Ergänze individuelle Charakterentwicklung und klare Hochzeitshinweise

backend/utils/falukant/characterDevelopment.js

@@ -0,0 +1,17 @@
+// Ages are whole game years (one real calendar day per year).
+export function hasReachedFertility(character, age) {
+    const threshold = character?.fertileFromAge;
+    return Number.isInteger(threshold) && threshold > 0
+        && Number.isFinite(age) && age >= threshold;
+}
+
+export function getCharacterDevelopment(character, age) {
+    const pubertyStartAge = character?.pubertyStartAge ?? null;
+    return {
+        pubertyStartAge,
+        fertileFromAge: character?.fertileFromAge ?? null,
+        hasReachedPuberty: Number.isInteger(pubertyStartAge) && pubertyStartAge > 0
+            && Number.isFinite(age) && age >= pubertyStartAge,
+        hasReachedFertility: hasReachedFertility(character, age),
+    };
+}