AI配置化

lib/api/ai_api.dart

@@ -6,6 +6,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../core/network/api_exception.dart';
 import '../core/network/dio_client.dart';
 import '../models/ai.dart';
+import '../models/ai_config.dart';
 import '../models/json_util.dart';
 
 final aiApiProvider = Provider<AiApi>((ref) => AiApi(ref.watch(dioProvider)));
@@ -67,12 +68,13 @@ class AiApi {
   /// （`event: xxx` / `data: {...}` / 空行分隔），手动解析比多引一个依赖可控。
   ///
   /// 注意：[sessionId] 传 null 表示开新会话，会话 ID 会由后端在 done 事件里返回。
-  Stream<AiEvent> chat({int? sessionId, required String content}) async* {
+  Stream<AiEvent> chat({int? sessionId, int? configId, required String content}) async* {
     final Response<ResponseBody> res;
     try {
       res = await _dio.post<ResponseBody>(
         '/ai/chat',
-        data: {'sessionId': sessionId, 'content': content},
+        // configId 传 null = 用服务端 .env 里那套（列表里虚拟的「默认」项）
+        data: {'sessionId': sessionId, 'configId': configId, 'content': content},
         options: Options(
           responseType: ResponseType.stream,
           // LLM 生成慢 + 工具循环可能跑好几轮，给足；后端 SseEmitter 是 180s
@@ -131,6 +133,73 @@ class AiApi {
     }
   }
 
+  // ---------------------------------------------------------------- AI 配置
+
+  /// 配置列表。后端把虚拟的「默认」项放在第一位（id 为 null）。
+  Future<List<AiConfigItem>> configs() async {
+    try {
+      final res = await _dio.get('/ai/configs');
+      final data = res.data;
+      if (data is! List) return const [];
+      return asMapList(data).map(AiConfigItem.fromJson).toList();
+    } on DioException catch (e) {
+      final err = e.error;
+      throw err is ApiException ? err : ApiException(-1, '配置列表加载失败');
+    }
+  }
+
+  /// 新增。创建时 apiKey 必填。
+  Future<AiConfigItem> createConfig({
+    required String name,
+    required String baseUrl,
+    required String apiKey,
+    required String model,
+  }) async {
+    try {
+      final res = await _dio.post('/ai/configs', data: {
+        'name': name,
+        'baseUrl': baseUrl,
+        'apiKey': apiKey,
+        'model': model,
+      });
+      return AiConfigItem.fromJson(Map<String, dynamic>.from(res.data as Map));
+    } on DioException catch (e) {
+      final err = e.error;
+      throw err is ApiException ? err : ApiException(-1, '保存失败');
+    }
+  }
+
+  /// 更新。[apiKey] 传空表示不改动 —— App 只有掩码，不该被迫重新输入 key。
+  Future<AiConfigItem> updateConfig({
+    required int id,
+    required String name,
+    required String baseUrl,
+    required String model,
+    String? apiKey,
+  }) async {
+    try {
+      final res = await _dio.put('/ai/configs/$id', data: {
+        'name': name,
+        'baseUrl': baseUrl,
+        'model': model,
+        if (apiKey != null && apiKey.isNotEmpty) 'apiKey': apiKey,
+      });
+      return AiConfigItem.fromJson(Map<String, dynamic>.from(res.data as Map));
+    } on DioException catch (e) {
+      final err = e.error;
+      throw err is ApiException ? err : ApiException(-1, '保存失败');
+    }
+  }
+
+  Future<void> deleteConfig(int id) async {
+    try {
+      await _dio.delete('/ai/configs/$id');
+    } on DioException catch (e) {
+      final err = e.error;
+      throw err is ApiException ? err : ApiException(-1, '删除失败');
+    }
+  }
+
   AiEvent? _parseEvent(String event, String payload) {
     final decoded = jsonDecode(payload);
     if (decoded is! Map<String, dynamic>) return null;