Aias00 opened a new issue, #1207:
URL: https://github.com/apache/rocketmq-dashboard/issues/1207

   ## Problem
   
   When `examineConsumeStats(group, topic)` fails, `RocketMQMetadataProvider` 
returns a `TopicConsumerVO` with `consumeTps=0` and `diffTotal=0`. The Topic 
consumer table cannot distinguish that failure from a real idle consumer with 
zero lag.
   
   ## Scope
   
   - Add an explicit metrics-availability field to the Topic consumer response 
contract.
   - Set it false when per-group consume stats cannot be read.
   - Render unavailable TPS and lag distinctly in the Topic consumer table.
   - Add backend and frontend regression coverage.
   
   ## Track
   
   Track 1: Control Plane runtime diagnostics.


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