Upgrade: Angular 18, Ionic 8, Capacitor 6

Modernizacion completa del frontend:

- Angular 8 -> 18.2.14
- Ionic 4 -> 8.7.17
- Capacitor 6.x (migracion desde Cordova/@ionic-native)
- TypeScript 5.4.5
- Swiper 11 con Web Components API

Cambios principales:
- Migrar NativeStorage a @capacitor/preferences
- Migrar InAppBrowser a @capacitor/browser
- Migrar Camera a @capacitor/camera
- Migrar Geolocation a @capacitor/geolocation
- Migrar StatusBar/SplashScreen a Capacitor
- Migrar Facebook/Google login a plugins Capacitor
- Actualizar lazy loading syntax (Angular 12+)
- Configurar buildOptimizer: false para Ionic 8
- Limpiar package.json de dependencias obsoletas
- Agregar README con guia de instalacion

Co-Authored-By: Claude <noreply@anthropic.com>

src/app/pages/contracts/pending/pending.page.ts

@@ -1,5 +1,6 @@
 import { Component, OnInit } from '@angular/core';
-import { ModalController, MenuController, NavController, Events } from '@ionic/angular';
+import { ModalController, MenuController, NavController } from '@ionic/angular';
+import { EventService } from '../../../services/event.service';
 import { EnvService } from 'src/app/services/env.service';
 import { AuthService } from 'src/app/services/auth.service';
 import { IchambaService } from 'src/app/services/ichamba.service';
@@ -22,7 +23,7 @@ export class PendingPage implements OnInit {
     private modalController: ModalController,
     private menu: MenuController,
     private navCtrl: NavController,
-    private events: Events,
+    private events: EventService,
     private authService: AuthService,
     private alertService: AlertService,
     private ichambaService: IchambaService,