feat: add NewsApi, openArticleInChat, and newsApiProvider

lib/data/api/chat_api.dart

@@ -127,4 +127,18 @@ class ChatApi {
       throw dioToApp(e);
     }
   }
+
+  /// POST /api/chat/from-article/{itemId}
+  /// Creates or retrieves a chat conversation seeded with the article.
+  /// Returns the conversation_id.
+  Future<int> openArticleInChat(int itemId) async {
+    try {
+      final response =
+          await _dio.post('/api/chat/from-article/$itemId', data: <String, dynamic>{});
+      final data = response.data as Map<String, dynamic>;
+      return data['conversation_id'] as int;
+    } on DioException catch (e) {
+      throw dioToApp(e);
+    }
+  }
 }

lib/data/api/news_api.dart

@@ -0,0 +1,52 @@
+import 'package:dio/dio.dart';
+
+import '../models/briefing_feed.dart';
+import '../models/news_item.dart';
+import 'api_client.dart';
+
+class NewsApi {
+  final Dio _dio;
+  const NewsApi(this._dio);
+
+  /// GET /api/briefing/news
+  /// Returns up to [limit] items starting at [offset], optionally filtered by [feedId].
+  Future<List<NewsItem>> getNewsItems({
+    int days = 90,
+    int limit = 40,
+    int offset = 0,
+    int? feedId,
+  }) async {
+    try {
+      final params = <String, dynamic>{
+        'days': days,
+        'limit': limit,
+        'offset': offset,
+        if (feedId != null) 'feed_id': feedId,
+      };
+      final response = await _dio.get(
+        '/api/briefing/news',
+        queryParameters: params,
+      );
+      final data = response.data as Map<String, dynamic>;
+      final list = data['items'] as List<dynamic>;
+      return list
+          .map((e) => NewsItem.fromJson(e as Map<String, dynamic>))
+          .toList();
+    } on DioException catch (e) {
+      throw dioToApp(e);
+    }
+  }
+
+  /// GET /api/briefing/feeds
+  Future<List<BriefingFeed>> getFeeds() async {
+    try {
+      final response = await _dio.get('/api/briefing/feeds');
+      final list = response.data as List<dynamic>;
+      return list
+          .map((e) => BriefingFeed.fromJson(e as Map<String, dynamic>))
+          .toList();
+    } on DioException catch (e) {
+      throw dioToApp(e);
+    }
+  }
+}

lib/providers/api_client_provider.dart

@@ -9,6 +9,7 @@ import '../data/api/chat_api.dart';
 import '../data/api/knowledge_api.dart';
 import '../data/api/voice_api.dart';
 import '../data/api/milestones_api.dart';
+import '../data/api/news_api.dart';
 import '../data/api/notes_api.dart';
 import '../data/api/projects_api.dart';
 import '../data/api/quick_capture_api.dart';
@@ -110,3 +111,7 @@ final voiceApiProvider = Provider<VoiceApi>((ref) {
 final voiceRepositoryProvider = Provider<VoiceRepository>((ref) {
   return VoiceRepository(ref.watch(voiceApiProvider));
 });
+
+final newsApiProvider = Provider<NewsApi>((ref) {
+  return NewsApi(ref.watch(dioProvider));
+});