feat(ui): adopt evidence proof components on mounted flows [SPRINT-018]

Wire QuickVerifyDrawer, EvidenceChecklist, ProofChainViewer, and
DsseEnvelopeViewer into evidence-export, triage, and release-orchestrator
evidence-detail surfaces for richer proof verification workflows.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/features/checked/web/orphan-evidence-proof-component-adoption.md

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+# Orphan Evidence Proof Component Adoption
+
+## Module
+Web
+
+## Status
+VERIFIED
+
+## Description
+Revival of dormant proof-verification widgets (EvidenceChecklistComponent, QuickVerifyDrawerComponent, ProofChainViewerComponent, DsseEnvelopeViewerComponent) by adopting them into already-shipped Evidence, Triage, and Releases flows. The widgets are now reachable from real operator workflows rather than orphan navigation.
+
+## Sprint
+SPRINT_20260308_018_FE_orphan_evidence_proof_component_adoption
+
+## Adopted Components and Host Surfaces
+
+### QuickVerifyDrawerComponent
+- **evidence-bundles.component.ts**: Opens from bundle verify action, passes bundle ID as artifact ID.
+- **replay-controls.component.ts**: Opens from result "Quick Verify" button, passes artifact ID from replay result.
+- **evidence-detail.component.ts**: Opens from header "Quick Verify" button, passes content hash as artifact ID.
+
+### EvidenceChecklistComponent
+- **vex-decision-modal.component.ts**: New "Required Evidence" section before Review. VexStatus is mapped to checklist status via computed property (`NOT_AFFECTED` -> `not_affected`, `UNDER_INVESTIGATION` -> `under_investigation`, `AFFECTED_*` -> `affected`, `FIXED` -> `fixed`).
+
+### ProofChainViewerComponent
+- **provenance-visualization.component.ts**: Maps `ProvenanceNode[]` to `ChainNode[]` via computed property. Filters out unknown-type nodes (finding, advisory). Renders after chain legend section.
+- **evidence-detail.component.ts**: Maps gate results + approvals to `ChainNode[]` (SBOM from first artifact, policy from gate results, approval from approvals). Renders in signature tab.
+
+### DsseEnvelopeViewerComponent
+- **triage-attestation-detail-modal.component.ts**: Replaces raw JSON section with DSSE envelope viewer. Builds `DsseEnvelope` from raw attestation data with fallback to raw JSON when data is not DSSE-shaped.
+- **evidence-detail.component.ts**: Builds `DsseEnvelope` from packet signature data. Renders in signature tab.
+
+## Implementation Details
+- **Working directory**: `src/Web/StellaOps.Web`
+- **Modified files**:
+  - `src/Web/StellaOps.Web/src/app/features/evidence-export/evidence-bundles.component.ts`
+  - `src/Web/StellaOps.Web/src/app/features/evidence-export/replay-controls.component.ts`
+  - `src/Web/StellaOps.Web/src/app/features/evidence-export/provenance-visualization.component.ts`
+  - `src/Web/StellaOps.Web/src/app/features/triage/vex-decision-modal.component.ts`
+  - `src/Web/StellaOps.Web/src/app/features/triage/vex-decision-modal.component.html`
+  - `src/Web/StellaOps.Web/src/app/features/triage/triage-attestation-detail-modal.component.ts`
+  - `src/Web/StellaOps.Web/src/app/features/triage/triage-attestation-detail-modal.component.html`
+  - `src/Web/StellaOps.Web/src/app/features/release-orchestrator/evidence/evidence-detail/evidence-detail.component.ts`
+- **New test files**:
+  - `src/Web/StellaOps.Web/src/app/features/release-orchestrator/evidence/evidence-detail/evidence-detail.component.spec.ts`
+- **Updated test files**:
+  - `src/Web/StellaOps.Web/src/app/features/triage/vex-decision-modal.component.spec.ts`
+  - `src/Web/StellaOps.Web/src/app/features/triage/triage-attestation-detail-modal.component.spec.ts`
+  - `src/Web/StellaOps.Web/src/app/features/evidence-export/evidence-bundles.component.spec.ts`
+  - `src/Web/StellaOps.Web/src/app/features/evidence-export/replay-controls.component.spec.ts`
+  - `src/Web/StellaOps.Web/src/app/features/evidence-export/provenance-visualization.component.spec.ts`
+
+## Exclusions
+- **EvidenceDrawerComponent (EvidencePacketDrawerComponent)**: Already mounted in `evidence-list.component.ts` and `evidence-center-page.component.ts`. No gap found; excluded from this sprint.
+- No new top-level routes introduced.
+- No second evidence product shell created.
+
+## Verification
+- Angular build verified clean on all modified files (pre-existing errors in policy-interop, certificate-inventory, glossary-tooltip are unrelated).
+- Focused unit tests cover all computed properties, signal states, and template rendering for each adopted widget.
+- Date (UTC): 2026-03-08