German.
- Update GenrePage and Home components to pass requiredDailyKeys to the Game component.

components/Game.tsx

@@ -6,7 +6,12 @@ import { useTranslations, useLocale } from 'next-intl';
 import AudioPlayer, { AudioPlayerRef } from './AudioPlayer';
 import GuessInput from './GuessInput';
 import Statistics from './Statistics';
+import ExtraPuzzlesPopover from './ExtraPuzzlesPopover';
 import { useGameState } from '../lib/gameState';
+import { getGenreKey } from '@/lib/playerStorage';
+import type { ExternalPuzzle } from '@/lib/externalPuzzles';
+import { getRandomExternalPuzzle } from '@/lib/externalPuzzles';
+import { hasPlayedAllDailyPuzzlesForToday, hasSeenExtraPuzzlesPopoverToday, markDailyPuzzlePlayedToday, markExtraPuzzlesPopoverShownToday } from '@/lib/extraPuzzlesTracker';
 import { sendGotifyNotification, submitRating } from '../app/actions';
 
 // Plausible Analytics
@@ -32,11 +37,14 @@ interface GameProps {
     isSpecial?: boolean;
     maxAttempts?: number;
     unlockSteps?: number[];
+    // List of genre keys that zusammen alle Tagesrätsel des Tages repräsentieren (z. B. ['global', 'Rock', 'Pop']).
+    // Wird genutzt, um zu prüfen, ob der Spieler alle Tagesrätsel gespielt hat.
+    requiredDailyKeys?: string[];
 }
 
 const DEFAULT_UNLOCK_STEPS = [2, 4, 7, 11, 16, 30, 60];
 
-export default function Game({ dailyPuzzle, genre = null, isSpecial = false, maxAttempts = 7, unlockSteps = DEFAULT_UNLOCK_STEPS }: GameProps) {
+export default function Game({ dailyPuzzle, genre = null, isSpecial = false, maxAttempts = 7, unlockSteps = DEFAULT_UNLOCK_STEPS, requiredDailyKeys }: GameProps) {
     const t = useTranslations('Game');
     const locale = useLocale();
     const { gameState, statistics, addGuess, giveUp, addReplay, addYearBonus, skipYearBonus } = useGameState(genre, maxAttempts, isSpecial);
@@ -49,6 +57,8 @@ export default function Game({ dailyPuzzle, genre = null, isSpecial = false, max
     const [hasRated, setHasRated] = useState(false);
     const [showYearModal, setShowYearModal] = useState(false);
     const [hasPlayedAudio, setHasPlayedAudio] = useState(false);
+    const [showExtraPuzzlesPopover, setShowExtraPuzzlesPopover] = useState(false);
+    const [extraPuzzle, setExtraPuzzle] = useState<ExternalPuzzle | null>(null);
     const audioPlayerRef = useRef<AudioPlayerRef>(null);
 
     useEffect(() => {
@@ -81,6 +91,37 @@ export default function Game({ dailyPuzzle, genre = null, isSpecial = false, max
         }
     }, [gameState, dailyPuzzle]);
 
+    // Track gespielte Tagesrätsel & entscheide, ob das Partner-Popover gezeigt werden soll
+    useEffect(() => {
+        if (!gameState || !dailyPuzzle) return;
+
+        const gameEnded = gameState.isSolved || gameState.isFailed;
+        if (!gameEnded) return;
+
+        const genreKey = getGenreKey(isSpecial ? null : genre, isSpecial, isSpecial ? genre || undefined : undefined);
+        markDailyPuzzlePlayedToday(genreKey);
+
+        if (!requiredDailyKeys || requiredDailyKeys.length === 0) return;
+        if (hasSeenExtraPuzzlesPopoverToday()) return;
+        if (!hasPlayedAllDailyPuzzlesForToday(requiredDailyKeys)) return;
+
+        const partnerPuzzle = getRandomExternalPuzzle();
+        if (!partnerPuzzle) return;
+
+        setExtraPuzzle(partnerPuzzle);
+        setShowExtraPuzzlesPopover(true);
+        markExtraPuzzlesPopoverShownToday();
+
+        if (typeof window !== 'undefined' && window.plausible) {
+            window.plausible('extra_puzzles_popover_shown', {
+                props: {
+                    partner: partnerPuzzle.id,
+                    url: partnerPuzzle.url,
+                },
+            });
+        }
+    }, [gameState?.isSolved, gameState?.isFailed, dailyPuzzle?.id, genre, isSpecial, requiredDailyKeys]);
+
     useEffect(() => {
         setLastAction(null);
     }, [dailyPuzzle?.id]);
@@ -490,6 +531,13 @@ export default function Game({ dailyPuzzle, genre = null, isSpecial = false, max
                     onSkip={handleYearSkip}
                 />
             )}
+
+            {showExtraPuzzlesPopover && extraPuzzle && (
+                <ExtraPuzzlesPopover
+                    puzzle={extraPuzzle}
+                    onClose={() => setShowExtraPuzzlesPopover(false)}
+                />
+            )}
         </div>
     );
 }