fix(chat): sync paid voice audio unlock flow

src/stores/chat/__tests__/chat-machine.helpers.test.ts

@@ -14,7 +14,6 @@ function makeResponse(
 ): ChatSendResponse {
   return ChatSendResponse.from({
     reply: "AI reply",
-    audioUrl: "",
     messageId: "msg-1",
     isGuest: false,
     timestamp: 1782356425363,
@@ -62,7 +61,6 @@ describe("sendResponseToUiMessage", () => {
   it("maps locked voice messages without treating them as private text", () => {
     const message = sendResponseToUiMessage(
       makeResponse({
-        audioUrl: "",
         lockDetail: {
           locked: true,
           reason: "voice_message",
@@ -78,6 +76,34 @@ describe("sendResponseToUiMessage", () => {
     expect(message.privateMessageHint).toBeUndefined();
   });
 
+  it("does not expose an audio URL from a locked send response", () => {
+    const message = sendResponseToUiMessage(
+      makeResponse({
+        audioUrl: "https://example.com/locked-voice.mp3",
+        lockDetail: {
+          locked: true,
+          reason: "voice_message",
+        },
+      }),
+    );
+
+    expect(message.audioUrl).toBeUndefined();
+    expect(message.locked).toBe(true);
+  });
+
+  it("maps an audio URL from an unlocked send response", () => {
+    const message = sendResponseToUiMessage(
+      makeResponse({
+        audioUrl: "https://example.com/unlocked-voice.mp3",
+      }),
+    );
+
+    expect(message.audioUrl).toBe(
+      "https://example.com/unlocked-voice.mp3",
+    );
+    expect(message.locked).toBe(false);
+  });
+
   it("maps locked private text messages as private messages", () => {
     const message = sendResponseToUiMessage(
       makeResponse({
@@ -227,7 +253,7 @@ describe("localMessagesToUi", () => {
         type: "voice",
         content: "hidden voice transcript",
         createdAt: "2026-06-25T12:00:00.000Z",
-        audioUrl: null,
+        audioUrl: "https://example.com/locked-history-voice.mp3",
         image: { type: null, url: null },
         lockDetail: {
           locked: true,

src/stores/chat/__tests__/chat-machine.transitions.test.ts

@@ -57,10 +57,6 @@ function makeUnlockPrivateResponse(
     creditsCharged: 10,
     requiredCredits: 10,
     shortfallCredits: 0,
-    lockDetail: {
-      locked: false,
-      reason: null,
-    },
     ...overrides,
   });
 }
@@ -822,10 +818,6 @@ describe("chatMachine transitions", () => {
             creditsCharged: 0,
             requiredCredits: 10,
             shortfallCredits: 7,
-            lockDetail: {
-              locked: true,
-              reason: "voice_message",
-            },
           }),
         },
       }),

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

@@ -57,10 +57,6 @@ describe("chat promotion", () => {
           type: "promotion",
           url: "https://example.com/unlocked.jpg",
         },
-        lockDetail: {
-          locked: false,
-          reason: null,
-        },
       }),
     });
 

src/stores/chat/chat-message-mappers.ts

@@ -27,7 +27,9 @@ export function localMessagesToUi(
     }),
     isFromAI: m.role === "assistant",
     date: messageDateFromCreatedAt(m.createdAt),
-    ...(m.audioUrl ? { audioUrl: m.audioUrl } : {}),
+    ...(m.audioUrl && m.lockDetail?.locked !== true
+      ? { audioUrl: m.audioUrl }
+      : {}),
     ...deriveUiLockFields(m.lockDetail, m.image?.url),
   }));
 }
@@ -46,7 +48,9 @@ export function sendResponseToUiMessage(response: ChatSendResponse): UiMessage {
     }),
     isFromAI: true,
     date: todayString(new Date(response.timestamp)),
-    ...(response.audioUrl ? { audioUrl: response.audioUrl } : {}),
+    ...(response.audioUrl && !response.lockDetail.locked
+      ? { audioUrl: response.audioUrl }
+      : {}),
     ...deriveUiLockFields(response.lockDetail, response.image.url),
   };
 }

src/stores/chat/chat-send-flow.ts

@@ -197,7 +197,7 @@ function hasRenderableSendResponse(response: ChatSendResponse): boolean {
 
   return (
     response.reply.trim().length > 0 ||
-    response.audioUrl.trim().length > 0 ||
+    (!response.lockDetail.locked && response.audioUrl.trim().length > 0) ||
     Boolean(response.image.url) ||
     isLockedPaidMessage
   );

src/stores/chat/chat-unlock-flow.ts

@@ -80,7 +80,7 @@ export const unlockMessageActor = fromPromise<
         ...(unlockResult.data.image.url
           ? { image: unlockResult.data.image }
           : {}),
-        lockDetail: unlockResult.data.lockDetail,
+        lockDetail: { locked: false, reason: null },
       },
       cacheIdentityResult.data,
     );

src/stores/chat/chat-unlock-helpers.ts

@@ -48,27 +48,15 @@ export function applySingleUnlockOutput(
       content: resolvedContent,
       audioUrl: getUnlockedAudioUrl(message, output.response),
       imageUrl: resolvedImageUrl,
-      locked: output.response.lockDetail.locked,
-      lockReason: output.response.lockDetail.reason,
-      imagePaywalled: resolvedImageUrl
-        ? isLockedImage(output.response.lockDetail)
-        : undefined,
+      locked: false,
+      lockReason: null,
+      imagePaywalled: resolvedImageUrl ? false : undefined,
       lockedPrivate: false,
       privateMessageHint: null,
     };
   });
 }
 
-function isLockedImage(lockDetail: {
-  locked: boolean;
-  reason: string | null;
-}): boolean {
-  return (
-    lockDetail.locked &&
-    (lockDetail.reason === "image_paywall" || lockDetail.reason === "image")
-  );
-}
-
 function getUnlockedAudioUrl(
   message: UiMessage,
   response: UnlockPrivateResponse,