fix(chat): sync paid voice audio unlock flow

src/data/dto/chat/__tests__/unlock_private_response.test.ts

@@ -13,10 +13,6 @@ describe("UnlockPrivateResponse", () => {
       creditsCharged: 10,
       requiredCredits: 10,
       shortfallCredits: 0,
-      lockDetail: {
-        locked: false,
-        reason: null,
-      },
     });
 
     expect(response.unlocked).toBe(true);
@@ -27,7 +23,6 @@ describe("UnlockPrivateResponse", () => {
     expect(response.creditsCharged).toBe(10);
     expect(response.requiredCredits).toBe(10);
     expect(response.shortfallCredits).toBe(0);
-    expect(response.lockDetail.locked).toBe(false);
   });
 
   it("normalizes backend ids, audio aliases, and unlocked images", () => {
@@ -43,10 +38,6 @@ describe("UnlockPrivateResponse", () => {
         type: "promotion",
         url: "https://example.com/image.jpg",
       },
-      lockDetail: {
-        locked: false,
-        reason: null,
-      },
     });
 
     expect(response.messageId).toBe("backend-message-1");
@@ -66,10 +57,6 @@ describe("UnlockPrivateResponse", () => {
       creditsCharged: 0,
       requiredCredits: 10,
       shortfallCredits: 5,
-      lockDetail: {
-        locked: true,
-        reason: "voice_message",
-      },
     });
 
     expect(response.unlocked).toBe(false);
@@ -78,10 +65,6 @@ describe("UnlockPrivateResponse", () => {
     expect(response.creditsCharged).toBe(0);
     expect(response.requiredCredits).toBe(10);
     expect(response.shortfallCredits).toBe(5);
-    expect(response.lockDetail).toEqual({
-      locked: true,
-      reason: "voice_message",
-    });
   });
 
   it("defaults nullable content to an empty string", () => {
@@ -90,10 +73,6 @@ describe("UnlockPrivateResponse", () => {
       content: null,
       audioUrl: null,
       reason: "insufficient_balance",
-      lockDetail: {
-        locked: true,
-        reason: "private_message",
-      },
     });
 
     expect(response.content).toBe("");
@@ -109,10 +88,6 @@ describe("UnlockPrivateResponse", () => {
       creditsCharged: null,
       requiredCredits: null,
       shortfallCredits: null,
-      lockDetail: {
-        locked: true,
-        reason: "image_paywall",
-      },
     });
 
     expect(response.creditBalance).toBe(0);
@@ -121,21 +96,7 @@ describe("UnlockPrivateResponse", () => {
     expect(response.shortfallCredits).toBe(0);
   });
 
-  it("defaults nullable lock detail through schema helpers", () => {
-    const response = UnlockPrivateResponse.from({
-      unlocked: false,
-      content: "",
-      reason: "insufficient_balance",
-      lockDetail: null,
-    });
-
-    expect(response.lockDetail).toEqual({
-      locked: false,
-      reason: null,
-    });
-  });
-
-  it("strips legacy lock detail fields while preserving lock state and type", () => {
+  it("strips legacy lock detail fields", () => {
     const response = UnlockPrivateResponse.fromJson({
       unlocked: false,
       lockDetail: {
@@ -148,9 +109,7 @@ describe("UnlockPrivateResponse", () => {
       },
     });
 
-    expect(response.lockDetail).toEqual({
-      locked: true,
-      reason: "private_message",
-    });
+    expect(response.toJson()).not.toHaveProperty("lockDetail");
+    expect(response).not.toHaveProperty("lockDetail");
   });
 });

src/data/dto/chat/response/unlock_private_response.ts

@@ -4,7 +4,6 @@ import {
   type UnlockPrivateResponseData,
   type UnlockPrivateResponseInput,
 } from "@/data/schemas/chat/response/unlock_private_response";
-import type { ChatLockDetailData } from "@/data/schemas/chat";
 import type { ChatImageData, ChatLockType } from "@/data/schemas/chat";
 
 /**
@@ -23,7 +22,6 @@ export class UnlockPrivateResponse {
   declare readonly creditsCharged: number;
   declare readonly requiredCredits: number;
   declare readonly shortfallCredits: number;
-  declare readonly lockDetail: ChatLockDetailData;
 
   private constructor(input: UnlockPrivateResponseInput) {
     const data = UnlockPrivateResponseSchema.parse(input);

src/data/repositories/__tests__/chat_media_cache_helpers.test.ts

@@ -34,7 +34,6 @@ function makeResponse(
 ): ChatSendResponse {
   return ChatSendResponse.from({
     reply: "",
-    audioUrl: "",
     messageId: "msg-1",
     isGuest: false,
     timestamp: 1782356425363,
@@ -92,6 +91,33 @@ describe("chat media cache helpers", () => {
     ).toEqual([]);
   });
 
+  it("does not cache audio from a locked send response", () => {
+    expect(
+      getSendResponseMediaTargets(
+        makeResponse({
+          audioUrl: "https://example.com/locked.mp3",
+          lockDetail: { locked: true, reason: "voice_message" },
+        }),
+      ),
+    ).toEqual([]);
+  });
+
+  it("caches audio from an unlocked send response", () => {
+    expect(
+      getSendResponseMediaTargets(
+        makeResponse({
+          audioUrl: "https://example.com/unlocked.mp3",
+        }),
+      ),
+    ).toEqual([
+      {
+        messageId: "msg-1",
+        kind: "audio",
+        remoteUrl: "https://example.com/unlocked.mp3",
+      },
+    ]);
+  });
+
   it("deduplicates media targets", () => {
     expect(
       uniqueMediaTargets([

src/data/repositories/chat_media_cache_helpers.ts

@@ -42,11 +42,13 @@ export function getSendResponseMediaTargets(
     kind: "image",
     remoteUrl: response.image.url,
   });
-  pushMediaTarget(targets, {
-    messageId: response.messageId,
-    kind: "audio",
-    remoteUrl: response.audioUrl,
-  });
+  if (!response.lockDetail.locked) {
+    pushMediaTarget(targets, {
+      messageId: response.messageId,
+      kind: "audio",
+      remoteUrl: response.audioUrl,
+    });
+  }
   return targets;
 }
 

src/data/schemas/chat/response/unlock_private_response.ts

@@ -6,7 +6,7 @@ import {
   stringOrEmpty,
   stringOrNull,
 } from "../../nullable-defaults";
-import { ChatImageSchema, ChatLockDetailSchema } from "../chat_payloads";
+import { ChatImageSchema } from "../chat_payloads";
 import { ChatLockTypeSchema } from "../chat_lock_type";
 
 /**
@@ -31,7 +31,6 @@ export const UnlockPrivateResponseSchema = z
     creditsCharged: numberOrZero,
     requiredCredits: numberOrZero,
     shortfallCredits: numberOrZero,
-    lockDetail: ChatLockDetailSchema,
   })
   .transform(({ reply, message_id, audio_url, ...data }) => ({
     ...data,