# Left Rail Navigation Shell

## Module
Web

## Status
IMPLEMENTED

## Description
CSS Grid-based application shell with persistent left sidebar navigation (7 nav sections), replacing the previous mega-menu navigation pattern.

## Implementation Details
- **Feature directory**: `src/Web/StellaOps.Web/src/app/layout/app-sidebar/`
- **Components**:
  - `app-sidebar` (`src/Web/StellaOps.Web/src/app/layout/app-sidebar/app-sidebar.component.ts`)
  - `sidebar-nav-group` (`src/Web/StellaOps.Web/src/app/layout/app-sidebar/sidebar-nav-group.component.ts`)
  - `sidebar-nav-item` (`src/Web/StellaOps.Web/src/app/layout/app-sidebar/sidebar-nav-item.component.ts`)
- **Source**: SPRINT_20260118_001_FE_shell_navigation_redesign.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 the component renders correctly with sample data
  - [ ] Verify interactive elements respond to user input
  - [ ] Verify data is fetched and displayed from the correct API endpoints
- **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)