add unit test coverage for UserComputingUnitListItemComponent

[mengw15]

Task Summary

frontend/src/app/dashboard/component/user/user-computing-unit/user-computing-unit-list-item/user-computing-unit-list-item.component.ts (codecov ~9%, no spec) — add a behavior-focused Vitest spec (TestBed + detectChanges()). See frontend/TESTING.md and the user-dataset-list-item spec (#5230) for the pattern; mock ComputingUnitService, NotificationService, ComputingUnitStatusService, ComputingUnitActionsService.

Behavior to cover

• should create — instantiates; fixture.detectChanges() renders the template
• entry @input / unit getter — expose the bound value
• confirmUpdateUnitName(cuid, newName):
  • invalid name (via validateName) -> notificationService.error(validationError) + cancels editing; no rename call
  • valid -> calls computingUnitService.renameComputingUnit(cuid, trimmedName); on success -> notificationService.success("Successfully renamed computing unit"), updates entry.computingUnit.name when the cuid matches, calls refreshComputingUnitList(); on error -> notificationService.error("Failed to rename computing unit: ...")
• onClickOpenShareAccess(cuid) -> calls computingUnitActionsService.openShareAccessModal(cuid, false)
• @Output() deleted — emits on the delete flow

Task Type

• Refactor / Cleanup
• DevOps / Deployment / CI
• Testing / QA
• Documentation
• Performance
• Other