fix: improve auto-scroll behavior during API activities and streaming #13763

Job	Run time
check-translations	40s
knip	39s
platform-unit-test (ubuntu-latest)	3m 35s
compile	2m 3s
platform-unit-test (windows-latest)	6m 20s
check-openrouter-api-key	2s
integration-test	9m 29s
notify-slack-on-failure	0s
	22m 48s

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