tju-yxq opened a new pull request, #1434:
URL: https://github.com/apache/rocketmq-dashboard/pull/1434

   ## What is the purpose of the change
   
   Fixes #1433
   
   The message query did not validate that `startTime < endTime`, silently 
returning zero results for inverted time ranges.
   
   ## Brief changelog
   
   - **`RocketMQMessageProvider.java`**: Added `begin >= end` check in 
`queryMessages()`, throwing `BusinessException(400)` with a clear message.
   
   ## Verifying this change
   
   1. Set start time after end time in the message query.
   2. Before fix: zero results, no error.
   3. After fix: HTTP 400 with "Message query start time must be before end 
time".
   
   - [x] Make sure there is a Github issue filed for the change.
   - [x] Format the pull request title like `[ISSUE #1433] ...`.
   - [x] Write a pull request description that is detailed enough to understand 
what the pull request does, how, and why.
   - [x] Write necessary unit-test to verify your logic correction.
   - [x] Run `mvn -B clean apache-rat:check findbugs:findbugs 
checkstyle:checkstyle` to make sure basic checks pass.
   - [ ] If this contribution is large, please file an Apache Individual 
Contributor License Agreement.


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