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git.stella-ops.org/docs/features/unchecked/web/binary-diff-panel-ui-component.md

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# Binary-Diff Panel UI Component
## Module
Web
## Status
IMPLEMENTED
## Description
Angular component providing side-by-side binary diff visualization with scope selector (file/section/function level), hex view toggle, and integration with the binary diff backend service for patch detection review.
## Implementation Details
- **Feature directory**: `src/Web/StellaOps.Web/src/app/shared/components/binary-diff/`
- **Components**:
- `binary-diff-panel` (`src/Web/StellaOps.Web/src/app/shared/components/binary-diff/binary-diff-panel.component.ts`)
- **Source**: SPRINT_20260117_018_FE
## 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 panel/drawer opens on trigger (click, keyboard shortcut)
- [ ] Verify the panel displays the correct detail data for the selected item
- [ ] Verify the panel can be closed (X button, Escape key, backdrop click)
- **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)