feat: establish NekoNest Cloud control and relay

2026-08-12 23:25:43 +08:00
commit f27606b709
222 changed files with 71456 additions and 0 deletions
@@ -0,0 +1,43 @@
+"use client";
+
+import { useSyncExternalStore } from "react";
+
+function subscribeToConnectivity(onStoreChange: () => void) {
+  const handleOnline = () => onStoreChange();
+  const handleOffline = () => onStoreChange();
+
+  window.addEventListener("online", handleOnline);
+  window.addEventListener("offline", handleOffline);
+
+  return () => {
+    window.removeEventListener("online", handleOnline);
+    window.removeEventListener("offline", handleOffline);
+  };
+}
+
+function getOfflineSnapshot() {
+  return !navigator.onLine;
+}
+
+function getServerOfflineSnapshot() {
+  return false;
+}
+
+export function ConnectivityBanner() {
+  const offline = useSyncExternalStore(
+    subscribeToConnectivity,
+    getOfflineSnapshot,
+    getServerOfflineSnapshot,
+  );
+
+  if (!offline) return null;
+
+  return (
+    <div className="connectivity-banner" role="status" aria-live="polite">
+      <strong>当前设备离线</strong>
+      <span>
+        页面内容可能已经过期。恢复网络后请重新加载；已提交的操作先核对状态，避免重复。
+      </span>
+    </div>
+  );
+}