[8/n] Core feature bug fixes

[likawind]

Describe your changes and why you are making these changes

This PR adds bug fixes to core features for workflow details page.

The followings are working now:

• View wf dag diagram (with each node's status)
• select versions
• view each node's details
• browse between nodes
• edit workflow
• delete workflow
• trigger workflow, with / without parameters

Tests pending:

• switch between versions with different dag structure
• switch between versions with different succeed / fail states
• delete workflow with saved objects
• view workflow with no runs

  Related issue number (if any)

Loom demo (if any)

Checklist before requesting a review

• [ ] I have created a descriptive PR title. The PR title should complete the sentence "This PR...".
• [ ] I have performed a self-review of my code.
• [ ] I have included a small demo of the changes. For the UI, this would be a screenshot or a Loom video.
• [ ] If this is a new feature, I have added unit tests and integration tests.
• [ ] I have run the integration tests locally and they are passing.
• [ ] I have run the linter script locally (See python3 scripts/run_linters.py -h for usage).
• [ ] All features on the UI continue to work correctly.
• [ ] Added one of the following CI labels:
  • run_integration_test: Runs integration tests
  • skip_integration_test: Skips integration tests (Should be used when changes are ONLY documentation/UI)