feat(planning): consolidate recorded-route localization and spatial scene

Preserve the completed teach-and-repeat laboratory stage: reference preparation, cascaded acquisition, local tracking and recovery, recording lifecycle, replay qualification, and persistent Rerun scene controls. Document the open grid-picking regression and Rerun upgrade contract. No autonomous driving or loop-closure optimization is claimed.

apps/control-station/src/App.tsx

@@ -27,6 +27,8 @@ import { SystemNavigationPanel } from "./components/system/SystemNavigationPanel
 import { SystemWorkspaceSelector } from "./components/system/SystemWorkspaceSelector";
 import { useComputeContourSettings } from "./components/system/useComputeContourSettings";
 import { useApplicationPanelActions } from "./components/useApplicationPanelActions";
+import { useSessionOverviewMode } from "./core/observation/useSessionOverview";
+import { SessionOverviewWorkspace } from "./workspaces/recordings/SessionOverviewWorkspace";
 import { useEnvironmentSettings } from "./core/environment/useEnvironmentSettings";
 import { useDevicePluginHost } from "./core/device-plugins/DevicePluginHost";
 import { useMissionRuntime } from "./core/runtime/MissionRuntimeContext";
@@ -150,6 +152,7 @@ export default function App() {
   );
   const [environmentSettingsOpen, setEnvironmentSettingsOpen] = useState(false);
   const [sourceUrl, setSourceUrl] = useState("");
+  const [workspaceHeaderToolsHost, setWorkspaceHeaderToolsHost] = useState<HTMLDivElement | null>(null);
   const [recordedReplay, setRecordedReplay] = useState<ObservationSessionReplayLaunch | null>(null);
   const [recordedReplayLabel, setRecordedReplayLabel] = useState<string | null>(null);
   const [replayTransitioning, setReplayTransitioning] = useState(false);
@@ -609,6 +612,7 @@ export default function App() {
   }, [layoutSaveNotice]);
 
   const [fleetCreateRequest, setFleetCreateRequest] = useState(0);
+  const sessionOverview = useSessionOverviewMode(activeDefinition?.kind === "recordings");
   const onAddVehicle = useCallback(() => setFleetCreateRequest(value => value + 1), []);
   const contentActions = useApplicationPanelActions({
     onAddVehicle,
@@ -619,6 +623,7 @@ export default function App() {
     saveWorkspaceLayout,
     workspaceLayoutSaving: workspaceLayoutProfile.state === "saving",
     systemUtilityActions: computeContourSettings.utilityActions,
+    sessionOverview: { ...sessionOverview, available: Boolean(recordedReplay && replayPresented && !sourceSwitchBlocked) },
   });
 
   const header = (
@@ -781,6 +786,8 @@ export default function App() {
                     settleRecordedReplaySwitch(outcome)}
                   onDeleteBegin={releaseRecordedReplayForDelete}
                 />
+              ) : activeDefinition.kind === "missions" ? (
+                <div ref={setWorkspaceHeaderToolsHost} />
               ) : activeDefinition.kind === "vehicles" ? null : activeDefinition.kind === "datasets" ? (
                 <StatusBadge tone="neutral">Offline evaluation</StatusBadge>
               ) : activeDefinition.kind === "lab-archive" ? (
@@ -804,10 +811,13 @@ export default function App() {
                 onOpenSpatialScene={() => openView("spatial-scene")}
                 onActivateAutomaticSpatialSource={activateAutomaticSpatialSource}
               />
+            ) : activeDefinition.kind === "recordings" && sessionOverview.open && recordedReplay && replayPresented ? (
+              <SessionOverviewWorkspace key={recordedReplay.sessionId} sessionId={recordedReplay.sessionId} />
             ) : (
               <WorkspaceRenderer
                 definition={activeDefinition}
                 fleetCreateRequest={fleetCreateRequest}
+                headerToolsHost={workspaceHeaderToolsHost}
                 state={activeRuntimeState}
                 backendStatus={runtime.backendStatus}
                 sourceUrl={effectiveSourceUrl}