refactor(data): replace schema classes with readonly models

src/stores/chat/__tests__/chat-promotion.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, it } from "vitest";
 
-import { UnlockPrivateResponse } from "@/data/schemas/chat";
+import { UnlockPrivateResponseSchema } from "@/data/schemas/chat";
 import type { PendingChatPromotion } from "@/data/storage/navigation";
 import {
   appendPromotionMessage,
@@ -50,7 +50,7 @@ describe("chat promotion", () => {
         lockType: "image_paywall",
         clientLockId: "promotion-1",
       },
-      response: UnlockPrivateResponse.from({
+      response: UnlockPrivateResponseSchema.parse({
         unlocked: true,
         messageId: "backend-1",
         image: {