### What problem does this PR solve?
Remove 'DID YOU KNOW', when start front-end
### Type of change
- [x] Refactoring
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
### What problem does this PR solve?
feat: Support for conversational streaming
#709
### Type of change
- [x] New Feature (non-breaking change which adds functionality)