Add parameters env and prebuild script

.env

@@ -1 +1,4 @@
 REACT_APP_IMAGE_BASE_URL=https://img2.baidu.com
+REACT_APP_ASSISTANT_DISPLAY_NAME_EN=
+REACT_APP_ASSISTANT_DISPLAY_NAME_ZH=
+REACT_APP_LOGO_FILE=

package.json

@@ -53,11 +53,11 @@
     "lint": "eslint src --ext ts",
     "test": "mocha",
     "build": "webpack --config webpack.config.js",
-    "vscode": "webpack --config webpack.config.js && mv dist/* ../dist",
+    "vscode": "node prebuild.js && webpack --config webpack.config.js && mv dist/* ../dist",
     "vscode:watch": "webpack --config webpack.config.js --watch",
     "dev": "webpack serve --config webpack.config.js --open",
     "build:idea": "webpack --config webpack.idea.config.js",
-    "idea": "webpack --config webpack.idea.config.js &&  mv dist/main.js dist/main.html ../src/main/resources/static && echo '🎆done'"
+    "idea": "node prebuild.js && webpack --config webpack.idea.config.js &&  mv dist/main.js dist/main.html ../src/main/resources/static && echo '🎆done'"
   },
   "devDependencies": {
     "@babel/core": "^7.21.8",

prebuild.js

@@ -0,0 +1,23 @@
+require('dotenv').config();
+
+const fs = require('fs');
+const path = require('path');
+
+const logoPath = process.env.REACT_APP_LOGO_FILE;
+if (!logoPath) {
+  console.warn('REACT_APP_LOGO_FILE is not defined in your environment variables');
+  process.exit(0);
+}
+if (!fs.existsSync(logoPath)) {
+    console.warn('Logo file does not exist.');
+    process.exit(0)
+}
+
+const destPath = path.join(__dirname, 'src/views/components/MessageAvatar/avatar_devchat.svg');
+
+try {
+    fs.copyFileSync(logoPath, destPath)
+    fs.chmodSync(destPath, 0o644)
+} catch(e) {
+    console.warn(`Failed to copy logo ${e}`)
+}