Expand campaign visual assets

src/game/data/scenario.ts

@@ -1,7 +1,7 @@
 import type { TerrainType, UnitClassKey } from './battleRules';
 import type { EquipmentSet } from './battleItems';
 
-export type PortraitKey = 'liuBei' | 'guanYu' | 'zhangFei' | 'zhugeLiang' | 'zhaoYun' | 'jiangWei' | 'simaYi';
+export type PortraitKey = string;
 
 export type StoryPage = {
   id: string;