feat(ui): ship release promotions cutover

docs/modules/ui/implementation_plan.md

@@ -34,6 +34,7 @@ Provide a living plan for UI deliverables, dependencies, and evidence.
 - `docs/features/checked/web/topology-trust-administration-ui.md` - shipped verification note for canonical topology and trust setup shells, repaired settings/admin/platform aliases, and platform-setup handoffs.
 - `docs/features/checked/web/security-operations-leaves-ui.md` - shipped verification note for mission alerts/activity surfacing, unknowns route repair, notifications ownership, and legacy security alias cutover.
 - `docs/features/checked/web/platform-setup-canonical-route-preservation-ui.md` - shipped verification note for preserved `/ops/platform-setup/*` URLs during the shared setup/topology cutover.
+- `docs/features/checked/web/release-promotions-cutover-ui.md` - shipped verification note for canonical release promotions routing, alias cutover, release-context wizard handoff, and end-to-end request submission.
 - `docs/modules/ui/reachability-witnessing/README.md` - detailed witness and proof UX dossier plus cross-shell deep-link contract.
 - `docs/modules/ui/platform-ops-consolidation/README.md` - detailed Operations overview taxonomy and legacy absorption plan.
 - `docs/modules/ui/offline-operations/README.md` - detailed owner-shell contract for Offline Kit, Feeds & Airgap, Evidence handoffs, and stale alias policy.
@@ -42,6 +43,7 @@ Provide a living plan for UI deliverables, dependencies, and evidence.
 - `docs/modules/ui/topology-trust-administration/README.md` - canonical setup owner contract for topology inventory, trust administration, legacy trust redirects, and platform-setup handoffs.
 - `docs/modules/ui/security-operations-leaves/README.md` - canonical owner contract for mission alerts/activity, security unknowns, notifications, and stale `/analyze`/`/notify` handoffs.
 - `docs/modules/ui/platform-setup-canonical-route-preservation/README.md` - preserved route contract for canonical `/ops/platform-setup/*` leaves during the shared setup/topology cutover.
+- `docs/modules/ui/release-promotions-cutover/README.md` - canonical promotions owner contract, alias rules, and release-context handoff for the Releases shell.
 - `docs/modules/ui/triage-explainability-workspace/README.md` - detailed artifact workspace and audit-bundle UX dossier.
 - `docs/modules/ui/workflow-visualization-replay/README.md` - detailed run-detail graph, timeline, replay, and evidence UX dossier.
 - `docs/modules/ui/contextual-actions-patterns/README.md` - shared placement contract for stray actions, pages, drawers, and tabs.