fix: 修复打包后图片资源无法加载的问题

- 配置 webpack copy-webpack-plugin 将 src/assets 复制到 dist/assets
- 更新所有图片引用路径从 src/assets 改为 dist/assets
- 修改 localResourceRoots 配置以允许访问 dist/assets

webpack.config.js

@@ -3,6 +3,7 @@
 'use strict';
 
 const path = require('path');
+const CopyWebpackPlugin = require('copy-webpack-plugin');
 
 //@ts-check
 /** @typedef {import('webpack').Configuration} WebpackConfig **/
@@ -45,5 +46,12 @@ const extensionConfig = {
   infrastructureLogging: {
     level: "log", // enables logging required for problem matchers
   },
+  plugins: [
+    new CopyWebpackPlugin({
+      patterns: [
+        { from: 'src/assets', to: 'assets' }
+      ]
+    })
+  ]
 };
 module.exports = [ extensionConfig ];