# Policy Gates Preview with Air-Gap Mode and Feed Freshness

## Module
Web

## Status
VERIFIED

## Description
Policy gates preview panel with air-gap mode toggle (sealed/connected with offline verification status), feed freshness status badges (fresh/warning/stale counts), bundle simulation for promotions, gate simulation results display, and policy profile selection.

## Implementation Details
- **Feature directory**: `src/Web/StellaOps.Web/src/app/features/policy-gates/`
- **Routes**: `policy-gates.routes.ts`
- **Components**:
  - `airgap-mode-switch` (`src/Web/StellaOps.Web/src/app/features/policy-gates/components/airgap-mode-switch/airgap-mode-switch.component.ts`)
  - `bundle-simulator` (`src/Web/StellaOps.Web/src/app/features/policy-gates/components/bundle-simulator/bundle-simulator.component.ts`)
  - `feed-freshness-badges` (`src/Web/StellaOps.Web/src/app/features/policy-gates/components/feed-freshness-badges/feed-freshness-badges.component.ts`)
  - `gate-simulation-results` (`src/Web/StellaOps.Web/src/app/features/policy-gates/components/gate-simulation-results/gate-simulation-results.component.ts`)
  - `policy-preview-panel` (`src/Web/StellaOps.Web/src/app/features/policy-gates/components/policy-preview-panel/policy-preview-panel.component.ts`)
  - `profile-selector` (`src/Web/StellaOps.Web/src/app/features/policy-gates/components/profile-selector/profile-selector.component.ts`)
- **Source**: Feature matrix scan

## E2E Test Plan
- **Setup**:
  - [ ] Log in with a user that has appropriate permissions
  - [ ] Navigate to `/policy`
  - [ ] 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)