agent_ui: Allow expanding running MCP tool calls (#60695)

Closes #57144

Release Notes:

- agent: Allow expanding in-progress MCP tool calls

Co-authored-by: Christopher Biscardi <chris@christopherbiscardi.com>
3c45bfb205Bennet Bo Fenner committed on 7/9/2026, 4:49:57 PM· committed by GitHubparent717e1c0
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