tier 2

DeepSeek 六档推理等级（low/medium/high/xhigh/max/ultra）：接管 deepseek-account 适配器，把右下角菜单从四档扩到六档；max/ultra 两档额外注入强化流程与 Agent Team 行为块。

Automatic tier-based model routing for DeepSeek Harness: a virtual `smart` model classifies each request by difficulty (hard / normal / easy) and by vision need, then delegates it to the models you already configured. 三级难度 + 视觉自动路由，虚拟 smart 模型零配置接入。