### What problem does this PR solve?
Fix: The .docx file is not displaying fully; the hierarchy of the
pipeline created from the template is missing.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
api_host -> webAPI
ExternalApi -> restAPIv1
### Type of change
- [x] Refactoring
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Refactor**
* Updated internal API endpoint configuration to use consolidated base
URL constants for improved maintainability and consistency across the
application.
* **Chores**
* Updated server-side protocol validation for admin connectivity checks.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
### What problem does this PR solve?
_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._
### Type of change
- [x] Refactoring
