test(chat): add test for defaulting nullable content to an empty string

src/data/schemas/chat/unlock_private_response.ts

@@ -1,5 +1,6 @@
 import { z } from "zod";
 
+import { stringOrEmpty } from "../nullable-defaults";
 import { ChatLockDetailSchema } from "./chat_payloads";
 
 /**
@@ -9,7 +10,7 @@ export const UnlockPrivateReasonSchema = z.string().default("");
 
 export const UnlockPrivateResponseSchema = z.object({
   unlocked: z.boolean(),
-  content: z.string().default(""),
+  content: stringOrEmpty,
   reason: UnlockPrivateReasonSchema,
   creditBalance: z.number().default(0),
   creditsCharged: z.number().default(0),