docs: 交付文档、维护指引与端到端回归

补齐 README、开发计划、维护交接与 E2E 用例，执行最终验收。

e2e/src/api/mcp.ts

@@ -0,0 +1,18 @@
+import type { ApiClient } from './client'
+
+export interface McpConnector {
+  id: number
+  name: string
+  url: string | null
+  headers: Record<string, string> | null
+}
+
+/** Adds a streamable-HTTP MCP server to the org's connectors. */
+export async function createMcpConnector(api: ApiClient, connector: { name: string; url: string; headers?: Record<string, string> }): Promise<McpConnector> {
+  return api.post<McpConnector>('/mcp-tools', { data: { transport_type: 'http', enabled: true, timeout: 10, ...connector } })
+}
+
+/** Gives an agent the connector's tools. */
+export async function attachMcpConnector(api: ApiClient, connectorId: number, agentId: string): Promise<void> {
+  await api.post('/mcp-tools/agent-association', { data: { mcp_tool_id: connectorId, agent_id: agentId } })
+}