修复 @param 在类扩展时作用域污染的问题，完善interface

.vscode/extensions.json

@@ -0,0 +1,8 @@
+{
+    "recommendations": [
+        "dbaeumer.vscode-eslint",
+        "gruntfuggly.todo-tree",
+        "ronnidc.nunjucks",
+        "sysoev.language-stylus"
+    ]
+}