# MI3 - Latency/Idle/Load Patterns (Skeletons, Progress, Offline Banners)

## Module
Web

## Status
VERIFIED

## Description
Skeleton loading placeholders with multiple variants, offline banner with retry button and connection status, and offline mode service for detecting/managing connectivity state.

## Implementation Details
- **Feature directory**: `src/Web/StellaOps.Web/src/app/features/core/`
- **Components**:
  - `extension-slot` (`src/Web/StellaOps.Web/src/app/core/plugins/extension-slots/extension-slot.component.ts`)
- **Services**:
  - `evidence-panel-metrics` (`src/Web/StellaOps.Web/src/app/core/analytics/evidence-panel-metrics.service.ts`)
  - `gateway-metrics` (`src/Web/StellaOps.Web/src/app/core/api/gateway-metrics.service.ts`)
  - `policy-interop` (`src/Web/StellaOps.Web/src/app/core/api/policy-interop.service.ts`)
  - `reachability-integration` (`src/Web/StellaOps.Web/src/app/core/api/reachability-integration.service.ts`)
  - `vuln-export-orchestrator` (`src/Web/StellaOps.Web/src/app/core/api/vuln-export-orchestrator.service.ts`)
  - `abac` (`src/Web/StellaOps.Web/src/app/core/auth/abac.service.ts`)
  - `auth-storage` (`src/Web/StellaOps.Web/src/app/core/auth/auth-storage.service.ts`)
  - `auth` (`src/Web/StellaOps.Web/src/app/core/auth/auth.service.ts`)
  - `authority-auth` (`src/Web/StellaOps.Web/src/app/core/auth/authority-auth.service.ts`)
  - `dpop` (`src/Web/StellaOps.Web/src/app/core/auth/dpop/dpop.service.ts`)
- **Models**:
  - `src/Web/StellaOps.Web/src/app/core/api/advisories.models.ts`
  - `src/Web/StellaOps.Web/src/app/core/api/advisory-ai.models.ts`
  - `src/Web/StellaOps.Web/src/app/core/api/ai-runs.models.ts`
  - `src/Web/StellaOps.Web/src/app/core/api/analytics.models.ts`
  - `src/Web/StellaOps.Web/src/app/core/api/aoc.models.ts`
- **Source**: Feature matrix scan

## 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)

## Verification
- Run: `docs/qa/feature-checks/runs/web/mi3-latency-idle-load-patterns/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): `2026-02-11T08:37:58.7612207Z`