Add study notes for 2025-08-18

Author: AutoBot42

Tunnelai.md

@@ -15,6 +15,10 @@ timezone: UTC+8
 ## Notes
 
 <!-- Content_START -->
+# 2025-08-18
+
+完成“链上留言板” 智能合约开发
+
 # 2025-08-17
 
 学习