refactor: make IpcEvent an interface (from type)

src/declarations/electron.d.ts

@@ -1,8 +1,8 @@
 import WebContents = Electron.WebContents;
 
-declare type IpcEvent = {
+declare interface IIpcEvent {
   frameId: number;
   preventDefault: () => void;
   reply: (channel: string, ...args: any) => void;
   sender: WebContents;
-};
+}

src/main/controllers/api.ts

@@ -3,7 +3,7 @@ import { isLoggedIn, login } from '../services/nhentai-crawler';
 
 const ipcServer: IIpcServer = {
   answer: (channel: IpcChannels, handler: (data?: any) => Promise<any>): void => {
-    ipcMain.on(channel, (event: IpcEvent, payload: IIpcPayload) => {
+    ipcMain.on(channel, (event: IIpcEvent, payload: IIpcPayload) => {
       handler(payload.data)
         .then((result: any) => {
           const response: IIpcResponse = {