feat(falukant): add improve lover affection feature and localization updates

- Introduced the `improveLoverAffection` method in FalukantService to enhance relationship dynamics by allowing users to boost affection at a cost.
- Updated FalukantController and FalukantRouter to include the new endpoint for improving lover affection.
- Enhanced FamilyView component to provide a button for users to trigger the affection improvement action.
- Added localization entries for the new feature in multiple languages, ensuring clarity in user interactions regarding affection improvements.

frontend/src/i18n/locales/es/falukant.json

@@ -796,6 +796,10 @@
                     "maintenanceHigh": "Mantenimiento 75",
                     "maintenanceSuccess": "Se ha ajustado el mantenimiento.",
                     "maintenanceError": "No se pudo ajustar el mantenimiento.",
+                    "improveAffection": "Mejorar afecto ({cost})",
+                    "improveAffectionHint": "Aumenta el afecto, cuesta dinero y también sube la visibilidad.",
+                    "improveAffectionSuccess": "El afecto ha mejorado ({cost}). Nuevos valores: afecto {affection}, visibilidad {visibility}, discreción {discretion}.",
+                    "improveAffectionError": "No se pudo mejorar el afecto.",
                     "acknowledge": "Reconocer",
                     "acknowledgeSuccess": "La relación ha sido reconocida oficialmente.",
                     "acknowledgeError": "No se pudo reconocer la relación.",