semi implemented and features implemented save checkpoint

docs/features/unchecked/web/proof-ledger-view.md

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+# Proof Ledger View (Merkle Tree Scan History)
+
+## Module
+Web
+
+## Status
+IMPLEMENTED
+
+## Description
+Interactive proof ledger displaying scan proof history with Merkle tree visualization, proof bundle download, and a Score Replay Dashboard for triggering and monitoring deterministic score replay operations with before/after comparison.
+
+## Implementation Details
+- **Feature directory**: `src/Web/StellaOps.Web/src/app/features/proof-chain/`
+- **Components**:
+  - `proof-detail-panel` (`src/Web/StellaOps.Web/src/app/features/proof-chain/components/proof-detail-panel.component.ts`)
+  - `verification-badge` (`src/Web/StellaOps.Web/src/app/features/proof-chain/components/verification-badge.component.ts`)
+  - `proof-chain` (`src/Web/StellaOps.Web/src/app/features/proof-chain/proof-chain.component.ts`)
+- **Services**:
+  - `proof-chain` (`src/Web/StellaOps.Web/src/app/features/proof-chain/proof-chain.service.ts`)
+- **Models**:
+  - `src/Web/StellaOps.Web/src/app/features/proof-chain/proof-chain.models.ts`
+- **Source**: Feature matrix scan
+
+## E2E Test Plan
+- **Setup**:
+  - [ ] Log in with a user that has appropriate permissions
+  - [ ] Navigate to `/proofs/:subjectDigest`
+  - [ ] 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)