semi implemented and features implemented save checkpoint

docs/features/unchecked/web/environment-management-ui.md

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+# Environment Management UI (CRUD + Freeze Windows + Targets)
+
+## Module
+Web
+
+## Status
+IMPLEMENTED
+
+## Description
+Environment management UI with list/detail views, target health monitoring, freeze window editor, and environment settings configuration.
+
+## Implementation Details
+- **Feature directory**: `src/Web/StellaOps.Web/src/app/features/environments/`
+- **Routes**: `environments.routes.ts`
+- **Components**:
+  - `environment-detail-page` (`src/Web/StellaOps.Web/src/app/features/environments/environment-detail-page.component.ts`)
+  - `environments-list-page` (`src/Web/StellaOps.Web/src/app/features/environments/environments-list-page.component.ts`)
+- **Source**: SPRINT_20260110_111_002_FE_environment_management_ui.md
+
+## E2E Test Plan
+- **Setup**:
+  - [ ] Log in with a user that has appropriate permissions
+  - [ ] Navigate to `/release-orchestrator`
+  - [ ] 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)