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/assets/i18n/en.json

@@ -44,7 +44,7 @@
   "dashboard": {
     "header": "Find services",
     "searchbox_placeholder": "Enter the service you are looking for",
-    "slogan": "Everything begins with a search",
+    "slogan": "It all starts with a search",
     "welcome": "Welcome"
   },
 
@@ -62,6 +62,7 @@
     "header_1": "Postulated",
     "header_2": "Confirmed",
     "header_3": "Finished",
+    "header_4": "Reported",
     "parent": "Extra charge from service: ",
     "status": "Status",
     "rate": "Rate",
@@ -73,7 +74,7 @@
     "validate": "Validate",
     "hire_info_1": "You are about to hire",
     "hire_info_2": "to provide the service you have requested.",
-    "hire_pay": "Please select with which card do you want to pay the service and enter the CVV of the card to continue.",
+    "hire_pay": "Please select which card do you want to pay the service with, and enter the CVV of the card to continue.",
     "hire_confirm": "Hire service",
     "coupon": "Coupon",
     "no_home": "Not at home",
@@ -178,6 +179,12 @@
     "faq_9.1": "Phone numbers so you can contact each other and the user names."
   },
 
+  "reports": {
+    "header": "My Reports",
+    "company": "Company",
+    "empty": "You have no reports registered"
+  },
+
   "alerts": {
     "login": "Logged In",
     "login_error": "Wrong email or password",