auto-classify 1

Auto-classify DeepSeek Harness sessions via Jev decision models or Agent tools, displayed as title emoji prefixes (wip 🚧, review 👀, done ✅). dsh-session-prefix：基于 Jev 决策模型或 Agent 工具为会话自动分类，并将任务阶段直观展示为标题前缀 Emoji。