Enhance mood change calculation in FalukantService

- Updated the mood change calculation to include a random bonus between 0 and 7 points, improving variability in user experience.
- Refactored the calculation logic for clarity, separating the base change value from the random bonus.

backend/services/falukantService.js

@@ -1725,8 +1725,11 @@ class FalukantService extends BaseService {
             throw new Error('noMoodData');
         }
         const moodSuitability = moodRecord.suitability;
-        // Gleiche Berechnung wie im Frontend: (moodValue + highestCharacterValue) / 2
-        const changeValue = Math.round((moodSuitability + highestCharacterValue) / 2);
+        // Basis-Berechnung wie im Frontend: (moodValue + highestCharacterValue) / 2
+        const baseChangeValue = Math.round((moodSuitability + highestCharacterValue) / 2);
+        // Zusätzlicher zufälliger Bonus zwischen 0 und 7 Punkten
+        const randomBonus = Math.floor(Math.random() * 8); // 0–7 inklusive
+        const changeValue = baseChangeValue + randomBonus;
         await updateFalukantUserMoney(user.id, -cost, 'Gift cost', user.id);
         await relation.update({ nextStepProgress: relation.nextStepProgress + changeValue });
         await PromotionalGiftLog.create({