### What problem does this PR solve?
This PR removes a duplicated assignment of `tag_feas` in the
`@manager.route('/create')` API handler located in
`api/apps/chunk_app.py`.
The same conditional block was unintentionally repeated twice, which had
no
functional impact but reduced code readability and maintainability.
This change eliminates the redundancy while preserving existing
behavior.
### Type of change
- [x] Refactoring
Co-authored-by: 김경만 <kmkim7@humaxit.com>