Smart-Diff UI Components (Visual Diffs)

Module

Web

Status

IMPLEMENTED

Description

Full visual diff UI with three-pane layout (categories, items, proof), delta summary strip, compare view, VEX merge explanation visualization, proof pane, export actions, and smart-diff badges. Matches the advisory's specified UI patterns.

Implementation Details

Feature directory: src/Web/StellaOps.Web/src/app/shared/components/smart-diff-badge/
Components:
- smart-diff-badge (src/Web/StellaOps.Web/src/app/shared/components/smart-diff-badge/smart-diff-badge.component.ts)
Source: Feature matrix scan

E2E Test Plan

Setup:
- Log in with a user that has appropriate permissions
- Navigate to the relevant page/section where this feature appears
- Ensure test data exists (scanned artifacts, SBOM data, or seed data as needed)
Core verification:
- Verify side-by-side comparison view renders correctly with two versions
- Verify additions, removals, and changes are visually highlighted
- Verify diff data matches the expected delta between versions
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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