feat(FalukantService, FamilyView): enhance marriage satisfaction handling

- Added logic to initialize marriage satisfaction to 100 for newly married couples in the FalukantService.
- Updated the FamilyView component to conditionally display marriage satisfaction only for married relationships, improving clarity in the UI.
- Ensured default values are used when marriage satisfaction is not explicitly set, enhancing user experience.

frontend/src/views/falukant/FamilyView.vue

@@ -110,7 +110,7 @@
                                     <dt>{{ $t('falukant.family.spouse.status') }}</dt>
                                     <dd>{{ $t('falukant.family.statuses.' + relationships[0].relationshipType) }}</dd>
                                 </div>
-                                <div v-if="relationships[0].marriageSatisfaction != null">
+                                <div v-if="relationships[0].relationshipType === 'married' && relationships[0].marriageSatisfaction != null">
                                     <dt>{{ $t('falukant.family.spouse.marriageSatisfaction') }}</dt>
                                     <dd>
                                         {{ relationships[0].marriageSatisfaction }}
@@ -212,7 +212,7 @@
             </div>
 
             <section v-if="marriageSatisfaction != null || householdTension" class="marriage-overview surface-card">
-                <div class="marriage-overview__item" v-if="marriageSatisfaction != null">
+                <div class="marriage-overview__item" v-if="relationships.length > 0 && relationships[0].relationshipType === 'married' && marriageSatisfaction != null">
                     <span class="marriage-overview__label">{{ $t('falukant.family.spouse.marriageSatisfaction') }}</span>
                     <strong>{{ marriageSatisfaction }}</strong>
                 </div>