I propose to modify the notation method when the LAG of Consumer Group is 0.

[K-Diger]

Issue submitter TODO list

• I've looked up my issue in FAQ
• I've searched for an already existing issues here
• I've tried running main-labeled docker image and the issue still persists there
• I'm running a supported version of the application which is listed here

Describe the bug (actual behavior)

In the "Consumers" tab, there were cases where the LAG value for consumers was N/A.

However, when queried using the describe CLI command, LAG was displayed as 0.

I believe that N/A can also be accepted as "Not Available", so I would like to modify it to display 0.

Expected behavior

In the "Consumers" tab, if the consumer's LAG is 0, it is displayed as 0 instead of N/A.

Your installation details

name: kafka-ui
services:
kakfa-ui:
image: provectuslabs/kafka-ui:v0.7.2
container_name: kakfa-ui
ports:
- '80:8080'
environment:
- KAFKA_CLUSTERS_0_NAME=kafka_cluster
- KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS=localhost:29092,localhost:29092,localhost:29092
- DYNAMIC_CONFIG_ENABLED=true
- KAFKA_CLUSTERS_0_AUDIT_TOPICAUDITENABLED=true
- KAFKA_CLUSTERS_0_AUDIT_CONSOLEAUDITENABLED=true

Steps to reproduce

You can just consume a message to the topic without anything special or start the consumer without any message.

Screenshots

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Logs

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Additional context

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