fix(viewer): address title ci

Author: codybrouwers

e2e/viewer.spec.ts

@@ -275,13 +275,13 @@ test("activity in an unselected session badges the tab title until viewed", asyn
   await publish(server.url, { html: "<p>a</p>", title: "First", agent: "one" });
 
   await page.goto(server.url);
-  await expect(page).toHaveTitle("sideshow");
+  await expect(page).toHaveTitle("one session · sideshow");
 
   await publish(server.url, { html: "<p>b</p>", title: "Second", agent: "two" });
 
-  await expect(page).toHaveTitle("(1) sideshow");
+  await expect(page).toHaveTitle("(1) one session · sideshow");
   await page.locator(".sess", { hasText: "two" }).click();
-  await expect(page).toHaveTitle("sideshow");
+  await expect(page).toHaveTitle("two session · sideshow");
 });
 
 test("Cmd+Option+Up/Down switches between sessions, wrapping at the ends", async ({

server/app.ts

@@ -656,9 +656,11 @@ export function createApp({
     if (!title) return text;
     const escaped = escapeHtml(title);
     const titleTag = `<title>${escaped}</title>`;
-    return /<title>.*?<\/title>/.test(text)
-      ? text.replace(/<title>.*?<\/title>/, titleTag)
-      : injectHead(text, titleTag);
+    const titleStart = text.indexOf("<title>");
+    if (titleStart < 0) return injectHead(text, titleTag);
+    const titleEnd = text.indexOf("</title>", titleStart + "<title>".length);
+    if (titleEnd < 0) return injectHead(text, titleTag);
+    return `${text.slice(0, titleStart)}${titleTag}${text.slice(titleEnd + "</title>".length)}`;
   };
 
   const sessionDocumentTitle = (session: Session | null | undefined) => {