add:添加保存scheme为对象的功能

backend/index.js

@@ -0,0 +1,40 @@
+import express from 'express';
+import bodyParser from 'body-parser';
+import cors from 'cors';
+import fs from 'fs';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const app = express();
+const PORT = 3000;
+
+// 获取当前文件的目录路径
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+const FILE_PATH = path.join(__dirname, '../src/modules/previewScheme.json');
+
+app.use(cors());
+app.use(bodyParser.json());
+
+app.post('/save', (req, res) => {
+    const data = req.body;
+    try {
+        fs.writeFileSync(FILE_PATH, JSON.stringify(data, null, 2));
+        res.status(200).send('Data saved successfully');
+    } catch (error) {
+        res.status(500).send('Error saving data');
+    }
+});
+
+app.get('/load', (req, res) => {
+    try {
+        const data = fs.readFileSync(FILE_PATH, 'utf-8');
+        res.status(200).json(JSON.parse(data));
+    } catch (error) {
+        res.status(500).send('Error loading data');
+    }
+});
+
+app.listen(PORT, () => {
+    console.log(`Server is running on port ${PORT}`);
+});

backend/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "backend",
+  "version": "1.0.0",
+  "type": "module",
+  "main": "dist/index.js",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "dependencies": {
+    "body-parser": "^1.20.3",
+    "cors": "^2.8.5",
+    "express": "^4.21.1"
+  },
+  "volta": {
+    "node": "22.11.0"
+  },
+  "devDependencies": {
+    "@types/cors": "^2.8.17"
+  }
+}