feat(intent): 歧义任务走 LLM 路由，并在选中 agent 时离开直聊会话

对比/清单/行程等口吻按人群场景交给分类器；本机 .env 可覆盖 admin-db 的 router 开关。
顺带在 MindSpace MCP token 过期时轮换 Goose 会话，避免旧会话空 Finish。

server/portal-gateway-services-bootstrap.mjs

@@ -2,6 +2,7 @@ import crypto from 'node:crypto';
 import fs from 'node:fs';
 import path from 'node:path';
 import { createAgentRunGateway } from '../agent-run-gateway.mjs';
+import { resolveDirectEscalationContextPolicy } from '../chat-task-intent-config.mjs';
 import { releaseMaterializedPageDeliveryContracts } from '../mindspace-delivery-contract.mjs';
 import { resolvePublishDir } from '../user-publish.mjs';
 import { createGoalRunService } from '../goal-run-service.mjs';
@@ -256,6 +257,7 @@ export function bootstrapPortalGatewayServices({
     llmProviderService,
     systemDisclosurePolicyService,
     chatIntentRouter,
+    directEscalationContextPolicy: resolveDirectEscalationContextPolicy(env),
     sessionSnapshotService,
     conversationMemoryService,
     goalRunService,