# Overlay Host Component

## Module
Web

## Status
VERIFIED

## Description
Centralized overlay/drawer management system with signal-based store for coordinating slide-in panels, modals, and drawers across the application.

## Implementation Details
- **Feature directory**: `src/Web/StellaOps.Web/src/app/layout/overlay-host/`
- **Components**:
  - `overlay-host` (`src/Web/StellaOps.Web/src/app/layout/overlay-host/overlay-host.component.ts`)
- **Store**:
  - `overlay.store` (`src/Web/StellaOps.Web/src/app/layout/overlay-host/overlay.store.ts`)
- **Verification harness**:
  - `src/Web/StellaOps.Web/src/tests/overlays/overlay-host-component.spec.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 drawer/modal overlays correctly
  - [ ] Verify escape and backdrop interactions close overlays deterministically
  - [ ] Verify open overlays receive keyboard focus for accessibility
- **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)

## Verification
- Run: `docs/qa/feature-checks/runs/web/overlay-host-component/run-001/`
- Tier 0 (source): pass (`tier0-source-check.json`)
- Tier 1 (build/tests): pass (`tier1-build-check.json`)
- Tier 2 (behavior): pass (`tier2-e2e-check.json`)
- Verified on (UTC): `2026-02-11T10:01:16.1411477Z`