feat(content): add action unlock condition schema

src/content/schema.ts

@@ -20,16 +20,23 @@ export const resourceAmountSchema = z.object({
   amount: z.number().positive(),
 });
 
+export const unlockDefSchema = z.object({
+  minResources: z.record(z.string(), z.number().nonnegative()).optional(),
+  requireStoryFlags: z.array(z.string().min(1)).optional(),
+});
+
 export const actionDefSchema = z.object({
   id: z.string().min(1),
   name: z.string().min(1),
   durationMs: z.number().positive(),
   costs: z.array(resourceAmountSchema).default([]),
   yields: z.array(resourceAmountSchema).min(1),
+  unlock: unlockDefSchema.optional(),
 });
 
 export type ResourceDef = z.infer<typeof resourceDefSchema>;
 export type ResourceAmount = z.infer<typeof resourceAmountSchema>;
+export type UnlockDef = z.infer<typeof unlockDefSchema>;
 export type ActionDef = z.infer<typeof actionDefSchema>;
 
 export interface Content {