feat: introduce device plugin runtime boundary

apps/control-station/src/components/LandingStage.tsx

@@ -1,13 +1,13 @@
 import { Button, Icon, StatusBadge } from "@nodedc/ui-react";
 
+import type { BackendStatus, RuntimePhase } from "../core/runtime/contracts";
 import type { RootDefinition } from "../productModel";
 import { backendLabel, backendTone, phaseLabel, phaseTone } from "../presentation";
-import type { BackendStatus } from "../useK1Console";
 
 export interface LandingStageProps {
   root: RootDefinition | null;
   backendStatus: BackendStatus;
-  phase?: string | null;
+  phase?: RuntimePhase | null;
   message?: string | null;
   onOpenObservation: () => void;
   onOpenDevice: () => void;