[Init] Initial commit - NetMesh terminal manager

application/state/useApplicationBackend.ts

@@ -0,0 +1,49 @@
+import { useCallback } from "react";
+import { netcattyBridge } from "../../infrastructure/services/netcattyBridge";
+
+export type ApplicationInfo = {
+  name: string;
+  version: string;
+  platform: string;
+};
+
+export type SshAgentStatus = {
+  running: boolean;
+  startupType: string | null;
+  error: string | null;
+};
+
+export const useApplicationBackend = () => {
+  const openExternal = useCallback(async (url: string) => {
+    const bridge = netcattyBridge.get();
+    if (bridge?.openExternal) {
+      // Bridge resolves on success (either via system browser or in-app
+      // fallback window) and rejects only when both paths fail. Let the
+      // rejection propagate so callers can present a user-facing message.
+      await bridge.openExternal(url);
+      return;
+    }
+    // Fallback for non-Electron environments (tests, dev server, etc.).
+    window.open(url, "_blank", "noopener,noreferrer");
+  }, []);
+
+  const getApplicationInfo = useCallback(async (): Promise<ApplicationInfo | null> => {
+    const bridge = netcattyBridge.get();
+    const info = await bridge?.getAppInfo?.();
+    return info ?? null;
+  }, []);
+
+  const checkSshAgent = useCallback(async (options?: {
+    identityAgent?: string;
+    agentForwarding?: boolean;
+    hostname?: string;
+    port?: number;
+    username?: string;
+  }): Promise<SshAgentStatus | null> => {
+    const bridge = netcattyBridge.get();
+    const status = await bridge?.checkSshAgent?.(options);
+    return status ?? null;
+  }, []);
+
+  return { openExternal, getApplicationInfo, checkSshAgent };
+};