fix(k1): harden live handoff and camera recovery

apps/control-station/src/App.tsx

@@ -50,6 +50,7 @@ import type {
 } from "./core/observation/sessionArchive";
 import { useRecordedSessionAdmission } from "./core/observation/useRecordedSessionAdmission";
 import { useWorkspaceLayoutProfile } from "./core/observation/useWorkspaceLayoutProfile";
+import { viewerSettingsTargetIdentity } from "./core/observation/viewerSettingsTarget";
 import { resolvePolygonRunRoute } from "./core/polygon/runArchive";
 import {
   OBSERVATION_WORKSPACE_ID,
@@ -302,14 +303,7 @@ export default function App() {
       },
     };
   }, [recordedReplay, replayPresented, replaySources, runtime.state]);
-  const viewerSettingsTargetIdentity = [
-    runtime.state?.activeDevice?.pluginId,
-    runtime.state?.activeDevice?.modelId,
-    runtime.state?.activeDevice?.instanceId,
-    runtime.state?.deviceSession?.sessionId,
-    runtime.state?.deviceSession?.deviceId,
-    runtime.state?.acquisition?.acquisitionId,
-  ].filter(Boolean).join(":") || "local-runtime";
+  const viewerSettingsTarget = viewerSettingsTargetIdentity(runtime.state);
   const observationLayout = useObservationLayout(
     activeObservationSources,
     replayPresented ? undefined : runtime.setObservationSourceActive,
@@ -389,7 +383,7 @@ export default function App() {
   useEffect(() => {
     const profile = workspaceLayoutProfile.profile;
     const applicationKey = profile
-      ? `${profile.revision}:${viewerSettingsTargetIdentity}`
+      ? `${profile.revision}:${viewerSettingsTarget}`
       : null;
     if (
       !profile ||
@@ -410,7 +404,7 @@ export default function App() {
   }, [
     runtime.backendStatus,
     runtime.updateViewerSettings,
-    viewerSettingsTargetIdentity,
+    viewerSettingsTarget,
     workspaceLayoutProfile.profile,
   ]);