Lineage UI API Wiring with Angular Signals

Module

Web

Status

IMPLEMENTED

Description

Frontend API client wiring for SBOM lineage graph with Angular signals-based state management. Connects graph visualization, diff/compare panels, and hover card overlays to the backend LineageGraphService API, including Valkey cache integration for compare operations.

Implementation Details

Feature directory: src/Web/StellaOps.Web/src/app/features/lineage/
Routes: lineage.routes.ts
Components:
- attestation-links (src/Web/StellaOps.Web/src/app/features/lineage/components/attestation-links/attestation-links.component.ts)
- audit-pack-export (src/Web/StellaOps.Web/src/app/features/lineage/components/audit-pack-export/audit-pack-export.component.ts)
- export-options (src/Web/StellaOps.Web/src/app/features/lineage/components/audit-pack-export/export-options/export-options.component.ts)
- merkle-display (src/Web/StellaOps.Web/src/app/features/lineage/components/audit-pack-export/merkle-display/merkle-display.component.ts)
- signing-options (src/Web/StellaOps.Web/src/app/features/lineage/components/audit-pack-export/signing-options/signing-options.component.ts)
- cgs-badge (src/Web/StellaOps.Web/src/app/features/lineage/components/cgs-badge/cgs-badge.component.ts)
- compare-panel (src/Web/StellaOps.Web/src/app/features/lineage/components/compare-panel/compare-panel.component.ts)
- diff-table (src/Web/StellaOps.Web/src/app/features/lineage/components/diff-table/diff-table.component.ts)
- explainer-step (src/Web/StellaOps.Web/src/app/features/lineage/components/explainer-timeline/explainer-step/explainer-step.component.ts)
- explainer-timeline (src/Web/StellaOps.Web/src/app/features/lineage/components/explainer-timeline/explainer-timeline.component.ts)
- export-dialog (src/Web/StellaOps.Web/src/app/features/lineage/components/export-dialog/export-dialog.component.ts)
- keyboard-shortcuts-help (src/Web/StellaOps.Web/src/app/features/lineage/components/keyboard-shortcuts-help/keyboard-shortcuts-help.component.ts)
- lineage-compare-panel (src/Web/StellaOps.Web/src/app/features/lineage/components/lineage-compare-panel/lineage-compare-panel.component.ts)
- lineage-compare (src/Web/StellaOps.Web/src/app/features/lineage/components/lineage-compare/lineage-compare.component.ts)
- lineage-component-diff (src/Web/StellaOps.Web/src/app/features/lineage/components/lineage-component-diff/lineage-component-diff.component.ts)
- ... and 32 more components
Services:
- audit-pack (src/Web/StellaOps.Web/src/app/features/lineage/services/audit-pack.service.ts)
- explainer (src/Web/StellaOps.Web/src/app/features/lineage/services/explainer.service.ts)
- lineage-export (src/Web/StellaOps.Web/src/app/features/lineage/services/lineage-export.service.ts)
- lineage-graph (src/Web/StellaOps.Web/src/app/features/lineage/services/lineage-graph.service.ts)
Models:
- src/Web/StellaOps.Web/src/app/features/lineage/components/audit-pack-export/models/audit-pack.models.ts
- src/Web/StellaOps.Web/src/app/features/lineage/components/diff-table/models/diff-table.models.ts
- src/Web/StellaOps.Web/src/app/features/lineage/components/explainer-timeline/models/explainer.models.ts
- src/Web/StellaOps.Web/src/app/features/lineage/components/node-diff-table/models/diff-table.models.ts
- src/Web/StellaOps.Web/src/app/features/lineage/components/pinned-explanation/models/pinned.models.ts
Source: SPRINT_20251229_005_FE_lineage_ui_wiring.md

E2E Test Plan

Setup:
- Log in with a user that has appropriate permissions
- Navigate to /lineage
- Ensure test data exists (scanned artifacts, SBOM data, or seed data as needed)
Core verification:
- Verify the component renders correctly with sample data
- Verify interactive elements respond to user input
- Verify data is fetched and displayed from the correct API endpoints
Edge cases:
- Verify graceful handling when backend API is unavailable (error state)
- Verify responsive layout at different viewport sizes
- Verify accessibility (keyboard navigation, screen reader labels, ARIA attributes)

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