Add spec coverage for landing-page.component.ts

[Ma77Ball]

Task Summary

Create landing-page.component.spec.ts for frontend/src/app/hub/component/landing-page/landing-page.component.ts.

Behavior to cover:

• Constructor — subscribes to UserService.userChanged(); on emission updates isLogin and currentUid.
• ngOnInit — calls getWorkflowCount() and loadTops().
• getWorkflowCount — calls HubService.getCount(EntityType.Workflow) and HubService.getCount(EntityType.Dataset) and assigns to workflowCount / datasetCount.
• loadTops — awaits Promise.all of getTopLovedEntries for Workflow [Like, Clone] and Dataset [Like]; assigns topLovedWorkflows, topClonedWorkflows, topLovedDatasets; logs and swallows errors via console.error.
• getTopLovedEntries — calls HubService.getTops, then for each requested action type extends the items via SearchService.extendSearchResultsWithHubActivityInfo(items, true, ["access"]); returns map keyed by action.
• navigateToSearch — routes to DASHBOARD_HUB_WORKFLOW_RESULT for "workflow", DASHBOARD_HUB_DATASET_RESULT for "dataset", and DASHBOARD_HOME for unknown types.

Task Type

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

[Ma77Ball]

/take