refactor(dashboard): immutable state updates, drag-drop hook, and gra… #278

Job	Run time
build-storybook-docs	-1s
build-deploy-diracx-web-release-image	-1s
build-deploy-diracx-web-dev-image	-1s
deploy-storybook-docs	-1s
build-deploy-library-package	-1s
Update Helm charts	0s
release-please	-9s
	-14s

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