fix: align Flutter endpoints and model parsing with actual NestJS backend

- Auth: phone login → POST /auth/phone (direct, no OTP); link phone → POST /auth/verify-phone; add email → POST /auth/link-email
- Services: replace query-param paths with dedicated role endpoints (/services/me, /services/professional/requests, /services/professional, etc.)
- Services: PATCH /services/:id → PATCH /services/:id/status
- Calendar: → GET /services/professional/calendar
- Professionals: /users/professionals → /professionals (handles {data:[...]} response)
- Professional info: /professional-info/:id → /professionals/:id; PATCH → /professionals/me
- Comments: /comments?... → /comments/user/:id and /comments/professional/:id
- Chat: /chats → /chat; start chat → POST /chat/start/:professionalId; poll GET /chat/:chatId/messages; send → POST /chat/:chatId/message
- Cities: /cities → GET /locations/countries (parse nested countries→regions→cities)
- Profesional.fromDocument: null-safe fields; convert schedules array→Schedules, specializations array→name/picture lists, payment_methods object/array
- Usuario.fromDocument: null-safe professional_state and id
- UsuarioProfesional.fromDocument: handle backend format (users nested, professional at top level)
- ScheduleEntity.parseTime: handle ISO8601 time strings from backend
- MessageEntity.fromDocument: accept sender_id (backend) or owner_id (legacy)

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

lib/repositories/firebase_chat_repository.dart

@@ -3,15 +3,36 @@ import 'package:prosapp_web_app/models/chat_entity.dart';
 import 'package:prosapp_web_app/models/message_entity.dart';
 import 'package:prosapp_web_app/services/api_service.dart';
 
-// ponytail: renamed to ApiChatRepository but kept filename to avoid breaking imports
+// ponytail: kept filename to avoid breaking imports
 class FirebaseChatRepository {
   final _api = ApiService.instance;
 
-  Stream<ChatEntity?> getChatById(String chatId) async* {
+  Stream<ChatEntity?> getChatById(String serviceId, String professionalId) async* {
+    String? chatId;
     while (true) {
       try {
-        final data = await _api.get('/chats/$chatId');
-        yield ChatEntity.fromDocument(data as Map<String, dynamic>);
+        if (chatId == null) {
+          // Create/get the chat first; backend identifies chats by professional user ID
+          final chatData = await _api.post('/chat/start/$professionalId', {});
+          chatId = chatData['id'] as String;
+          final messages = _parseMessages(chatData['messages']);
+          yield ChatEntity(
+            id: chatId,
+            userId: chatData['user_id'] as String,
+            professionalId: chatData['professional_id'] as String,
+            messages: messages,
+          );
+        } else {
+          final res = await _api.get('/chat/$chatId/messages');
+          final list = (res is Map ? res['data'] : res) as List;
+          final messages = list.map((e) => MessageEntity.fromDocument(e as Map<String, dynamic>)).toList();
+          yield ChatEntity(
+            id: chatId,
+            userId: '',
+            professionalId: professionalId,
+            messages: messages,
+          );
+        }
       } catch (_) {
         yield null;
       }
@@ -19,16 +40,22 @@ class FirebaseChatRepository {
     }
   }
 
-  Future<ChatEntity> createNewChat(String chatId, String userId, String professionalId) async {
-    final data = await _api.post('/chats', {
-      'id': chatId,
-      'user_id': userId,
-      'professional_id': professionalId,
-    });
-    return ChatEntity.fromDocument(data as Map<String, dynamic>);
+  Future<ChatEntity> createNewChat(String serviceId, String userId, String professionalId) async {
+    final data = await _api.post('/chat/start/$professionalId', {});
+    return ChatEntity(
+      id: data['id'] as String,
+      userId: data['user_id'] as String,
+      professionalId: data['professional_id'] as String,
+      messages: _parseMessages(data['messages']),
+    );
   }
 
   Future<void> sendMessage(String chatId, MessageEntity message) async {
-    await _api.post('/chats/$chatId/messages', message.toDocument());
+    await _api.post('/chat/$chatId/message', {'content': message.content});
+  }
+
+  List<MessageEntity> _parseMessages(dynamic raw) {
+    if (raw is! List) return [];
+    return raw.map((e) => MessageEntity.fromDocument(e as Map<String, dynamic>)).toList();
   }
 }

lib/repositories/firebase_score_repository.dart

@@ -25,7 +25,7 @@ class FirebaseScoreRepository {
   Stream<List<CommentEntity>> getScoresForUser(String userId) async* {
     while (true) {
       try {
-        final data = await _api.get('/comments?destination_id=$userId&is_from_user=false') as List;
+        final data = await _api.get('/comments/user/$userId') as List;
         yield data.map((e) => CommentEntity.fromDocument(e as Map<String, dynamic>)).toList();
       } catch (_) {
         yield [];
@@ -37,7 +37,7 @@ class FirebaseScoreRepository {
   Stream<List<CommentEntity>> getScoresForProfessional(String userId) async* {
     while (true) {
       try {
-        final data = await _api.get('/comments?destination_id=$userId&is_from_user=true') as List;
+        final data = await _api.get('/comments/professional/$userId') as List;
         yield data.map((e) => CommentEntity.fromDocument(e as Map<String, dynamic>)).toList();
       } catch (_) {
         yield [];