A few fixes for TAC evaluation harness

[li-boxuan]

End-user friendly description of the problem this fixes or functionality that this introduces

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Give a summary of what the PR does, explaining any non-trivial design decisions

A few fixes to facilitate recent visual-browsing experimental efforts @adityasoni9998 is working on.

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Link of any specific issues this addresses

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To run this PR locally, use the following command:

docker run -it --rm   -p 3000:3000   -v /var/run/docker.sock:/var/run/docker.sock   --add-host host.docker.internal:host-gateway   -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.all-hands.dev/all-hands-ai/runtime:3c90538-nikolaik   --name openhands-app-3c90538   docker.all-hands.dev/all-hands-ai/openhands:3c90538