# Backport Resolution UI with Function Diff Viewer

## Module
Web

## Status
IMPLEMENTED

## Description
Frontend UI for browsing binary backport resolution results. Includes a ResolutionChipComponent (showing resolved/unresolved status), an EvidenceDrawerComponent (side panel with proof artifacts), and a FunctionDiffComponent (displaying function-level binary diffs between patched and unpatched versions). Integrates into the vulnerability detail view with e2e test coverage.

## Implementation Details
- **Feature directory**: `src/Web/StellaOps.Web/src/app/shared/components/function-diff/`
- **Components**:
  - `function-diff` (`src/Web/StellaOps.Web/src/app/shared/components/function-diff/function-diff.component.ts`)
- **Source**: SPRINT_1227_0003_0001_FE_backport_ui.md

## 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)