feat(ui): disable select not running pod and bring back arrow to selected pod

[linghaoSu]

Summary

Fixes #21621

1. Disabled the ability to select pods that are not running.
2. Fixed the issue where the arrow indicating the selected pod loses its style.

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After

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• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
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