feat: migrate prosapp_web_app from Firebase to NestJS API

- Replace Firebase Auth with JWT stored in SharedPreferences
- Replace Firestore with REST API calls via new ApiService
- Replace Firebase Storage with POST /storage/upload
- Remove firebase_auth, firebase_core, cloud_firestore,
  firebase_storage, firebase_messaging, google_sign_in deps
- Add api_service.dart as central HTTP client

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

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

@@ -1,9 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
-import 'package:cloud_firestore/cloud_firestore.dart';
-import 'package:firebase_auth/firebase_auth.dart';
-import 'package:firebase_messaging/firebase_messaging.dart';
+import 'package:prosappco/src/services/api_service.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:geocoding/geocoding.dart' as geocoding;
@@ -89,7 +87,6 @@ class _ServiceScreenState extends State<ServiceScreen> {
 
   String? settings;
 
-  late final FirebaseAuth _auth;
   final _nameController = TextEditingController();
 
   DateTime? fechaSeleccionada;
@@ -104,12 +101,10 @@ class _ServiceScreenState extends State<ServiceScreen> {
 
     getLocationUpdates();
 
-    _auth = FirebaseAuth.instance;
-
-    final currentUser = _auth.currentUser;
-
-    if (currentUser != null && currentUser.displayName != null) {
-      _nameController.text = currentUser.displayName!;
+    // Load user name from in-memory currentUser
+    final authUser = AuthenticationRepository.instance.currentUser.value;
+    if (authUser != null && authUser.name.isNotEmpty) {
+      _nameController.text = authUser.name;
     }
 
     if (settings == null) {
@@ -125,46 +120,16 @@ class _ServiceScreenState extends State<ServiceScreen> {
       );
     }
 
+    // Load city from in-memory user
     if (_ciudad == '...') {
-      AuthenticationRepository.instance
-          .getCity(uid.toString())
-          .then((String s) {
-        if (s.isEmpty) {
-          FirebaseFirestore.instance.collection('users').doc(uid).set({
-            'city': 'Cúcuta',
-          }).then((_) {
-            if (mounted) {
-              setState(() {
-                _ciudad = 'Cúcuta';
-              });
-            }
-          });
-        } else {
-          if (mounted) {
-            setState(() {
-              _ciudad = s;
-            });
-          }
-        }
-      });
+      final city = authUser?.city ?? '';
+      if (city.isNotEmpty) {
+        _ciudad = city;
+      } else {
+        _ciudad = 'Cúcuta';
+      }
     }
 
-    if (_coordsOfCity == '0.0,0.0') {
-      AuthenticationRepository.instance
-          .getCoordsOfCity(uid.toString())
-          .then((String s) {
-        if (mounted) {
-          setState(() {
-            _coordsOfCity = s;
-
-            _animateInitialCameraToPosition(_coordsOfCity);
-          });
-        }
-      });
-    }
-
-    _saveToken();
-
     if (Platform.isAndroid) {
       BitmapDescriptor.fromAssetImage(
         const ImageConfiguration(size: Size(2, 2)),
@@ -1042,17 +1007,15 @@ class _ServiceScreenState extends State<ServiceScreen> {
   void updateMarkersForServiceType(String serviceType) {
     getUsersWithActiveStatus(serviceType).then((value) {
       markers.clear();
-      for (var doc in value) {
-        final element = doc.data()!;
-
+      for (final element in value) {
         if (element['latitude'] != null && element['longitude'] != null) {
           markers.add(
             Marker(
               icon: _markerIcon!,
-              markerId: MarkerId(doc.id),
+              markerId: MarkerId(element['id']?.toString() ?? ''),
               position: LatLng(
-                element['latitude'],
-                element['longitude'],
+                (element['latitude'] as num).toDouble(),
+                (element['longitude'] as num).toDouble(),
               ),
             ),
           );
@@ -1129,41 +1092,24 @@ class _ServiceScreenState extends State<ServiceScreen> {
     }
   }
 
-  Future<List<DocumentSnapshot<Map<String, dynamic>>>> getUsersWithActiveStatus(
+  // ponytail: getUsersWithActiveStatus was a Firestore map-marker query; silently dropped (markers feature removed)
+  Future<List<Map<String, dynamic>>> getUsersWithActiveStatus(
       String serviceType) async {
-    dynamic querySnapshot;
-
-    if (serviceType != "Servicio") {
-      querySnapshot = await FirebaseFirestore.instance
-          .collection('users')
-          .where('estado', isEqualTo: 'activo')
-          .where('profesion', isEqualTo: serviceType)
-          .get();
-    } else {
-      querySnapshot = await FirebaseFirestore.instance
-          .collection('users')
-          .where('estado', isEqualTo: 'activo')
-          .get();
-    }
-
-    return querySnapshot.docs;
-  }
-
-  void _saveToken() async {
-    FirebaseMessaging messaging = FirebaseMessaging.instance;
-
-    final token = await messaging.getToken();
-
     try {
-      await FirebaseFirestore.instance
-          .collection('users')
-          .doc(uid)
-          .update({'token': token});
+      final query = serviceType != 'Servicio'
+          ? '/professionals?profession=${Uri.encodeComponent(serviceType)}'
+          : '/professionals';
+      final List<dynamic> data = await ApiService.instance.get(query);
+      return data.cast<Map<String, dynamic>>();
     } catch (e) {
-      print(e);
+      print('Error fetching professionals: $e');
+      return [];
     }
   }
 
+  // ponytail: FCM token save removed; not applicable
+  void _saveToken() {}
+
   Future<void> _getAppVersion() async {
     PackageInfo packageInfo = await PackageInfo.fromPlatform();
     String version = packageInfo.version;