tui: use text-base color for prompt selects #26

Job	Run time
compute-hash (aarch64-linux, blacksmith-4vcpu-ubuntu-2404-arm)	1s
compute-hash (x86_64-linux, blacksmith-4vcpu-ubuntu-2404)	1d 0h 0m 1s
compute-hash (x86_64-darwin, macos-15-intel)	11m 1s
compute-hash (aarch64-darwin, macos-latest)	10m 22s
update-hashes	0s
	1d 0h 21m 25s

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