semi implemented and features implemented save checkpoint

docs/features/unchecked/web/triage-inbox-angular-component.md

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+# Triage Inbox Angular Component (3-Pane Layout)
+
+## Module
+Web
+
+## Status
+IMPLEMENTED
+
+## Description
+3-pane Angular UI for exploit-path-based triage: left pane (path list with risk badges, quiet/active toggle, search), center pane (CVE list, package/symbol info, entry point, exceptions), right pane (collapsible reach graph, symbol map, VEX claims, export). Uses Cytoscape.js for graph visualization.
+
+## Implementation Details
+- **Feature directory**: `src/Web/StellaOps.Web/src/app/` (search for related components)
+- **Source**: SPRINT_3900_0003_0001_exploit_path_inbox_proof_bundles.md
+
+## E2E Test Plan
+- **Setup**:
+  - [ ] Log in with a user that has appropriate permissions
+  - [ ] Navigate to `/triage/artifacts`
+  - [ ] Ensure test data exists (scanned artifacts, SBOM data, or seed data as needed)
+- **Core verification**:
+  - [ ] Verify the triage list loads with findings/items to review
+  - [ ] Verify triaging actions (accept, dismiss, override) update item status
+  - [ ] Verify keyboard shortcuts work for rapid triage navigation
+- **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)