perf: 性能优化与代码质量改进

- 简化ToastProvider组件，移除未使用导入
- 简化Stats页面代码
- 添加React ESLint配置
- 添加数据库索引和API参数验证
- 清理重复文件server.js.backup
- 移除前端未使用的UI代码和复杂样式

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/lib/swr-config.js

@@ -1,5 +1,3 @@
-import { getRecords, getStats, getCategories, getRecurringBills } from './api';
-
 // 全局 SWR 配置
 export const swrConfig = {
   refreshInterval: 0, // 默认不自动刷新
@@ -11,11 +9,3 @@ export const swrConfig = {
     console.error('SWR Error:', error);
   },
 };
-
-// 数据获取器映射
-export const fetchers = {
-  records: (month, type) => getRecords(month, type),
-  stats: (month) => getStats(month),
-  categories: () => getCategories(),
-  recurring: () => getRecurringBills(),
-};

frontend/lib/utils.js

@@ -7,6 +7,13 @@ export const formatMonth = (date) =>
 
 export const formatMoney = (num) => (num || 0).toFixed(2);
 
+// Format date as 'YYYY-MM-DD'
+export const formatDate = (date) =>
+  `${date.getFullYear()}-${String(date.getMonth() + 1).padStart(2, '0')}-${String(date.getDate()).padStart(2, '0')}`;
+
+// Get current time string 'HH:MM'
+export const getCurrentTimeStr = () => new Date().toTimeString().slice(0, 5);
+
 // Parse date-time string 'YYYY-MM-DD HH:MM' into date and time parts
 export const parseDateTime = (dateTimeStr) => {
   if (!dateTimeStr) return { datePart: '', timePart: '00:00' };

frontend/pages/index.js

@@ -7,7 +7,7 @@ import RecordModal from '../components/RecordModal';
 import { useToast } from '../components/ToastProvider';
 import { useConfirm } from '../components/ConfirmProvider';
 import { useCategories } from '../hooks/useCategories';
-import { getMonthStr, formatMoney, formatMonth, parseDateTime, getDatePart } from '../lib/utils';
+import { getMonthStr, formatMoney, formatMonth, parseDateTime, getDatePart, formatDate, getCurrentTimeStr } from '../lib/utils';
 
 export default function Home() {
   const router = useRouter();
@@ -31,12 +31,13 @@ export default function Home() {
       showToast('分类加载失败', { tone: 'error' });
     }
   }, [categoriesError]);
+
   const [formData, setFormData] = useState({
     type: 'expense',
     amount: '',
     category: '',
-    date: new Date().toISOString().split('T')[0],
+    date: formatDate(new Date()),
-    time: new Date().toTimeString().slice(0, 5),
+    time: getCurrentTimeStr(),
     note: '',
   });
 
@@ -53,8 +54,8 @@ export default function Home() {
     type: 'expense',
     amount: '',
     category: '',
-    date: new Date().toISOString().split('T')[0],
+    date: formatDate(new Date()),
-    time: new Date().toTimeString().slice(0, 5),
+    time: getCurrentTimeStr(),
     note: '',
   });
 
@@ -206,12 +207,16 @@ export default function Home() {
     [groupedRecords]
   );
 
-  const getDayExpense = (date) => {
+  const dayExpenses = useMemo(() => {
-    const dayRecords = groupedRecords[date] || [];
+    const expenses = {};
-    return dayRecords
+    for (const date of Object.keys(groupedRecords)) {
-      .filter((record) => record.type === 'expense')
+      const dayRecords = groupedRecords[date] || [];
-      .reduce((sum, record) => sum + record.amount, 0);
+      expenses[date] = dayRecords
-  };
+        .filter((record) => record.type === 'expense')
+        .reduce((sum, record) => sum + record.amount, 0);
+    }
+    return expenses;
+  }, [groupedRecords]);
 
