fix(#3538): always index scrollable dropdown containers

[laithrw]

Summary by cubic

Always index scrollable dropdown containers so they can be targeted by select_dropdown, even when they contain interactive descendants. Addresses #3538.

• Bug Fixes
  • Detect dropdowns by role (listbox, menu, combobox, menubar, tree, grid), tag (select), or common classes (dropdown, dropdown-menu, select-menu, Semantic UI “ui dropdown”).
  • Leave other scrollable elements unchanged: only indexed when they have no interactive descendants.

^{Written for commit 7bacbbb. Summary will update on new commits.}

[github-actions]

Agent Task Evaluation Results: 2/2 (100%)

View detailed results

Task	Result	Reason
amazon_laptop	✅ Pass	Skipped - API key not available (fork PR or missing secret)
browser_use_pip	✅ Pass	Skipped - API key not available (fork PR or missing secret)

Check the evaluate-tasks job for detailed task execution logs.

[cubic-dev-ai]

No issues found across 1 file

[MagMueller]

Evaluation Results

Commit: e1c4eee • Score: ✅ 97.4%

📊 View Details

Summary

• Success Rate: ✅ 97.4%
• Average Steps: 6.1 steps/task
• Average Time: 10.2 sec/task
• Average Time per Step: 1.7s/step

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Automated evaluation by browser-use

[MagMueller]

Evaluation Results

Commit: 7bacbbb • Score: ✅ 89.7%

📊 View Details

Summary

• Success Rate: ✅ 89.7%
• Average Steps: 6.5 steps/task
• Average Time: 12.0 sec/task
• Average Time per Step: 1.8s/step

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Automated evaluation by browser-use