feat: update README.md and solving Python compatibility issues

agent/memory/chunker.py

@@ -4,6 +4,7 @@ Text chunking utilities for memory
 Splits text into chunks with token limits and overlap
 """
 
+from __future__ import annotations
 from typing import List, Tuple
 from dataclasses import dataclass
 

agent/memory/config.py

@@ -4,6 +4,7 @@ Memory configuration module
 Provides global memory configuration with simplified workspace structure
 """
 
+from __future__ import annotations
 import os
 from dataclasses import dataclass, field
 from typing import Optional, List

agent/memory/storage.py

@@ -4,6 +4,7 @@ Storage layer for memory using SQLite + FTS5
 Provides vector and keyword search capabilities
 """
 
+from __future__ import annotations
 import sqlite3
 import json
 import hashlib

agent/prompt/builder.py

@@ -4,6 +4,7 @@ System Prompt Builder - 系统提示词构建器
 实现模块化的系统提示词构建，支持工具、技能、记忆等多个子系统
 """
 
+from __future__ import annotations
 import os
 from typing import List, Dict, Optional, Any
 from dataclasses import dataclass

agent/prompt/workspace.py

@@ -4,6 +4,7 @@ Workspace Management - 工作空间管理模块
 负责初始化工作空间、创建模板文件、加载上下文文件
 """
 
+from __future__ import annotations
 import os
 import json
 from typing import List, Optional, Dict

agent/protocol/result.py

@@ -1,3 +1,4 @@
+from __future__ import annotations
 import time
 import uuid
 from dataclasses import dataclass, field

agent/protocol/task.py

@@ -1,3 +1,4 @@
+from __future__ import annotations
 import time
 import uuid
 from dataclasses import dataclass, field