# Node Diff Table Component (Tabular SBOM Change Comparison)

## Module
Web

## Status
VERIFIED

## Description
Tabular SBOM component-change diff view with change-type filter chips, debounced search, multi-column sorting, row selection with bulk actions, pagination, clipboard actions, and CSV export for lineage comparisons.

## Implementation Details
- **Feature directory**: `src/Web/StellaOps.Web/src/app/features/lineage/components/node-diff-table/`
- **Primary component**:
  - `diff-table.component.ts`
  - `diff-table.component.html`
  - `diff-table.component.scss`
  - `models/diff-table.models.ts`
- **Service dependency**:
  - `src/Web/StellaOps.Web/src/app/features/lineage/services/lineage-graph.service.ts`
- **Behavioral tests**:
  - `src/Web/StellaOps.Web/src/tests/lineage/node-diff-table-component.spec.ts`

## E2E Test Plan
- **Setup**:
  - [ ] Log in with a user that has appropriate permissions
  - [ ] Navigate to lineage comparison workflow hosting the node diff table
  - [ ] Ensure comparison data exists (added/removed/changed components)
- **Core verification**:
  - [ ] Verify component rows render and sort deterministically
  - [ ] Verify search is debounced and filter chips (including both-changed) work
  - [ ] Verify bulk actions, pagination, and API-input based diff fetch behavior
- **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)

## Verification
- Run: `docs/qa/feature-checks/runs/web/node-diff-table-component/run-001/`
- Tier 0 (source): pass (`tier0-source-check.json`)
- Tier 1 (build/tests): pass (`tier1-build-check.json`)
- Tier 2 (behavior): pass (`tier2-e2e-check.json`)
- Verified on (UTC): `2026-02-11T09:03:08.3546412Z`