Enhance health management in FalukantService to improve user feedback and error handling

- Updated health deduction logic to clarify the distinction between health and monetary costs.
- Added error handling for money update failures to ensure robust transaction processing.
- Modified return value to include updated health status, providing clearer information for UI updates.

backend/services/falukantService.js

@@ -4189,7 +4189,7 @@ class FalukantService extends BaseService {
         if (user.money - activityObject.cost < 0) {
             throw new Error('no money');
         }
-        user.character.health -= activityObject.cost;
+        // Hinweis: health ist ein Status (0..100) und darf nicht mit Geldkosten vermischt werden.
         const healthChange = await this[activityObject.method](user);
         await HealthActivity.create({
             characterId: user.character.id,
@@ -4197,12 +4197,18 @@ class FalukantService extends BaseService {
             successPercentage: healthChange,
             cost: activityObject.cost
         });
-        updateFalukantUserMoney(user.id, -activityObject.cost, 'health.' + activity);
+        const moneyResult = await updateFalukantUserMoney(user.id, -activityObject.cost, 'health.' + activity, user.id);
+        if (!moneyResult.success) throw new Error('Failed to update money');
         
         // Status-Update Notification senden
         notifyUser(user.user.hashedId, 'falukantUpdateStatus', {});
         
-        return { success: true };
+        // Give client enough info to update UI without ambiguity
+        const updatedChar = await FalukantCharacter.findOne({
+            where: { id: user.character.id },
+            attributes: ['health']
+        });
+        return { success: true, delta: healthChange, health: updatedChar?.health ?? null };
     }
 
     async healthChange(user, delta) {