feat: 初始化日记系统仓库

- AGENTS.md: 核心工作区指南和记忆系统规范
- SOUL.md: 人格和行为规范
- USER.md: 用户信息记录
- TOOLS.md: 本地工具配置笔记
- IDENTITY.md: 助手身份定义
- HEARTBEAT.md: 心跳检查模板
- .gitignore: 排除运行时文件和敏感数据

日记系统包含：
- 长期记忆 (MEMORY.md)
- 每日日志 (memory/YYYY-MM-DD.md)
- 心跳主动检查机制
- 会话连续性管理

USER.md

@@ -0,0 +1,17 @@
+# USER.md - About Your Human
+
+_Learn about the person you're helping. Update this as you go._
+
+- **Name:** Moja
+- **What to call them:** Moja
+- **Pronouns:** _(optional)_
+- **Timezone:** _(need to ask)_
+- **Notes:**
+
+## Context
+
+_(What do they care about? What projects are they working on? What annoys them? What makes them laugh? Build this over time.)_
+
+---
+
+The more you know, the better you can help. But remember — you're learning about a person, not building a dossier. Respect the difference.