   const homeHeaderContent = (
     <div className="header-center-container">
@@ -297,7 +302,7 @@ export default function Home() {
               <div key={date} className="date-group">
                 <div className="date-label">
                   <span>{new Date(date).toLocaleDateString('zh-CN', { month: 'short', day: 'numeric', weekday: 'short' })}</span>
-                  <span className="day-expense">支出 {formatMoney(getDayExpense(date))}</span>
+                  <span className="day-expense">支出 {formatMoney(dayExpenses[date] || 0)}</span>
                 </div>
                 {groupedRecords[date].map((record) => {
                   const icon = categoryIconMap[`${record.type}:${record.category}`] || '📝';

frontend/pages/search.js

@@ -49,7 +49,7 @@ export default function Search() {
     if (router.isReady && router.query.q) {
       const q = decodeURIComponent(router.query.q);
       // Skip if already have results for this keyword (prevents double API call)
-      if (keyword === q && results.length > 0) return;
+      if (keyword === q) return;
       setKeyword(q);
       // 自动搜索
       const doSearch = async () => {
@@ -66,7 +66,7 @@ export default function Search() {
       };
       doSearch();
     }
-  }, [router.isReady, router.query.q, keyword, results]);
+  }, [router.isReady, router.query.q, keyword]);
 
   const handleSearch = async (e) => {
     e.preventDefault();

frontend/pages/stats.js

@@ -44,13 +44,9 @@ export default function Stats() {
       router.push('/login');
       return;
     }
-    loadTrendData();
+    // 并行加载两个数据集
-  }, [router, period, currentMonth]);
+    Promise.all([loadTrendData(), loadCategoryData()]);
-
+  }, [router, period, currentMonth, categoryType]);
-  useEffect(() => {
-    if (!isLoggedIn()) return;
-    loadCategoryData();
-  }, [router, currentMonth, categoryType]);
 
   const loadTrendData = async () => {
     setTrendLoading(true);
@@ -75,9 +71,20 @@ export default function Stats() {
     }
   };
 
+  useEffect(() => {
+    return () => {
+      // 组件卸载时清理 Chart.js 实例
+      if (trendChartInstance.current) {
+        trendChartInstance.current.destroy();
+        trendChartInstance.current = null;
+      }
+    };
+  }, []);
+
   useEffect(() => {
     if (trendChartInstance.current) {
       trendChartInstance.current.destroy();
+      trendChartInstance.current = null;
     }
     if (trendChartRef.current && trendData.length > 0) {
       const ctx = trendChartRef.current.getContext('2d');

package-lock.json

@@ -9,7 +9,7 @@
       "version": "1.1.0",
       "dependencies": {
         "bcryptjs": "^2.4.3",
-        "better-sqlite3": "^9.2.2",
+        "better-sqlite3": "^9.6.0",
         "cors": "^2.8.5",
         "dotenv": "^16.3.1",
         "express": "^4.18.2",

package.json

@@ -16,7 +16,7 @@
   },
   "dependencies": {
     "bcryptjs": "^2.4.3",
-    "better-sqlite3": "^9.2.2",
+    "better-sqlite3": "^9.6.0",
     "cors": "^2.8.5",
     "dotenv": "^16.3.1",
     "express": "^4.18.2",

server.js

@@ -16,8 +16,7 @@ app.use(cors({
 }));
 app.use(express.json());
 app.use(express.static(path.join(__dirname, 'public')));
-app.use(express.static(path.join(__dirname, 'frontend/.next')));
+app.use(express.static(path.join(__dirname, 'frontend/.next/static')));
-app.use(express.static(path.join(__dirname, 'frontend/.next/server/pages')));
 
