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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

• v0.7.2 (by DockerHub)

• with docker compose

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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