fix(private-room): preserve payment return route

src/lib/navigation/__tests__/subscription_exit.test.ts

@@ -12,6 +12,7 @@ import {
   consumeSubscriptionExplicitExitUrl,
   getSubscriptionFallbackExitUrl,
   peekSubscriptionExplicitExitUrl,
+  resolveSubscriptionSuccessExitUrl,
 } from "../subscription_exit";
 
 vi.mock("../chat_image_return_session", () => ({
@@ -65,6 +66,69 @@ describe("subscription exit helpers", () => {
     );
   });
 
+  it("returns directly to private room without consuming chat state", async () => {
+    consumePendingChatImageReturnMock.mockResolvedValue({
+      reason: "image_paywall",
+      messageId: "msg_1",
+      returnUrl: "/chat?image=msg_1",
+      createdAt: 1,
+    });
+    peekPendingChatUnlockMock.mockResolvedValue({
+      reason: "single_message_unlock",
+      displayMessageId: "msg_1",
+      messageId: "msg_1",
+      kind: "image",
+      returnUrl: "/chat?image=msg_1",
+      stage: "payment",
+      createdAt: 1,
+    });
+
+    expect(getSubscriptionFallbackExitUrl("private-room")).toBe(
+      ROUTES.privateRoom,
+    );
+    await expect(consumeSubscriptionExitUrl("private-room")).resolves.toBe(
+      ROUTES.privateRoom,
+    );
+    expect(consumePendingChatImageReturnMock).not.toHaveBeenCalled();
+    expect(peekPendingChatUnlockMock).not.toHaveBeenCalled();
+    expect(clearPendingChatUnlockMock).not.toHaveBeenCalled();
+  });
+
+  it("keeps private room ahead of stale chat state after payment", async () => {
+    peekPendingChatUnlockMock.mockResolvedValue({
+      reason: "single_message_unlock",
+      displayMessageId: "msg_1",
+      messageId: "msg_1",
+      kind: "image",
+      returnUrl: "/chat?image=msg_1",
+      stage: "payment",
+      createdAt: 1,
+    });
+
+    await expect(
+      resolveSubscriptionSuccessExitUrl("private-room"),
+    ).resolves.toBe(ROUTES.privateRoom);
+    expect(peekPendingChatUnlockMock).not.toHaveBeenCalled();
+    expect(clearPendingChatUnlockMock).not.toHaveBeenCalled();
+  });
+
+  it("keeps pending chat unlocks ahead of chat fallback after payment", async () => {
+    peekPendingChatUnlockMock.mockResolvedValue({
+      reason: "single_message_unlock",
+      displayMessageId: "msg_1",
+      messageId: "msg_1",
+      kind: "image",
+      returnUrl: "/chat?image=msg_1",
+      stage: "payment",
+      createdAt: 1,
+    });
+
+    await expect(resolveSubscriptionSuccessExitUrl("chat")).resolves.toBe(
+      "/chat?image=msg_1",
+    );
+    expect(clearPendingChatUnlockMock).not.toHaveBeenCalled();
+  });
+
   it("peeks chat unlock return urls without clearing them", async () => {
     peekPendingChatUnlockMock.mockResolvedValue({
       reason: "single_message_unlock",