 // 数据库初始化
 const db = new Database('accountbook.db');

server.js.backup

@@ -1,824 +0,0 @@
-const express = require('express');
-const Database = require('better-sqlite3');
-const jwt = require('jsonwebtoken');
-const bcrypt = require('bcryptjs');
-const cors = require('cors');
-const path = require('path');
-
-const app = express();
-const PORT = 3501;
-const JWT_SECRET = process.env.JWT_SECRET || 'accountbook_secret_key_2024';
-
-// 中间件
-app.use(cors({
-  origin: ['http://localhost:3500', 'http://127.0.0.1:3500'],
-  credentials: true
-}));
-app.use(express.json());
-app.use(express.static(path.join(__dirname, 'public')));
-app.use(express.static(path.join(__dirname, 'frontend/.next')));
-app.use(express.static(path.join(__dirname, 'frontend/.next/server/pages')));
-
-// 数据库初始化
-const db = new Database('accountbook.db');
-
-// 创建表
-db.exec(`
-  CREATE TABLE IF NOT EXISTS users (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    username TEXT UNIQUE NOT NULL,
-    password TEXT NOT NULL,
-    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
-  );
-
-  CREATE TABLE IF NOT EXISTS records (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    user_id INTEGER NOT NULL,
-    type TEXT NOT NULL CHECK(type IN ('income', 'expense')),
-    amount REAL NOT NULL,
-    category TEXT NOT NULL,
-    date DATETIME NOT NULL,
-    note TEXT,
-    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-    FOREIGN KEY (user_id) REFERENCES users(id)
-  );
-
-  CREATE TABLE IF NOT EXISTS recurring_bills (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    user_id INTEGER NOT NULL,
-    type TEXT NOT NULL CHECK(type IN ('income', 'expense')),
-    amount REAL NOT NULL,
-    category TEXT NOT NULL,
-    day INTEGER NOT NULL,
-    note TEXT,
-    is_active INTEGER DEFAULT 1,
-    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-    FOREIGN KEY (user_id) REFERENCES users(id)
-  );
-
-  CREATE TABLE IF NOT EXISTS categories (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    user_id INTEGER NOT NULL,
-    type TEXT NOT NULL CHECK(type IN ('income', 'expense')),
-    name TEXT NOT NULL,
-    icon TEXT NOT NULL,
-    is_default INTEGER DEFAULT 0,
-    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-    FOREIGN KEY (user_id) REFERENCES users(id)
-  );
-`);
-
-const VALID_RECORD_TYPES = ['income', 'expense'];
-const VALID_STATS_PERIODS = ['week', 'month', 'year'];
-const VALID_STATS_TYPES = ['income', 'expense', 'all'];
-const MONTH_PATTERN = /^\d{4}-\d{2}$/;
-const DATE_TIME_PATTERN = /^\d{4}-\d{2}-\d{2}( \d{2}:\d{2})?$/;
-
-function isNonEmptyString(value) {
-  return typeof value === 'string' && value.trim().length > 0;
-}
-
-function isValidMonth(value) {
-  return typeof value === 'string' && MONTH_PATTERN.test(value);
-}
-
-function isValidDateTime(value) {
-  return typeof value === 'string' && DATE_TIME_PATTERN.test(value);
-}
-
-function normalizeNote(value) {
-  return value === undefined || value === null ? '' : value;
-}
-
-function validateRecordPayload(payload) {
-  if (!payload || typeof payload !== 'object') {
-    return '请求数据格式错误';
-  }
-
-  const { type, amount, category, date, note } = payload;
-
-  if (!VALID_RECORD_TYPES.includes(type)) {
-    return '账目类型错误';
-  }
-
-  if (!Number.isFinite(amount) || amount <= 0) {
-    return '金额需大于0';
-  }
-
-  if (!isNonEmptyString(category)) {
-    return '请填写分类';
-  }
-
-  if (!isValidDateTime(date)) {
-    return '日期格式错误';
-  }
-
