yyqdbngt opened a new pull request, #3801:
URL: https://github.com/apache/rocketmq-dashboard/pull/3801

   ### Motivation
   
   The existing `SystemGroupFilterTest` covers the canonical prefixes and 
user-group counterexamples, but the whitespace boundary and the prefix-variant 
semantics (longer names that start with a system prefix) were untested.
   
   ### Changes
   
   - `shouldTreatWhitespaceOnlyGroupAsNonSystem`: unlike null/empty, a 
whitespace-only name is not classified as a system group because the filter 
never trims input.
   - `shouldMatchSystemGroupPrefixVariants`: names that merely *start with* 
`CID_HOUSEKEEPING`, `CID_SYS_`, `CID_ONSAPI_`, `rmq_sys_` or the retry/dlq 
prefixes are system groups, while a retry marker in the middle is not.
   
   ### Verification
   
   ```
   mvn -B test -Dtest=SystemGroupFilterTest
   [INFO] Tests run: 3, Failures: 0, Errors: 0, Skipped: 0
   [INFO] BUILD SUCCESS
   ```


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