feat(data): add HTTP remote datasource

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/data/datasources/pokemon_remote_datasource.dart

@@ -0,0 +1,46 @@
+import 'dart:convert';
+import 'package:http/http.dart' as http;
+import '../../core/config/app_constants.dart';
+import '../../core/logger.dart';
+import '../../domain/entities/pokemon.dart';
+import '../dto/pokemon_dto.dart';
+
+/// Accès distant à l'API Tyradex.
+class PokemonRemoteDataSource {
+  final http.Client _client;
+
+  PokemonRemoteDataSource({http.Client? client})
+      : _client = client ?? http.Client();
+
+  Future<Pokemon> getById(int id) async {
+    AppLogger.info('API: fetching Pokémon $id');
+    final response = await _client
+        .get(Uri.https(AppConstants.apiBaseUrl, '${AppConstants.apiPokemonPath}/$id'));
+    if (response.statusCode != 200) {
+      throw Exception(
+          'Erreur récupération du pokémon $id, code ${response.statusCode}');
+    }
+    final json = jsonDecode(response.body) as Map<String, dynamic>;
+    return PokemonDto.fromTyradexJson(json, fallbackId: id);
+  }
+
+  Future<List<Pokemon>> getAll() async {
+    AppLogger.info('API: fetching ALL Pokémon');
+    final response = await _client
+        .get(Uri.https(AppConstants.apiBaseUrl, AppConstants.apiPokemonPath));
+    if (response.statusCode != 200) {
+      throw Exception('Failed to load pokemon (code ${response.statusCode})');
+    }
+    final List<dynamic> jsonList = jsonDecode(response.body);
+    final result = <Pokemon>[];
+    for (final json in jsonList) {
+      if (json['pokedex_id'] == 0) continue; // entrée générique Tyradex
+      try {
+        result.add(PokemonDto.fromTyradexJson(json as Map<String, dynamic>));
+      } catch (e, st) {
+        AppLogger.error('Parsing pokemon échoué: ${json['name']}', e, st);
+      }
+    }
+    return result;
+  }
+}