fix(web): ship degraded search readiness state

docs/modules/ui/implementation_plan.md

@@ -31,6 +31,7 @@ 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/findings-compare-baseline-availability-ui.md` - shipped verification note for the truthful no-baseline findings compare state, disabled export behavior, live findings detail list, and removed stale audit export action.
+- `docs/features/checked/web/search-readiness-degraded-answer-state-ui.md` - shipped verification note for truthful degraded-readiness search copy when suggestion viability is unavailable and the active response reports zero indexed matches.
 - `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/features/checked/web/evidence-capsules-canonical-cutover-ui.md` - shipped verification note for canonical Evidence-owned capsule routes, `/evidence-packs*` bookmark repair, and AI/release context handoffs.