feat: 添加MinIO文件系统支持并优化外部连接器功能

- 添加MinIO用户文件系统配置选项(BEAVER_MINIO_ROOT_USER等)
- 更新外部连接器配置结构，包括BASE_URL和认证令牌设置
- 改进connector provider支持更多类型(official, feishu_bot等)
- 实现Mistral模型推理模式支持reasoning_effort参数
- 增强外部连接器策略配置和运行时配置管理
- 添加connector bridge事件验证和安全保护机制
- 优化任务路由逻辑，区分simple_chat和new_task场景
- 更新初始技能工具提示配置，分离authoring admin功能

app-instance/frontend/lib/channel-connectors.test.ts

@@ -1,6 +1,7 @@
 import { afterEach, describe, expect, it, vi } from 'vitest';
 
 import {
+  listChannelConnections,
   getChannelConnectorSession,
   listChannelConnectors,
   startChannelConnectorSession,
@@ -38,6 +39,18 @@ describe('channel connector api', () => {
     expect(String(firstFetchCall(fetchMock)[0])).toMatch(/\/api\/channel-connectors$/);
   });
 
+  it('lists existing channel connections', async () => {
+    const fetchMock = vi.fn(() =>
+      mockJsonResponse([{ connection_id: 'conn_1', channel_id: 'weixin-1', kind: 'weixin', status: 'connected' }])
+    );
+    globalThis.fetch = fetchMock as typeof fetch;
+
+    const connections = await listChannelConnections();
+
+    expect(connections[0].status).toBe('connected');
+    expect(String(firstFetchCall(fetchMock)[0])).toMatch(/\/api\/channel-connections$/);
+  });
+
   it('starts a connector session with options', async () => {
     const fetchMock = vi.fn(() =>
       mockJsonResponse({