fix(dynasty): normalize archived nation records

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

@@ -0,0 +1,38 @@
+import { asRecord } from '@sammo-ts/common';
+import type { Nation } from '@sammo-ts/logic';
+
+const readNumber = (value: unknown): number => {
+    const parsed = typeof value === 'string' ? Number(value) : value;
+    return typeof parsed === 'number' && Number.isFinite(parsed) ? parsed : 0;
+};
+
+const readTextArray = (value: unknown): string[] =>
+    Array.isArray(value) ? value.filter((entry): entry is string => typeof entry === 'string') : [];
+
+export const buildOldNationArchiveData = (options: {
+    nation: Nation;
+    generalIds: readonly number[];
+    history: readonly string[];
+}): Record<string, unknown> => {
+    const { nation } = options;
+    const meta = asRecord(nation.meta);
+    const maxPower = asRecord(meta.max_power);
+    const aux = {
+        ...asRecord(meta.aux),
+        ...maxPower,
+    };
+    const maxCities = readTextArray(maxPower.maxCities);
+
+    return {
+        ...nation,
+        nation: nation.id,
+        type: nation.typeCode,
+        tech: readNumber(meta.tech),
+        maxPower: readNumber(maxPower.maxPower),
+        maxCrew: readNumber(maxPower.maxCrew),
+        maxCities,
+        aux,
+        generals: [...options.generalIds],
+        history: [...options.history],
+    };
+};