Snapshot Merge Preview with K4 Lattice Visualization and Determinism Verification

Module

Web

Status

IMPLEMENTED

Description

Snapshot management UI with merge preview showing per-CVE source contributions with trust scores, K4 lattice visualization, merge traces, missing evidence indicators, REPLAY.yaml format for deterministic replay, and verify-determinism component. (Merged with Snapshot Merge Preview from Phase 2 AirGap section.)

Implementation Details

Feature directory: src/Web/StellaOps.Web/src/app/shared/components/lattice-diagram/
Components:
- lattice-diagram (src/Web/StellaOps.Web/src/app/shared/components/lattice-diagram/lattice-diagram.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 the visualization renders correctly with sample data
- Verify interactive elements (hover tooltips, click-to-drill-down) work
- Verify the visualization handles empty/minimal data gracefully
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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