fix: Update type hints to use newer Python syntax

- Replace Dict, List, Optional with dict, list,  < /dev/null |  None syntax
- Fix abstract method implementation in message.py
- Improve type annotations and function return types
- Remove unreachable code in get_current_task_tool.py
- Refactor HTML elements to use style attributes

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/do_tool/tool_can_use/get_memory.py

@@ -25,7 +25,6 @@ class GetMemoryTool(BaseTool):
 
         Args:
             function_args: 工具参数
-            message_txt: 原始消息文本
 
         Returns:
             Dict: 工具执行结果