Cambios esteticos y de ping para el servidor

src/preload/index.ts

@@ -1,8 +1,28 @@
-import { contextBridge } from "electron";
+import { contextBridge, ipcRenderer } from "electron";
 import { electronAPI } from "@electron-toolkit/preload";
 
 // Custom APIs for renderer
-const api = {};
+const api = {
+    nfc: {
+        onTag: (callback: (event: { uid: string }) => void): void => {
+            ipcRenderer.on("nfc:tag", (_event, value) => callback(value));
+        },
+        onRemoved: (callback: (event: { uid: string }) => void): void => {
+            ipcRenderer.on("nfc:removed", (_event, value) => callback(value));
+        },
+        onError: (callback: (event: { message: string }) => void): void => {
+            ipcRenderer.on("nfc:error", (_event, value) => callback(value));
+        },
+        ping: (url: string): Promise<boolean> => {
+            return ipcRenderer.invoke("ping:url", url);
+        },
+        removeAllListeners: (): void => {
+            ipcRenderer.removeAllListeners("nfc:tag");
+            ipcRenderer.removeAllListeners("nfc:removed");
+            ipcRenderer.removeAllListeners("nfc:error");
+        },
+    },
+};
 
 // Use `contextBridge` APIs to expose Electron APIs to
 // renderer only if context isolation is enabled, otherwise