FirstSignalCard Component (Prefetch, SSE Updates, Storybook)

Module

Web

Status

IMPLEMENTED

Description

FirstSignalCard Angular component with prefetch service for fast initial signal delivery, signal store, API client, SSE updates showing summary + next action buttons, Storybook stories, and unit tests.

Implementation Details

Feature directory: src/Web/StellaOps.Web/src/app/features/runs/
Components:
- first-signal-card (src/Web/StellaOps.Web/src/app/features/runs/components/first-signal-card/first-signal-card.component.ts)
Services:
- first-signal-prefetch (src/Web/StellaOps.Web/src/app/features/runs/services/first-signal-prefetch.service.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)

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