feat: 工具层及 mcp 大重构 (#252)

* feat: 第一版大重构

* fix: 修复类型问题

* chore: 更新版本到 1.3.2

* Add brave as alternative WebSearchTool

* fix: 修正顺序

* fix: 修复对穷鬼模式的 auto dream 和 session memory 越过

* feat: 穷鬼模式去除 session-summary

* feat: 创建 builtin-tools 包，搬运所有工具实现

将 src/tools/ 下的全部 60 个工具目录迁移至 packages/builtin-tools/src/tools/，
内部导入路径已更新为 src/ alias 模式。

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

* refactor: 更新 src/ 中所有工具引用至 builtin-tools 包，删除 src/tools/

- src/tools.ts 及 178 个 src/ 文件的 import 路径从 ./tools/ 改为 builtin-tools/tools/
- 删除 src/tools/ 整个目录（已迁移至 packages/builtin-tools/）

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

* chore: 添加 builtin-tools 路径别名至 tsconfig，更新 bun.lock

- tsconfig.json 新增 builtin-tools/* 和 builtin-tools 路径映射
- 新增 packages/builtin-tools/src 至 include

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

* refactor: 为 builtin-tools、mcp-client、agent-tools 添加 @claude-code-best 作用域前缀

所有包名及 import 路径统一添加 @claude-code-best/ 前缀：
- builtin-tools → @claude-code-best/builtin-tools
- mcp-client → @claude-code-best/mcp-client
- agent-tools → @claude-code-best/agent-tools

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

* fix: 修复 node 环境没有 bun 的问题

---------

Co-authored-by: Eric-Guo <eric.guocz@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/mcp-client/src/index.ts

@@ -0,0 +1,124 @@
+// mcp-client — MCP protocol client
+// Strict protocol layer: connection, transport, tool discovery, execution
+
+// Types & schemas
+export {
+  ConfigScope,
+  TransportType,
+  McpStdioServerConfigSchema,
+  McpSSEServerConfigSchema,
+  McpHTTPServerConfigSchema,
+  McpWebSocketServerConfigSchema,
+  McpSdkServerConfigSchema,
+  McpClaudeAIProxyServerConfigSchema,
+  McpServerConfigSchema,
+  McpJsonConfigSchema,
+} from './types.js'
+
+export type {
+  ConfigScope as ConfigScopeType,
+  Transport,
+  McpStdioServerConfig,
+  McpSSEServerConfig,
+  McpSSEIDEServerConfig,
+  McpWebSocketIDEServerConfig,
+  McpHTTPServerConfig,
+  McpWebSocketServerConfig,
+  McpSdkServerConfig,
+  McpClaudeAIProxyServerConfig,
+  McpServerConfig,
+  ScopedMcpServerConfig,
+  McpJsonConfig,
+  MCPServerConnection,
+  ConnectedMCPServer,
+  FailedMCPServer,
+  NeedsAuthMCPServer,
+  PendingMCPServer,
+  DisabledMCPServer,
+  ServerResource,
+  SerializedTool,
+  SerializedClient,
+  MCPCliState,
+} from './types.js'
+
+// Errors
+export {
+  McpError,
+  McpConnectionError,
+  McpAuthError,
+  McpTimeoutError,
+  McpToolCallError,
+  McpSessionExpiredError,
+} from './errors.js'
+
+// Interfaces (host dependency injection)
+export type {
+  Logger,
+  AnalyticsSink,
+  FeatureGate,
+  AuthProvider,
+  ProxyConfig,
+  ContentStorage,
+  ImageProcessor,
+  HttpConfig,
+  SubprocessEnvProvider,
+  McpClientDependencies,
+} from './interfaces.js'
+
+// Transport
+export { createLinkedTransportPair } from './transport/InProcessTransport.js'
+
+// String utilities
+export {
+  buildMcpToolName,
+  normalizeNameForMCP,
+  mcpInfoFromString,
+  getMcpPrefix,
+  getToolNameForPermissionCheck,
+  getMcpDisplayName,
+  extractMcpToolDisplayName,
+} from './strings.js'
+
+// Cache
+export { memoizeWithLRU } from './cache.js'
+
+// Sanitization
+export { recursivelySanitizeUnicode } from './sanitization.js'
+
+// Connection utilities
+export {
+  DEFAULT_CONNECTION_TIMEOUT_MS,
+  MAX_MCP_DESCRIPTION_LENGTH,
+  MAX_ERRORS_BEFORE_RECONNECT,
+  createMcpClient,
+  withConnectionTimeout,
+  captureStderr,
+  isTerminalConnectionError,
+  isMcpSessionExpiredError,
+  installConnectionMonitor,
+  terminateWithSignalEscalation,
+  createCleanup,
+  buildConnectedServer,
+} from './connection.js'
+export type {
+  CreateClientOptions,
+  ConnectionMonitorOptions,
+  CleanupOptions,
+  BuildConnectedServerOptions,
+} from './connection.js'
+
+// Tool discovery
+export {
+  MCP_FETCH_CACHE_SIZE,
+  discoverTools,
+  createCachedToolDiscovery,
+} from './discovery.js'
+export type { DiscoveryOptions } from './discovery.js'
+
+// Tool execution
+export { callMcpTool } from './execution.js'
+export type { CallToolOptions, CallToolResult } from './execution.js'
+
+// Manager (main API)
+export { createMcpManager } from './manager.js'
+export type { McpManager } from './manager.js'