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/ceb/falukant.json

@@ -831,6 +831,10 @@
                     "maintenanceHigh": "Suporta 75",
                     "maintenanceSuccess": "Na-update ang suporta.",
                     "maintenanceError": "Dili ma-update ang suporta.",
+                    "improveAffection": "Pauswaga ang pagmahal ({cost})",
+                    "improveAffectionHint": "Mopataas sa pagmahal, mogasto og kwarta, ug mopataas usab sa visibility.",
+                    "improveAffectionSuccess": "Napalig-on ang pagmahal ({cost}). Bag-ong bili: pagmahal {affection}, visibility {visibility}, discretion {discretion}.",
+                    "improveAffectionError": "Dili mapaayo ang pagmahal.",
                     "acknowledge": "Iila",
                     "acknowledgeSuccess": "Giila na ang relasyon.",
                     "acknowledgeError": "Dili ma-ila ang relasyon.",