feat(simulation): add worker-gated 3d polygon workspace

apps/control-station/src/core/polygon/usePolygonWorkerCapability.ts

@@ -0,0 +1,58 @@
+import { useEffect, useState } from "react";
+
+import {
+  fetchPolygonWorkerStatus,
+  type PolygonWorkerStatus,
+} from "./liveWorker";
+
+export interface PolygonWorkerCapability {
+  checked: boolean;
+  available: boolean;
+  status: PolygonWorkerStatus | null;
+}
+
+const initialCapability: PolygonWorkerCapability = {
+  checked: false,
+  available: false,
+  status: null,
+};
+
+export function usePolygonWorkerCapability(): PolygonWorkerCapability {
+  const [capability, setCapability] = useState(initialCapability);
+
+  useEffect(() => {
+    const controller = new AbortController();
+    let timer: number | null = null;
+
+    const poll = async () => {
+      try {
+        const status = await fetchPolygonWorkerStatus({ signal: controller.signal });
+        if (controller.signal.aborted) return;
+        setCapability({
+          checked: true,
+          available: status.available,
+          status,
+        });
+      } catch {
+        if (controller.signal.aborted) return;
+        setCapability({
+          checked: true,
+          available: false,
+          status: null,
+        });
+      } finally {
+        if (!controller.signal.aborted) {
+          timer = window.setTimeout(() => void poll(), 3_000);
+        }
+      }
+    };
+
+    void poll();
+    return () => {
+      controller.abort();
+      if (timer !== null) window.clearTimeout(timer);
+    };
+  }, []);
+
+  return capability;
+}