feat: wire discuss button in briefing RSS cards, cap cards at 3

Adds discussArticle() to BriefingApi and wires it through to the
RSS news cards in BriefingScreen so tapping Discuss opens a chat
conversation seeded with the article. Also caps RSS cards per
message at 3 to avoid overly long briefing threads.

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

lib/data/api/briefing_api.dart

@@ -70,6 +70,22 @@ class BriefingApi {
     }
   }
 
+  /// POST /api/briefing/articles/{itemId}/discuss  body: {"conv_id": convId}
+  /// Injects the article as context and triggers LLM generation.
+  /// Returns the assistant_message_id of the generating placeholder.
+  Future<int> discussArticle(int convId, int itemId) async {
+    try {
+      final response = await _dio.post(
+        '/api/briefing/articles/$itemId/discuss',
+        data: {'conv_id': convId},
+      );
+      final data = response.data as Map<String, dynamic>;
+      return data['assistant_message_id'] as int;
+    } on DioException catch (e) {
+      throw dioToApp(e);
+    }
+  }
+
   /// DELETE /api/briefing/rss-reactions/{rssItemId}
   Future<void> deleteRssReaction(int rssItemId) async {
     try {

lib/screens/briefing/briefing_screen.dart

@@ -93,6 +93,23 @@ class _BriefingScreenState extends ConsumerState<BriefingScreen>
     }
   }
 
+  Future<void> _handleDiscuss(int convId, int itemId) async {
+    try {
+      await ref.read(briefingProvider.notifier).discussArticle(convId, itemId);
+    } on AppException catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context)
+            .showSnackBar(SnackBar(content: Text(e.message)));
+      }
+    } catch (_) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(content: Text('Failed to start discussion.')),
+        );
+      }
+    }
+  }
+
   Future<void> _handleReaction(int itemId, String reaction) async {
     final current = _reactions[itemId];
     final next = current == reaction ? null : reaction;
@@ -268,8 +285,10 @@ class _BriefingScreenState extends ConsumerState<BriefingScreen>
                             final msg = conv.messages[i];
                             return _BriefingMessageItem(
                               message: msg,
+                              convId: conv.id,
                               reactions: _reactions,
                               onReaction: _handleReaction,
+                              onDiscuss: _handleDiscuss,
                             );
                           },
                         ),
@@ -370,13 +389,17 @@ class _BriefingScreenState extends ConsumerState<BriefingScreen>
 /// and RSS reaction buttons below it (for assistant messages with metadata).
 class _BriefingMessageItem extends StatelessWidget {
   final Message message;
+  final int convId;
   final Map<int, String?> reactions;
   final void Function(int itemId, String reaction) onReaction;
+  final void Function(int convId, int itemId) onDiscuss;
 
   const _BriefingMessageItem({
     required this.message,
+    required this.convId,
     required this.reactions,
     required this.onReaction,
+    required this.onDiscuss,
   });
 
   @override
@@ -388,11 +411,11 @@ class _BriefingMessageItem extends StatelessWidget {
     final bool hasWeatherKey = isAssistant && meta != null && meta.containsKey('weather');
     final weatherData = hasWeatherKey ? meta['weather'] as Map<String, dynamic>? : null;
 
-    // RSS news cards
+    // RSS news cards — cap at 3
     final rssItemsRaw = isAssistant && meta != null
         ? (meta['rss_items'] as List<dynamic>?)?.cast<Map<String, dynamic>>() ?? []
         : <Map<String, dynamic>>[];
-    final rssItems = rssItemsRaw.map(RssItemMeta.fromJson).toList();
+    final rssItems = rssItemsRaw.map(RssItemMeta.fromJson).take(3).toList();
 
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
@@ -408,6 +431,7 @@ class _BriefingMessageItem extends StatelessWidget {
                 item: item,
                 reaction: reactions[item.id],
                 onReaction: onReaction,
+                onDiscuss: () => onDiscuss(convId, item.id),
               )).toList(),
             ),
           ),

linux/flutter/generated_plugin_registrant.cc

@@ -8,6 +8,7 @@
 
 #include <flutter_timezone/flutter_timezone_plugin.h>
 #include <open_file_linux/open_file_linux_plugin.h>
+#include <record_linux/record_linux_plugin.h>
 #include <url_launcher_linux/url_launcher_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
@@ -17,6 +18,9 @@ void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) open_file_linux_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "OpenFileLinuxPlugin");
   open_file_linux_plugin_register_with_registrar(open_file_linux_registrar);
+  g_autoptr(FlPluginRegistrar) record_linux_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "RecordLinuxPlugin");
+  record_linux_plugin_register_with_registrar(record_linux_registrar);
   g_autoptr(FlPluginRegistrar) url_launcher_linux_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "UrlLauncherPlugin");
   url_launcher_plugin_register_with_registrar(url_launcher_linux_registrar);

linux/flutter/generated_plugins.cmake

@@ -5,6 +5,7 @@
 list(APPEND FLUTTER_PLUGIN_LIST
   flutter_timezone
   open_file_linux
+  record_linux
   url_launcher_linux
 )
 

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,18 +5,24 @@
 import FlutterMacOS
 import Foundation
 
+import audio_session
 import flutter_inappwebview_macos
 import flutter_timezone
+import just_audio
 import open_file_mac
 import package_info_plus
+import record_darwin
 import shared_preferences_foundation
 import url_launcher_macos
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  AudioSessionPlugin.register(with: registry.registrar(forPlugin: "AudioSessionPlugin"))
   InAppWebViewFlutterPlugin.register(with: registry.registrar(forPlugin: "InAppWebViewFlutterPlugin"))
   FlutterTimezonePlugin.register(with: registry.registrar(forPlugin: "FlutterTimezonePlugin"))
+  JustAudioPlugin.register(with: registry.registrar(forPlugin: "JustAudioPlugin"))
   OpenFilePlugin.register(with: registry.registrar(forPlugin: "OpenFilePlugin"))
   FPPPackageInfoPlusPlugin.register(with: registry.registrar(forPlugin: "FPPPackageInfoPlusPlugin"))
+  RecordPlugin.register(with: registry.registrar(forPlugin: "RecordPlugin"))
   SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
   UrlLauncherPlugin.register(with: registry.registrar(forPlugin: "UrlLauncherPlugin"))
 }

windows/flutter/generated_plugin_registrant.cc

@@ -9,6 +9,7 @@
 #include <flutter_inappwebview_windows/flutter_inappwebview_windows_plugin_c_api.h>
 #include <flutter_timezone/flutter_timezone_plugin_c_api.h>
 #include <permission_handler_windows/permission_handler_windows_plugin.h>
+#include <record_windows/record_windows_plugin_c_api.h>
 #include <url_launcher_windows/url_launcher_windows.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
@@ -18,6 +19,8 @@ void RegisterPlugins(flutter::PluginRegistry* registry) {
       registry->GetRegistrarForPlugin("FlutterTimezonePluginCApi"));
   PermissionHandlerWindowsPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("PermissionHandlerWindowsPlugin"));
+  RecordWindowsPluginCApiRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("RecordWindowsPluginCApi"));
   UrlLauncherWindowsRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("UrlLauncherWindows"));
 }

windows/flutter/generated_plugins.cmake

@@ -6,6 +6,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
   flutter_inappwebview_windows
   flutter_timezone
   permission_handler_windows
+  record_windows
   url_launcher_windows
 )