agent: Improve compaction UI (#58409)

Reworked the UI so we can actually see the compaction output. Design
pass TBD


https://github.com/user-attachments/assets/89108398-476b-493f-a5eb-d20159fc6830



Release Notes:

- N/A

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Co-authored-by: Gaauwe Rombouts <mail@grombouts.nl>
Co-authored-by: Richard Feldman <oss@rtfeldman.com>
176622acf9Bennet Bo Fenner committed on 6/3/2026, 12:18:28 PM· committed by GitHubparent08934fa
6 files changedLine totals unavailable