### What problem does this PR solve?
Feat: Modify the default style of the agent node anchor #9869
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Replace color variables according to design draft #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Fix: Fixed the issue that variables defined in the begin operator cannot
be referenced in the switch operator. #3221
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Feat: Display agent version in pages #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Display agent history versions #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
