fix: remove font_awesome_flutter (incompatible with Dart 3.12)

Replace FaIcon(FontAwesomeIcons.google) with plain Text widget.
Remove font_awesome_flutter from pubspec — package extends final
class IconData which is forbidden in Dart 3.12/Flutter 3.44.
Fix currentUser.value → currentUser (was Rx<UserModel?>, now UserModel?).

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

lib/src/components/drawer_professional.dart

@@ -50,7 +50,7 @@ class _DrawerProfessionalState extends State<DrawerProfessional> {
   Widget build(BuildContext context) {
     // Use in-memory currentUser — no Firebase needed
     final UserModel? currentUser =
-        AuthenticationRepository.instance.currentUser.value;
+        AuthenticationRepository.instance.currentUser;
 
     return Drawer(
       child: Container(

lib/src/presentation/screens/login/login_email.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
-import 'package:font_awesome_flutter/font_awesome_flutter.dart';
 import 'package:prosappco/src/authentication/authentication_repository.dart';
 import 'package:prosappco/src/components/bottom_sheet.dart';
 import 'package:prosappco/src/presentation/widgets/shared/primary_button.dart';
@@ -113,7 +112,7 @@ class _LoginEmailScreenState extends State<LoginEmailScreen> {
                                     ),
                                   ),
                                   SizedBox(width: 5),
-                                  FaIcon(FontAwesomeIcons.google),
+                                  const Text('G', style: TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 18)),
                                 ],
                               )),
                         )

lib/src/presentation/screens/map/service.dart

@@ -102,7 +102,7 @@ class _ServiceScreenState extends State<ServiceScreen> {
     getLocationUpdates();
 
     // Load user name from in-memory currentUser
-    final authUser = AuthenticationRepository.instance.currentUser.value;
+    final authUser = AuthenticationRepository.instance.currentUser;
     if (authUser != null && authUser.name.isNotEmpty) {
       _nameController.text = authUser.name;
     }

lib/src/presentation/screens/professional_profile.dart

@@ -36,7 +36,7 @@ class ProfessionalProfileScreenState extends State<ProfessionalProfileScreen> {
   @override
   void initState() {
     super.initState();
-    final currentUser = AuthenticationRepository.instance.currentUser.value;
+    final currentUser = AuthenticationRepository.instance.currentUser;
     _photoUrl = currentUser?.picture;
     _profession = currentUser?.profession ?? '...';
 

lib/src/presentation/screens/professional_profile_web.dart

@@ -45,7 +45,7 @@ class _ProfessionalProfileWebScreenState
   @override
   void initState() {
     super.initState();
-    final currentUser = AuthenticationRepository.instance.currentUser.value;
+    final currentUser = AuthenticationRepository.instance.currentUser;
     _photoUrl = currentUser?.picture;
     _profession = currentUser?.profession ?? '...';
 

lib/src/presentation/screens/profile/profile.dart

@@ -60,7 +60,7 @@ class _ProfileScreenState extends State<ProfileScreen> {
   }
 
   Future<void> _loadCurrentUser() async {
-    final currentUser = AuthenticationRepository.instance.currentUser.value;
+    final currentUser = AuthenticationRepository.instance.currentUser;
     if (currentUser != null) {
       _nameController.text = currentUser.name;
       _emailController.text = currentUser.email ?? '';

lib/src/presentation/screens/service_web.dart

@@ -142,7 +142,7 @@ class _ServiceOldScreenState extends State<ServiceWebScreen> {
     super.initState();
 
     // Load city from in-memory user
-    final currentUser = AuthenticationRepository.instance.currentUser.value;
+    final currentUser = AuthenticationRepository.instance.currentUser;
     _ciudad = currentUser?.city ?? '...';
 
     BitmapDescriptor.fromAssetImage(