fix(vscode): scope render tab assertions to the editor tab

[tripleaceme]

Description

Part of #6071. This is the first fix out of the reproduction, not the whole issue — test-vscode-e2e stays if: false here, because the suite is not green yet. Full findings are on the issue.

render.spec.ts asserted on the rendered model's tab title with a bare text selector:

await expect(page.locator('text=sushi.customers (rendered)')).toBeVisible()

Recent VS Code builds ship Copilot/Chat, and the chat view echoes the active editor's name. The selector therefore matches two elements and Playwright fails strict mode:

strict mode violation: locator('text=sushi.customers (rendered)') resolved to 2 elements:
  1) <a class="label-name">sushi.customers (rendered)</a>
  2) <span class="monaco-highlighted-label">sushi.customers (rendered)</span>
     aka getByLabel('Enable current file context').locator('a')

Matching the editor tab by role instead ignores the chat entry.

Worth flagging for the pinning question in the issue: this fails identically on code-server 4.107.1 and 4.137.0. 4.107.1 is the newest release that existed when the job was disabled (if: false landed in 529ed005, authored 2026-01-11 23:42 UTC; 4.108.0 shipped 19:24 UTC the next day). So this particular breakage was already present at the pin date — pinning code-server would not have fixed it, which is consistent with the job failing 100% of the time rather than flaking.

Test Plan

Local Playwright run against code-server 4.107.1 and 4.137.0, both with the extension vsix installed and the repo .venv as the interpreter. All 4 render.spec.ts tests fail before this change and pass after, on both versions.

pnpm exec playwright test tests/render.spec.ts
4 passed

pnpm run lint clean.

The rest of the suite is not green — 26 failures remain on a full run, covered in the issue. None of them are in this file.

Checklist

• I have run make style and fixed any issues
• I have added tests for my changes (if applicable)
• All existing tests pass (make fast-test)
• My commits are signed off (git commit -s) per the DCO

[tripleaceme]

@cmgoffena13 — first fix out of the #6071 reproduction. Deliberately small: it fixes render.spec.ts only and leaves test-vscode-e2e disabled, since the suite is not green yet.

The detail is on the issue, but the part that bears on your lead hypothesis is worth repeating here: this failure is identical on code-server 4.107.1 and 4.137.0, and 4.107.1 is the newest build that existed when the job was turned off. So pinning would not have fixed it — the drift predates the pin date. Still worth pinning for reproducibility, just not as the fix.

Happy to fold this into a larger PR later if you would rather land the e2e work in one go.