Hi,

I noticed that the Kafka UI currently displays the Active Controller as a number, which appears to be the broker ID of the controller. This can be quite confusing for users, as they might interpret that number as the count of active controllers rather than an identifier.
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To improve clarity, I propose we update the label from "Active Controller" to something more explicit. Some suggestions include:

"Active Controller Broker ID"
"Active Controller (Broker ID)"

These alternatives would help differentiate between the count of controllers and the identifier of the controller broker.

Thanks for your consideration!