fix: aria snapshot issues

[dgozman]

• frame.locator().ariaSnapshot had the wrong base frame
• depth option was not respected across iframe boundaries

[github-actions]

Test results for "MCP"

1 failed
❌ [chrome] › mcp/dashboard.spec.ts:23 › should show browser session chip @mcp-windows-latest

5457 passed, 340 skipped

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Merge workflow run.

[github-actions]

Test results for "tests 1"

8 flaky

⚠️ [chromium-library] › library/trace-viewer.spec.ts:1223 › should display language-specific locators `@ubuntu-22.04-chromium-tip-of-tree`
⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@chromium-ubuntu-22.04-arm-node20`
⚠️ [chromium-library] › library/video.spec.ts:358 › screencast › should capture navigation `@chromium-ubuntu-22.04-arm-node20`
⚠️ [chromium-library] › library/trace-viewer.spec.ts:1223 › should display language-specific locators `@chromium-ubuntu-22.04-node24`
⚠️ [chromium-library] › library/trace-viewer.spec.ts:1223 › should display language-specific locators `@chromium-ubuntu-22.04-node20`
⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1080 › cli codegen › should not throw csp directive violation errors `@firefox-ubuntu-22.04-node20`
⚠️ [firefox-page] › page/page-wait-for-function.spec.ts:104 › should work with strict CSP policy `@firefox-ubuntu-22.04-node20`
⚠️ [playwright-test] › ui-mode-test-output.spec.ts:118 › should collapse repeated console messages for test `@ubuntu-latest-node20`

38820 passed, 845 skipped

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Merge workflow run.