AI人设可以配置

lib/providers/ai_provider.dart

@@ -4,6 +4,7 @@ import '../api/ai_api.dart';
 import '../core/network/api_exception.dart';
 import '../models/ai.dart';
 import 'ai_config_provider.dart';
+import 'ai_persona_provider.dart';
 import 'bill_refresh.dart';
 import 'note_provider.dart';
 
@@ -160,9 +161,14 @@ class AssistantNotifier extends Notifier<AssistantState> {
     try {
       // 带上用户选中的配置。null = 用服务端 .env 那套（虚拟的「默认」项）
       final configId = ref.read(selectedAiConfigProvider);
-      await for (final event in ref
-          .read(aiApiProvider)
-          .chat(sessionId: state.sessionId, configId: configId, content: trimmed)) {
+      // 人设是独立的另一套。null = 用服务端内置的默认人设
+      final personaId = ref.read(selectedAiPersonaProvider);
+      await for (final event in ref.read(aiApiProvider).chat(
+            sessionId: state.sessionId,
+            configId: configId,
+            personaId: personaId,
+            content: trimmed,
+          )) {
         if (!ref.mounted) return;
 
         switch (event.type) {