Slug-based scenarios, quests and offers per the environments contract; regenerated models; e2e seed passes environment to admin mirrors

Claude-Session: https://claude.ai/code/session_01SMCvdwDmuxoaqGgvGBLk1V

src/state/shops.ts

@@ -16,12 +16,13 @@ export interface BuyOptions {
  */
 export type PurchaseOffer = (
   storeSlug: string,
-  offerId: string,
+  offerSlug: string,
   options?: BuyOptions,
 ) => Promise<PurchaseOfferResponse>;
 
 export class OfferHandle {
   public readonly id: string;
+  public readonly slug: string;
   public readonly name?: string;
   public readonly price?: OfferPrice;
   public readonly contents: OfferContent[];
@@ -35,7 +36,11 @@ export class OfferHandle {
     if (!offer.id) {
       throw new Error('Rudder Stores: offer.id is required');
     }
+    if (!offer.slug) {
+      throw new Error('Rudder Stores: offer.slug is required');
+    }
     this.id = offer.id;
+    this.slug = offer.slug;
     this.name = offer.name;
     this.price = offer.price;
     this.contents = offer.contents ?? [];
@@ -43,7 +48,7 @@ export class OfferHandle {
   }
 
   async buy(options: BuyOptions = {}): Promise<PurchaseOfferResponse> {
-    return this.purchase(this.storeSlug, this.id, options);
+    return this.purchase(this.storeSlug, this.slug, options);
   }
 }