feat: 项目更名为张三，笔记规范升级

- 项目名：nerd-Brain/呆脑子 -> 张三
- 笔记规范：每次记录强制带时间戳 [YYYY-MM-DD HH:MM]
- 标签更新：#memory/zhang-san
- 同步 anchor_writer.py 时间戳功能

anchor_writer.py

@@ -48,9 +48,10 @@ def call_model(content):
     prompt = f"""Analyze this text. Output ONLY a valid JSON object. No markdown, no explanation. 
 Keys: 
 - summary (max 50 words, append URLs if external resources/GitHub mentioned)
-- tags (list of EXACTLY 2 strings, format '#Category/ProjectName', e.g., ['#memory/nerd-brain', '#llm/local-deploy'])
+- tags (list of EXACTLY 2 strings, format '#Category/ProjectName', e.g., ['#memory/zhang-san', '#llm/local-deploy'])
 - valence (-1.0 to 1.0)
 - arousal (0.0 to 1.0)
+- timestamp (current time in YYYY-MM-DD HH:MM format)
 Text: {content}"""
     
     data = json.dumps({
@@ -97,6 +98,7 @@ def save_memory(content):
     filepath = os.path.join(VAULT_DIR, filename)
     
     # Construct Markdown with YAML frontmatter
+    ts = meta.get('timestamp', now.strftime('%Y-%m-%d %H:%M'))
     md_content = f"""---
 title: {meta.get('summary', 'Untitled')[:30]}
 date: {now.strftime('%Y-%m-%d %H:%M')}
@@ -109,6 +111,8 @@ status: active
 
 # {meta.get('summary', 'Untitled')}
 
+> 📅 {ts}
+
 {content}
 """
     with open(filepath, 'w', encoding='utf-8') as f: