QoL features for the web UI#467

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frabert wants to merge 8 commits intomainfrom

frabert/buttercup-improvements

Commits on Apr 8, 2026

build(deps): update langchain ecosystem and transitive dependencies

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fix(ci): fix import sorting and ignore unfixed pygments CVE

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fix(ci): remove stale pip-audit ignores for orjson and protobuf

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refactor: move langfuse import to top level in llm.py

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Add task cancellation endpoint to dashboard API

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claude
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Add cancel button to dashboard UI for active tasks

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Add JSON file upload to task submission form

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claude
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Add SARIF file submission button and form
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