refactor(agent): 将 Summary Model 改造为内置 Sub Agent

- 扩展 AgentMode 类型添加 'internal' 模式
- 新增 summary agent preset (claude-3-5-haiku)
- AgentRegistry 添加 getInternal/listInternalAgents 方法
- CompressionManager 添加 setSummaryModelFromAgentConfig
- Agent 构造函数改用 Registry 配置初始化 Summary 模型
- 清理旧的 SummaryConfig 配置系统
- UI AgentsPanel 分离显示 System/Preset/Custom agents
- UI AgentEditor 为 internal agent 显示简化编辑界面

packages/ui/src/api/client.ts

@@ -45,11 +45,9 @@ import type {
   CustomProviderDefinition,
   ProviderConfig,
   ConnectionTestResult,
-  // Context & Summary types
+  // Context types
   ContextUsageInfo,
   CompressionResult,
-  SummaryConfigInfo,
-  SummaryConfigInput,
 } from './types.js';
 
 // Re-export types
@@ -124,8 +122,6 @@ export type {
   CompressionStatus,
   CompressionType,
   CompressionResult,
-  SummaryConfigInfo,
-  SummaryConfigInput,
 } from './types.js';
 
 // API Configuration
@@ -976,27 +972,3 @@ export async function compressContext(
 }> {
   return request('POST', `/sessions/${encodeURIComponent(sessionId)}/compress`, options || {});
 }
-
-/**
- * 获取摘要模型配置
- */
-export async function getSummaryConfig(): Promise<{
-  success: boolean;
-  data?: SummaryConfigInfo;
-  error?: string;
-}> {
-  return request('GET', '/config/summary');
-}
-
-/**
- * 更新摘要模型配置
- */
-export async function updateSummaryConfig(
-  config: SummaryConfigInput
-): Promise<{
-  success: boolean;
-  data?: SummaryConfigInfo;
-  error?: string;
-}> {
-  return request('PUT', '/config/summary', config);
-}