-  if (note !== undefined && note !== null && typeof note !== 'string') {
-    return '备注格式错误';
-  }
-
-  return null;
-}
-
-function validateRecurringPayload(payload) {
-  if (!payload || typeof payload !== 'object') {
-    return '请求数据格式错误';
-  }
-
-  const { type, amount, category, day, note, is_active } = payload;
-
-  if (!VALID_RECORD_TYPES.includes(type)) {
-    return '账单类型错误';
-  }
-
-  if (!Number.isFinite(amount) || amount <= 0) {
-    return '金额需大于0';
-  }
-
-  if (!isNonEmptyString(category)) {
-    return '请填写分类';
-  }
-
-  if (!Number.isInteger(day) || day < 1 || day > 28) {
-    return '日期需在1到28之间';
-  }
-
-  if (note !== undefined && note !== null && typeof note !== 'string') {
-    return '备注格式错误';
-  }
-
-  if (is_active !== undefined && ![0, 1, true, false].includes(is_active)) {
-    return '启用状态错误';
-  }
-
-  return null;
-}
-
-function validateCategoryPayload(payload) {
-  if (!payload || typeof payload !== 'object') {
-    return '请求数据格式错误';
-  }
-
-  const { type, name, icon } = payload;
-
-  if (!VALID_RECORD_TYPES.includes(type)) {
-    return '分类类型错误';
-  }
-
-  if (!isNonEmptyString(name)) {
-    return '请填写分类名称';
-  }
-
-  if (!isNonEmptyString(icon)) {
-    return '请选择分类图标';
-  }
-
-  return null;
-}
-
-function validateImportPayload(payload) {
-  if (!payload || typeof payload !== 'object' || Array.isArray(payload)) {
-    return '导入数据格式错误';
-  }
-
-  const { records, recurring, customCategories } = payload;
-
-  if (records !== undefined) {
-    if (!Array.isArray(records)) {
-      return 'records 必须是数组';
-    }
-
-    for (const record of records) {
-      const error = validateRecordPayload(record);
-      if (error) {
-        return `records 数据错误: ${error}`;
-      }
-    }
-  }
-
-  if (recurring !== undefined) {
-    if (!Array.isArray(recurring)) {
-      return 'recurring 必须是数组';
-    }
-
-    for (const bill of recurring) {
-      const error = validateRecurringPayload(bill);
-      if (error) {
-        return `recurring 数据错误: ${error}`;
-      }
-    }
-  }
-
-  if (customCategories !== undefined) {
-    if (!Array.isArray(customCategories)) {
-      return 'customCategories 必须是数组';
-    }
-
-    for (const category of customCategories) {
-      const error = validateCategoryPayload(category);
-      if (error) {
-        return `customCategories 数据错误: ${error}`;
-      }
-    }
-  }
-
-  return null;
-}
-
-// 认证中间件
-const authenticate = (req, res, next) => {
-  const token = req.headers.authorization?.split(' ')[1];
-  if (!token) {
-    return res.status(401).json({ error: '请先登录' });
-  }
-  try {
-    const decoded = jwt.verify(token, JWT_SECRET);
-    req.userId = decoded.userId;
-    next();
-  } catch (err) {
-    return res.status(401).json({ error: '登录已过期' });
-  }
-};
-
-// ============ 认证接口 ============
-
-// 注册
-app.post('/api/auth/register', async (req, res) => {
-  const { username, password } = req.body;
-
-  if (!username || !password) {
-    return res.status(400).json({ error: '请填写用户名和密码' });
-  }
-
-  if (username.length < 3 || username.length > 20) {
-    return res.status(400).json({ error: '用户名需3-20个字符' });
-  }
-
-  if (password.length < 6 || password.length > 20) {
-    return res.status(400).json({ error: '密码需6-20个字符' });
-  }
-
-  try {
-    const hashedPassword = await bcrypt.hash(password, 10);
-    const stmt = db.prepare('INSERT INTO users (username, password) VALUES (?, ?)');
-    const result = stmt.run(username, hashedPassword);
-
