chore: 更新静态资源文件并清理构建输出目录

删除旧的构建输出文件，包括图片资源和编译生成的JavaScript文件
添加新的图标资源文件到assets/img目录
更新package.json中的开发脚本配置

.output/server/node_modules/asynckit/lib/defer.js

@@ -1,26 +0,0 @@
-module.exports = defer;
-
-/**
- * Runs provided function on next iteration of the event loop
- *
- * @param {function} fn - function to run
- */
-function defer(fn)
-{
-  var nextTick = typeof setImmediate == 'function'
-    ? setImmediate
-    : (
-      typeof process == 'object' && typeof process.nextTick == 'function'
-      ? process.nextTick
-      : null
-    );
-
-  if (nextTick)
-  {
-    nextTick(fn);
-  }
-  else
-  {
-    setTimeout(fn, 0);
-  }
-}