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docs/features/checked/web/patch-map-explorer.md

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+# Patch Map Explorer (Heatmap UI)
+
+## Module
+Web
+
+## Status
+VERIFIED
+
+## Description
+Interactive CSS Grid heatmap showing vendor backport patch coverage across fleet with drill-down to function-level breakdown and paginated affected images. Three API endpoints: aggregated coverage, function-level details, and matching images.
+
+## Implementation Details
+- **Feature directory**: `src/Web/StellaOps.Web/src/app/features/binary-index/`
+- **Components**:
+  - `binary-index-ops` (`src/Web/StellaOps.Web/src/app/features/binary-index/binary-index-ops.component.ts`)
+  - `patch-map` (`src/Web/StellaOps.Web/src/app/features/binary-index/patch-map.component.ts`)
+- **Verification harness**:
+  - `src/Web/StellaOps.Web/src/tests/binary_index/patch-map.component.spec.ts`
+- **Source**: SPRINT_20260103_001_FE_preset_pills_patch_map.md
+
+## E2E Test Plan
+- **Setup**:
+  - [ ] Log in with a user that has appropriate permissions
+  - [ ] Navigate to `/analyze/patch-map`
+  - [ ] 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/patch-map-explorer/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): `2026-02-11T10:06:47.9174079Z`