fix live camera runtime refresh and title recovery

tests/e2e/app.spec.ts

@@ -82,7 +82,23 @@ test("live camera switches into viewer mode when another device already owns ana
   await expect(page.getByTestId("live-camera-score-overall")).toBeVisible();
 });
 
-test("live camera retries viewer stream when owner track is not ready on first attempt", async ({ page }) => {
+test("live camera recovers mojibake viewer titles before rendering", async ({ page }) => {
+  const state = await installAppMocks(page, { authenticated: true, liveViewerMode: true });
+  const mojibakeTitle = Buffer.from("服务端同步烟雾测试", "utf8").toString("latin1");
+  if (state.liveRuntime.runtimeSession) {
+    state.liveRuntime.runtimeSession.title = mojibakeTitle;
+    state.liveRuntime.runtimeSession.snapshot = {
+      ...state.liveRuntime.runtimeSession.snapshot,
+      title: mojibakeTitle,
+    };
+  }
+
+  await page.goto("/live-camera");
+  await expect(page.getByRole("heading", { name: "服务端同步烟雾测试" })).toBeVisible();
+  await expect(page.getByText(mojibakeTitle)).toHaveCount(0);
+});
+
+test("live camera no longer opens viewer peer retries when server relay is active", async ({ page }) => {
   const state = await installAppMocks(page, {
     authenticated: true,
     liveViewerMode: true,
@@ -91,9 +107,9 @@ test("live camera retries viewer stream when owner track is not ready on first a
 
   await page.goto("/live-camera");
   await expect(page.getByText("同步观看模式")).toBeVisible();
-  await expect.poll(() => state.viewerSignalConflictRemaining).toBe(0);
-  await expect.poll(() => state.mediaSession?.viewerCount ?? 0).toBe(1);
-  await expect(page.getByText(/同步观看中|重新同步/).first()).toBeVisible();
+  await expect.poll(() => state.viewerSignalConflictRemaining).toBe(1);
+  await expect.poll(() => state.mediaSession?.viewerCount ?? 0).toBe(0);
+  await expect(page.locator('img[alt="同步中的实时分析画面"]')).toBeVisible();
 });
 
 test("live camera archives overlay videos into the library after analysis stops", async ({ page }) => {