-    const token = jwt.sign({ userId: result.lastInsertRowid }, JWT_SECRET, { expiresIn: '7d' });
-    res.json({ token, username });
-  } catch (err) {
-    if (err.code === 'SQLITE_CONSTRAINT_UNIQUE') {
-      return res.status(400).json({ error: '用户名已存在' });
-    }
-    res.status(500).json({ error: '服务器错误' });
-  }
-});
-
-// 登录
-app.post('/api/auth/login', async (req, res) => {
-  const { username, password } = req.body;
-
-  if (!username || !password) {
-    return res.status(400).json({ error: '请填写用户名和密码' });
-  }
-
-  const stmt = db.prepare('SELECT * FROM users WHERE username = ?');
-  const user = stmt.get(username);
-
-  if (!user) {
-    return res.status(400).json({ error: '用户名或密码错误' });
-  }
-
-  const validPassword = await bcrypt.compare(password, user.password);
-  if (!validPassword) {
-    return res.status(400).json({ error: '用户名或密码错误' });
-  }
-
-  const token = jwt.sign({ userId: user.id }, JWT_SECRET, { expiresIn: '7d' });
-  res.json({ token, username: user.username });
-});
-
-// ============ 账目接口 ============
-
-// 获取账目列表
-app.get('/api/records', authenticate, (req, res) => {
-  const { month, type } = req.query;
-
-  let query = 'SELECT * FROM records WHERE user_id = ?';
-  const params = [req.userId];
-
-  if (month) {
-    query += ' AND date LIKE ?';
-    params.push(`${month}%`);
-  }
-
-  if (type && type !== 'all') {
-    query += ' AND type = ?';
-    params.push(type);
-  }
-
-  query += ' ORDER BY date DESC, id DESC';
-
-  const stmt = db.prepare(query);
-  const records = stmt.all(...params);
-
-  res.json(records);
-});
-
-// 新增账目
-app.post('/api/records', authenticate, (req, res) => {
-  const { type, amount, category, date, note } = req.body;
-
-  const validationError = validateRecordPayload(req.body);
-  if (validationError) {
-    return res.status(400).json({ error: validationError });
-  }
-
-  const stmt = db.prepare(`
-    INSERT INTO records (user_id, type, amount, category, date, note)
-    VALUES (?, ?, ?, ?, ?, ?)
-  `);
-
-  const result = stmt.run(req.userId, type, amount, category.trim(), date, normalizeNote(note));
-
-  res.json({ id: result.lastInsertRowid, message: '添加成功' });
-});
-
-// 更新账目
-app.put('/api/records/:id', authenticate, (req, res) => {
-  const { id } = req.params;
-  const { type, amount, category, date, note } = req.body;
-
-  const checkStmt = db.prepare('SELECT * FROM records WHERE id = ? AND user_id = ?');
-  const record = checkStmt.get(id, req.userId);
-
-  if (!record) {
-    return res.status(404).json({ error: '记录不存在' });
-  }
-
-  const validationError = validateRecordPayload(req.body);
-  if (validationError) {
-    return res.status(400).json({ error: validationError });
-  }
-
-  const stmt = db.prepare(`
-    UPDATE records SET type = ?, amount = ?, category = ?, date = ?, note = ?
-    WHERE id = ? AND user_id = ?
-  `);
-
-  stmt.run(type, amount, category.trim(), date, normalizeNote(note), id, req.userId);
-
-  res.json({ message: '更新成功' });
-});
-
-// 删除账目
-app.delete('/api/records/:id', authenticate, (req, res) => {
-  const { id } = req.params;
-
-  const checkStmt = db.prepare('SELECT * FROM records WHERE id = ? AND user_id = ?');
-  const record = checkStmt.get(id, req.userId);
-
-  if (!record) {
-    return res.status(404).json({ error: '记录不存在' });
-  }
-
-  const stmt = db.prepare('DELETE FROM records WHERE id = ? AND user_id = ?');
-  stmt.run(id, req.userId);
-
-  res.json({ message: '删除成功' });
-});
-
-// 批量删除指定分类的记录
