[GH] (texera/gh-readonly-queue/main/pr-6695-ddd4e3d20eef17a232067d68c46e026bbcaf5aed): Workflow run "Required Checks" is working again!

[GitBox <gi...@apache.org>]

The GitHub Actions job "Required Checks" on texera.git/gh-readonly-queue/main/pr-6695-ddd4e3d20eef17a232067d68c46e026bbcaf5aed has succeeded.
Run started by GitHub user aglinxinyuan (triggered by aglinxinyuan).

Head commit for run:
27dbc095b2e5253c19a256a6d5e1147f9cbb9016 / Matthew B. <mg...@uci.edu>
test(frontend): cover getDefaultLinkCell (#6695)

### What changes were proposed in this PR?
- Add coverage for JointUIService.getDefaultLinkCell (manhattan router,
rounded connector).
- Assert the connection stroke, hidden remove tool, and source and
target marker attributes.
### Any related issues, documentation, discussions?
Closes: #6694
### How was this PR tested?
- Run: `cd frontend && node --max-old-space-size=8192
./node_modules/nx/dist/bin/nx.js test gui --watch=false
--include=src/app/workspace/service/joint-ui/joint-ui.service.spec.ts`,
expect the suite passing.
- Test-only change; no production code is modified.
### Was this PR authored or co-authored using generative AI tooling?
Co-authored with Claude Opus 4.8 in compliance with ASF

Report URL: https://github.com/apache/texera/actions/runs/29883724141

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