feat: Reportes, chat de discusión y mejoras de navegación

- Tab "Reportados" en Contratos (cliente) y tab "Reportadas" en Postulaciones (proveedor) con skeleton loading e ionViewWillEnter
- Modal de chat para discusión de reportes: burbujas por rol (propio/otro/moderador), skeleton, input con cámara y envío
- Endpoints GET/POST contracts/reports/{id}/comments en ichamba.service
- userId guardado en AuthService desde auth/user para identificar mensajes propios
- Botón "Postularse" corregido con slot=end en ion-item
- Todas las secciones de tabs migradas de ngOnInit a ionViewWillEnter + ChangeDetectorRef.detectChanges()
- Android navigation bar reactiva al tema del sistema vía values/values-night styles.xml

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/pages/postulations/already/already.page.ts

@@ -1,4 +1,4 @@
-import { Component, OnInit } from '@angular/core';
+import { Component, ChangeDetectorRef } from '@angular/core';
 import { MenuController, NavController } from '@ionic/angular';
 import { EventService } from '../../../services/event.service';
 import { EnvService } from 'src/app/services/env.service';
@@ -13,10 +13,11 @@ import { Browser } from '@capacitor/browser';
   styleUrls: ['./already.page.scss'],
   standalone: false
 })
-export class AlreadyPage implements OnInit {
+export class AlreadyPage {
 
   postulations: any[] = [];
   postulations_dates: any[] = [];
+  loading = true;
 
   constructor(
     private menu: MenuController,
@@ -26,13 +27,15 @@ export class AlreadyPage implements OnInit {
     private alertService: AlertService,
     private ichambaService: IchambaService,
     private env: EnvService,
+    private cdr: ChangeDetectorRef,
   ) {
     this.events.subscribe('refreshpostulations', (data) => {
       this.getpostulations();
     });
   }
 
-  ngOnInit() {
+  ionViewWillEnter() {
+    this.loading = true;
     this.getpostulations();
   }
 
@@ -40,9 +43,11 @@ export class AlreadyPage implements OnInit {
     this.ichambaService.getContractedPostulation().subscribe(
       data => {
         this.postulations = data;
+        this.postulations_dates = [];
         for (var i of this.postulations) {
-          this.postulations_dates.push(new Date((new Date(i.date).toLocaleString('en-US') + ' UTC').replace("," ,"")).toLocaleDateString('es-US', { weekday: 'long', year: 'numeric', month: 'short', day: 'numeric', hour: 'numeric', minute:'numeric', timeZoneName: 'long'}));
+          this.postulations_dates.push(new Date((new Date(i.date).toLocaleString('en-US') + ' UTC').replace(',', '')).toLocaleDateString('es-US', { weekday: 'long', year: 'numeric', month: 'short', day: 'numeric', hour: 'numeric', minute: 'numeric', timeZoneName: 'long' }));
         }
+        this.cdr.detectChanges();
         event.target.complete();
       }, error => {
         this.alertService.presentToast("Por favor contacte a soporte técnico, Estatus:" + error['status']);
@@ -54,10 +59,14 @@ export class AlreadyPage implements OnInit {
     this.ichambaService.getContractedPostulation().subscribe(
       data => {
         this.postulations = data;
+        this.postulations_dates = [];
         for (var i of this.postulations) {
-          this.postulations_dates.push(new Date((new Date(i.date).toLocaleString('en-US') + ' UTC').replace("," ,"")).toLocaleDateString('es-US', { weekday: 'long', year: 'numeric', month: 'short', day: 'numeric', hour: 'numeric', minute:'numeric', timeZoneName: 'long'}));
+          this.postulations_dates.push(new Date((new Date(i.date).toLocaleString('en-US') + ' UTC').replace(',', '')).toLocaleDateString('es-US', { weekday: 'long', year: 'numeric', month: 'short', day: 'numeric', hour: 'numeric', minute: 'numeric', timeZoneName: 'long' }));
         }
+        this.loading = false;
+        this.cdr.detectChanges();
       }, error => {
+        this.loading = false;
         this.alertService.presentToast("Por favor contacte a soporte técnico, Estatus:" + error['status']);
       });
   }