feat: implement IPTV settings management with streaming and display preferences

lib/core/services/settings_api_service.dart

@@ -0,0 +1,51 @@
+import 'dart:convert';
+import 'package:http/http.dart' as http;
+import 'dart:html' as html;
+import '../models/app_user.dart';
+
+class SettingsApiService {
+  final String _baseUrl = html.window.location.origin;
+
+  Future<Map<String, dynamic>?> getSettings() async {
+    final token = html.window.localStorage['auth_token'];
+    if (token == null) return null;
+
+    try {
+      final response = await http.get(
+        Uri.parse('$_baseUrl/api/settings'),
+        headers: {
+          'Authorization': 'Bearer $token',
+          'Content-Type': 'application/json',
+        },
+      );
+
+      if (response.statusCode == 200) {
+        if (response.body.isEmpty) return {};
+        return jsonDecode(response.body) as Map<String, dynamic>;
+      }
+      return null;
+    } catch (e) {
+      return null;
+    }
+  }
+
+  Future<bool> saveSettings(Map<String, dynamic> settings) async {
+    final token = html.window.localStorage['auth_token'];
+    if (token == null) return false;
+
+    try {
+      final response = await http.post(
+        Uri.parse('$_baseUrl/api/settings'),
+        headers: {
+          'Authorization': 'Bearer $token',
+          'Content-Type': 'application/json',
+        },
+        body: jsonEncode(settings),
+      );
+
+      return response.statusCode == 200;
+    } catch (e) {
+      return false;
+    }
+  }
+}