refactor(模型关系): 重构模型关联关系定义位置，从模型文件移至路由文件

backend/routes/background.js

@@ -3,13 +3,11 @@ const path = require('path');
 const fs = require('fs');
 const router = express.Router();
 
-// 确保上传目录存在
 const UPLOAD_DIR = path.join(__dirname, '../uploads');
 if (!fs.existsSync(UPLOAD_DIR)) {
   fs.mkdirSync(UPLOAD_DIR, { recursive: true });
 }
 
-// 确保背景设置文件存在
 const SETTINGS_FILE = path.join(__dirname, '../backgroundSettings.json');
 if (!fs.existsSync(SETTINGS_FILE)) {
   fs.writeFileSync(SETTINGS_FILE, JSON.stringify({
@@ -19,7 +17,33 @@ if (!fs.existsSync(SETTINGS_FILE)) {
   }, null, 2));
 }
 
-// 上传图片接口
+router.get('/', (req, res) => {
+  try {
+    const settings = JSON.parse(fs.readFileSync(SETTINGS_FILE, 'utf8'));
+    res.json({
+      success: true,
+      data: settings
+    });
+  } catch (error) {
+    console.error('读取背景设置失败:', error);
+    res.status(500).json({ error: '读取背景设置失败' });
+  }
+});
+
+router.put('/', (req, res) => {
+  try {
+    const settings = req.body;
+    fs.writeFileSync(SETTINGS_FILE, JSON.stringify(settings, null, 2));
+    res.json({
+      success: true,
+      data: settings
+    });
+  } catch (error) {
+    console.error('保存背景设置失败:', error);
+    res.status(500).json({ error: '保存背景设置失败' });
+  }
+});
+
 router.post('/upload', (req, res) => {
   try {
     if (!req.files || !req.files.file) {
@@ -30,14 +54,12 @@ router.post('/upload', (req, res) => {
     const fileName = `${Date.now()}_${file.name}`;
     const filePath = path.join(UPLOAD_DIR, fileName);
 
-    // 保存文件到服务器
     file.mv(filePath, (err) => {
       if (err) {
         console.error('文件保存失败:', err);
         return res.status(500).json({ error: '文件保存失败' });
       }
 
-      // 返回文件路径
       const fileUrl = `/uploads/${fileName}`;
       res.json({ path: fileUrl });
     });
@@ -47,7 +69,6 @@ router.post('/upload', (req, res) => {
   }
 });
 
-// 获取背景设置
 router.get('/settings', (req, res) => {
   try {
     const settings = JSON.parse(fs.readFileSync(SETTINGS_FILE, 'utf8'));
@@ -58,7 +79,6 @@ router.get('/settings', (req, res) => {
   }
 });
 
-// 保存背景设置
 router.post('/settings', (req, res) => {
   try {
     const settings = req.body;