# Vuln Explorer with Evidence Tree and Citation Links

## Module
Web

## Status
VERIFIED

## Description
Vulnerability exploration surface with evidence tree navigation, citation-link rendering, evidence subgraph visualization, triage action cards, verdict explanation rendering, and URL-synchronized triage preset filters.

## Implementation Details
- **Feature directory**: `src/Web/StellaOps.Web/src/app/features/vuln-explorer/`
- **Primary components**:
  - `citation-link` (`src/Web/StellaOps.Web/src/app/features/vuln-explorer/components/citation-link/citation-link.component.ts`)
  - `evidence-subgraph` (`src/Web/StellaOps.Web/src/app/features/vuln-explorer/components/evidence-subgraph/evidence-subgraph.component.ts`)
  - `evidence-tree` (`src/Web/StellaOps.Web/src/app/features/vuln-explorer/components/evidence-tree/evidence-tree.component.ts`)
  - `filter-preset-pills` (`src/Web/StellaOps.Web/src/app/features/vuln-explorer/components/filter-preset-pills/filter-preset-pills.component.ts`)
  - `triage-card` (`src/Web/StellaOps.Web/src/app/features/vuln-explorer/components/triage-card/triage-card.component.ts`)
  - `triage-filters` (`src/Web/StellaOps.Web/src/app/features/vuln-explorer/components/triage-filters/triage-filters.component.ts`)
  - `verdict-explanation` (`src/Web/StellaOps.Web/src/app/features/vuln-explorer/components/verdict-explanation/verdict-explanation.component.ts`)
- **Services**:
  - `evidence-subgraph` (`src/Web/StellaOps.Web/src/app/features/vuln-explorer/services/evidence-subgraph.service.ts`)
  - `filter-url-sync` (`src/Web/StellaOps.Web/src/app/features/vuln-explorer/services/filter-url-sync.service.ts`)
- **Models**:
  - `src/Web/StellaOps.Web/src/app/features/vuln-explorer/components/filter-preset-pills/filter-preset.models.ts`
  - `src/Web/StellaOps.Web/src/app/features/vuln-explorer/models/evidence-subgraph.models.ts`
- **Mounted user surface**:
  - `src/Web/StellaOps.Web/src/app/features/vulnerabilities/vulnerability-detail.component.html`
  - `src/Web/StellaOps.Web/src/app/features/vulnerabilities/vulnerability-detail.component.ts`
- **Behavior coverage**:
  - `src/Web/StellaOps.Web/src/tests/vuln_explorer/vuln-explorer-with-evidence-tree-and-citation-links.behavior.spec.ts`
  - `src/Web/StellaOps.Web/src/tests/vuln_explorer/filter-preset-pills-with-url-synchronization.component.spec.ts`
- **Source**: Feature matrix scan

## E2E Test Plan
- **Setup**:
  - [ ] Log in with a user that has appropriate permissions
  - [ ] Navigate to `/vulnerabilities` and open a vulnerability detail page
  - [ ] Ensure finding/evidence data exists for selected vulnerability
- **Core verification**:
  - [ ] Verify evidence explorer section is present on vulnerability detail page
  - [ ] Verify citation links expand/collapse and expose source metadata
  - [ ] Verify verdict explanation renders reasoning and action affordances
  - [ ] Verify filter preset pills apply/reset/copy URL synchronization behavior
- **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 ID: `docs/qa/feature-checks/runs/web/vuln-explorer-with-evidence-tree-and-citation-links/run-001/`
- Date (UTC): 2026-02-11
- Tier 0: PASS (all referenced vuln-explorer paths exist; user-route mounting gap fixed by wiring evidence explorer section into vulnerability detail page).
- Tier 1: PASS (`npm run test` focused + vuln_explorer regression include suite passed; `npm run build` passed with baseline workspace warnings only).
- Tier 2: PASS (citation-link behavior, verdict explanation interactions, and filter-preset URL-sync behavior verified through supported Angular behavior harnesses in `src/tests/**`).