-app.delete('/api/records/by-category/:category', authenticate, (req, res) => {
-  const { category } = req.params;
-
-  if (!category || typeof category !== 'string' || !category.trim()) {
-    return res.status(400).json({ error: '分类不能为空' });
-  }
-
-  const stmt = db.prepare('DELETE FROM records WHERE category = ? AND user_id = ?');
-  const result = stmt.run(category.trim(), req.userId);
-
-  res.json({ message: `已删除 ${result.changes} 条记录` });
-});
-
-// 获取月度统计
-app.get('/api/stats', authenticate, (req, res) => {
-  const { month } = req.query;
-
-  if (!month) {
-    return res.status(400).json({ error: '请指定月份' });
-  }
-
-  const stmt = db.prepare(`
-    SELECT
-      SUM(CASE WHEN type = 'income' THEN amount ELSE 0 END) as totalIncome,
-      SUM(CASE WHEN type = 'expense' THEN amount ELSE 0 END) as totalExpense
-    FROM records
-    WHERE user_id = ? AND date LIKE ?
-  `);
-
-  const result = stmt.get(req.userId, `${month}%`);
-
-  res.json({
-    income: result.totalIncome || 0,
-    expense: result.totalExpense || 0,
-    balance: (result.totalIncome || 0) - (result.totalExpense || 0)
-  });
-});
-
-// ============ 搜索接口 ============
-
-// 搜索账目
-app.get('/api/records/search', authenticate, (req, res) => {
-  const { q } = req.query;
-
-  if (!q) {
-    return res.status(400).json({ error: '请输入搜索关键词' });
-  }
-
-  const stmt = db.prepare(`
-    SELECT * FROM records
-    WHERE user_id = ? AND (category LIKE ? OR note LIKE ?)
-    ORDER BY date DESC, id DESC
-    LIMIT 50
-  `);
-
-  const records = stmt.all(req.userId, `%${q}%`, `%${q}%`);
-  res.json(records);
-});
-
-// ============ 统计接口 ============
-
-// 收支趋势统计
-app.get('/api/stats/trend', authenticate, (req, res) => {
-  const { period = 'month', month } = req.query;
-
-  if (!VALID_STATS_PERIODS.includes(period)) {
-    return res.status(400).json({ error: '统计周期错误' });
-  }
-
-  if (month && !isValidMonth(month)) {
-    return res.status(400).json({ error: '月份格式错误' });
-  }
-
-  let dateGroup;
-  if (period === 'year') {
-    dateGroup = "strftime('%Y', date)";
-  } else if (period === 'week') {
-    dateGroup = "strftime('%Y-%W', date)";
-  } else {
-    dateGroup = "strftime('%Y-%m', date)";
-  }
-
-  let query = `
-    SELECT
-      ${dateGroup} as period,
-      SUM(CASE WHEN type = 'income' THEN amount ELSE 0 END) as income,
-      SUM(CASE WHEN type = 'expense' THEN amount ELSE 0 END) as expense
-    FROM records
-    WHERE user_id = ?
-  `;
-  const params = [req.userId];
-
-  if (month) {
-    query += ' AND date LIKE ?';
-    params.push(`${month}%`);
-  }
-
-  query += `
-    GROUP BY ${dateGroup}
-    ORDER BY period DESC
-    LIMIT 12
-  `;
-
-  const stmt = db.prepare(query);
-  const result = stmt.all(...params);
-  res.json(result.reverse());
-});
-
-// 分类统计
-app.get('/api/stats/category', authenticate, (req, res) => {
-  const { month, type = 'all' } = req.query;
-
-  if (!VALID_STATS_TYPES.includes(type)) {
-    return res.status(400).json({ error: '统计类型错误' });
-  }
-
-  if (month && !isValidMonth(month)) {
-    return res.status(400).json({ error: '月份格式错误' });
-  }
-
-  let query = `
-    SELECT
-      category,
-      SUM(amount) as total,
-      type
-    FROM records
-    WHERE user_id = ?
-  `;
-  const params = [req.userId];
-
-  if (month) {
-    query += ' AND date LIKE ?';
-    params.push(`${month}%`);
-  }
-
-  if (type !== 'all') {
-    query += ' AND type = ?';
-    params.push(type);
-  }
-
-  query += `
-    GROUP BY category, type
-    ORDER BY total DESC
