Update stale observe evals (#1615)

# why
Stale evals

# what changed

- `observe_yc_startup.ts`: website changed CSS selectors
- `observe_simple_google_search.ts`: switched to press enter instead of
clicking potentially opaque google search button

# test plan

<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Updated stale observe evals to match site changes and reduce flakiness.
YC companies selectors fixed, and Google search now uses Enter with a
short wait.

- **Bug Fixes**
- YC companies: wait for network idle and update container selectors to
_rightCol_zhfs4_592 and _section_zhfs4_163._results_zhfs4_343.
- Google search: switch observation to “Press enter” and add a 3s delay
before asserting the expected URL.

<sup>Written for commit 8126020.
Summary will update on new commits. <a
href="https://cubic.dev/pr/browserbase/stagehand/pull/1615">Review in
cubic</a></sup>

<!-- End of auto-generated description by cubic. -->

Author: miguelg719

packages/evals/tasks/observe_simple_google_search.ts

@@ -19,14 +19,13 @@ export const observe_simple_google_search: EvalFunction = async ({
       const action1 = observation1[0];
       await v3.act(action1);
     }
-    const observation2 = await v3.observe(
-      "Click the search button in the suggestions dropdown",
-    );
+    const observation2 = await v3.observe("Press enter");
 
     if (observation2.length > 0) {
       const action2 = observation2[0];
       await v3.act(action2);
     }
+    await new Promise((resolve) => setTimeout(resolve, 3000));
 
     const expectedUrl =
       "https://browserbase.github.io/stagehand-eval-sites/sites/google/openai.html";

packages/evals/tasks/observe_yc_startup.ts

@@ -8,7 +8,9 @@ export const observe_yc_startup: EvalFunction = async ({
 }) => {
   try {
     const page = v3.context.pages()[0];
-    await page.goto("https://www.ycombinator.com/companies");
+    await page.goto("https://www.ycombinator.com/companies", {
+      waitUntil: "networkidle",
+    });
 
     const observations = await v3.observe(
       "Click the container element that holds links to each of the startup companies. The companies each have a name, a description, and a link to their website.",
@@ -25,8 +27,8 @@ export const observe_yc_startup: EvalFunction = async ({
     }
 
     const possibleLocators = [
-      `div._rightCol_i9oky_592`,
-      `div._section_i9oky_163._results_i9oky_343`,
+      `div._rightCol_zhfs4_592`,
+      `div._section_zhfs4_163._results_zhfs4_343`,
     ];
 
     // Precompute candidate backendNodeIds