내무부, 금/쌀수입, 감찰부 구현

app/game-engine/src/turn/calendarHandlers.ts

@@ -0,0 +1,22 @@
+import type { TurnCalendarHandler } from './inMemoryWorld.js';
+
+export const composeCalendarHandlers = (
+    ...handlers: Array<TurnCalendarHandler | null | undefined>
+): TurnCalendarHandler | null => {
+    const resolved = handlers.filter(Boolean) as TurnCalendarHandler[];
+    if (resolved.length === 0) {
+        return null;
+    }
+    return {
+        onMonthChanged: (context) => {
+            for (const handler of resolved) {
+                handler.onMonthChanged?.(context);
+            }
+        },
+        onYearChanged: (context) => {
+            for (const handler of resolved) {
+                handler.onYearChanged?.(context);
+            }
+        },
+    };
+};