feat(ui): adopt policy components on decisioning surfaces [SPRINT-019]

Wire PolicyEvaluatePanel, RemediationHint, and PolicyPackEditor into
policy-decisioning gates page and policy-studio editor within the
canonical /ops/policy shell.

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

docs/features/checked/web/orphan-policy-component-adoption.md

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+# Orphan Policy Component Adoption
+
+Sprint: SPRINT_20260308_019_FE_orphan_policy_component_adoption
+
+## Summary
+
+Revived three dormant shared policy widgets by adopting them on mounted canonical surfaces inside the `/ops/policy` shell:
+
+1. **PolicyEvaluatePanelComponent** + **RemediationHintComponent**: Adopted on the `PolicyDecisioningGatesPageComponent` (`/ops/policy/gates/*`). The gates page now renders a structured decision banner, gate results table, and contextual remediation hints derived from its existing gate results data. The `RemediationHintComponent` is imported transitively through the evaluate panel.
+
+2. **PolicyPackEditorComponent**: Adopted as a visual gate configuration sidebar within the `PolicyEditorComponent` (`/ops/policy/packs/:packId/edit`). Operators can view and modify gates visually alongside the Monaco DSL editor. No second editor route tree was created.
+
+## Mounted hosts
+
+| Widget | Host component | Route | Adoption type |
+|---|---|---|---|
+| PolicyEvaluatePanelComponent | PolicyDecisioningGatesPageComponent | `/ops/policy/gates/*` | Inline evaluation panel |
+| RemediationHintComponent | PolicyDecisioningGatesPageComponent (via evaluate panel) | `/ops/policy/gates/*` | Transitive via evaluate panel |
+| PolicyPackEditorComponent | PolicyEditorComponent | `/ops/policy/packs/:packId/edit` | Sidebar visual config |
+
+## Exclusions
+
+| Surface | Reason |
+|---|---|
+| `features/releases/release-flow.component` | Uses bespoke `RemediationHintsComponent` with domain-specific data contract (`PolicyGateResult`/`RemediationStep` from `release.models`) including automated step triggers, copy-to-clipboard, and exception request flow. The shared `RemediationHintComponent` does not support these features. |
+| Policy Studio as a separate navigation branch | Explicitly excluded per sprint scope - canonical policy shell only. |
+
+## Data contracts
+
+- `PolicyEvaluateResponse` (from `policy-interop.models.ts`): gates page derives this from its existing `GateResult[]` via a computed signal.
+- `PolicyPackDocument` (from `policy-interop.models.ts`): editor derives this from the loaded `PolicyPack` metadata.
+- `RemediationHint` (from `policy-interop.models.ts`): consumed transitively through the evaluate panel.
+
+## Test coverage
+
+- `policy-decisioning-gates-page.component.spec.ts`: Verifies policyEvaluateResult derivation, gate mapping, remediation hints, decision computation, and template rendering of the shared panel.
+- `policy-editor-pack-editor.component.spec.ts`: Verifies packDocument derivation, template rendering of the shared pack editor, and change handler.
+
+## Files changed
+
+- `src/Web/StellaOps.Web/src/app/features/policy-decisioning/policy-decisioning-gates-page.component.ts`
+- `src/Web/StellaOps.Web/src/app/features/policy-studio/editor/policy-editor.component.ts`
+- `src/Web/StellaOps.Web/src/app/features/policy-decisioning/policy-decisioning-gates-page.component.spec.ts` (new)
+- `src/Web/StellaOps.Web/src/app/features/policy-studio/editor/policy-editor-pack-editor.component.spec.ts` (new)