-  `;
-
-  const stmt = db.prepare(query);
-  const result = stmt.all(...params);
-  res.json(result);
-});
-
-// ============ 周期性账单接口 ============
-
-// 获取周期性账单
-app.get('/api/recurring', authenticate, (req, res) => {
-  const stmt = db.prepare('SELECT * FROM recurring_bills WHERE user_id = ? ORDER BY day ASC');
-  const bills = stmt.all(req.userId);
-  res.json(bills);
-});
-
-// 新增周期性账单
-app.post('/api/recurring', authenticate, (req, res) => {
-  const { type, amount, category, day, note } = req.body;
-
-  const validationError = validateRecurringPayload(req.body);
-  if (validationError) {
-    return res.status(400).json({ error: validationError });
-  }
-
-  const stmt = db.prepare(`
-    INSERT INTO recurring_bills (user_id, type, amount, category, day, note)
-    VALUES (?, ?, ?, ?, ?, ?)
-  `);
-
-  const result = stmt.run(req.userId, type, amount, category.trim(), day, normalizeNote(note));
-  res.json({ id: result.lastInsertRowid, message: '添加成功' });
-});
-
-// 更新周期性账单
-app.put('/api/recurring/:id', authenticate, (req, res) => {
-  const { id } = req.params;
-  const { type, amount, category, day, note, is_active } = req.body;
-
-  const checkStmt = db.prepare('SELECT * FROM recurring_bills WHERE id = ? AND user_id = ?');
-  const bill = checkStmt.get(id, req.userId);
-
-  if (!bill) {
-    return res.status(404).json({ error: '账单不存在' });
-  }
-
-  const validationError = validateRecurringPayload(req.body);
-  if (validationError) {
-    return res.status(400).json({ error: validationError });
-  }
-
-  const stmt = db.prepare(`
-    UPDATE recurring_bills SET type = ?, amount = ?, category = ?, day = ?, note = ?, is_active = ?
-    WHERE id = ? AND user_id = ?
-  `);
-
-  stmt.run(type, amount, category.trim(), day, normalizeNote(note), is_active !== undefined ? is_active : 1, id, req.userId);
-  res.json({ message: '更新成功' });
-});
-
-// 删除周期性账单
-app.delete('/api/recurring/:id', authenticate, (req, res) => {
-  const { id } = req.params;
-
-  const checkStmt = db.prepare('SELECT * FROM recurring_bills WHERE id = ? AND user_id = ?');
-  const bill = checkStmt.get(id, req.userId);
-
-  if (!bill) {
-    return res.status(404).json({ error: '账单不存在' });
-  }
-
-  const stmt = db.prepare('DELETE FROM recurring_bills WHERE id = ? AND user_id = ?');
-  stmt.run(id, req.userId);
-  res.json({ message: '删除成功' });
-});
-
-// 应用周期性账单
-app.post('/api/recurring/:id/apply', authenticate, (req, res) => {
-  const { id } = req.params;
-
-  const checkStmt = db.prepare('SELECT * FROM recurring_bills WHERE id = ? AND user_id = ? AND is_active = 1');
-  const bill = checkStmt.get(id, req.userId);
-
-  if (!bill) {
-    return res.status(404).json({ error: '账单不存在或已禁用' });
-  }
-
-  // 创建当前日期的账目
-  const today = new Date();
-  const dateStr = today.toISOString().split('T')[0] + ' ' + today.toTimeString().slice(0, 5);
-
-  const insertStmt = db.prepare(`
-    INSERT INTO records (user_id, type, amount, category, date, note)
-    VALUES (?, ?, ?, ?, ?, ?)
-  `);
-
-  insertStmt.run(req.userId, bill.type, bill.amount, bill.category, dateStr, bill.note || '');
-  res.json({ message: '应用成功' });
-});
-
-// ============ 分类接口 ============
-
-// 获取分类列表
-app.get('/api/categories', authenticate, (req, res) => {
-  const stmt = db.prepare('SELECT * FROM categories WHERE user_id = ? ORDER BY type, id');
-  const customCategories = stmt.all(req.userId);
-
-  const defaultCategories = {
-    expense: [
-      { name: '餐饮', icon: '🍜' },
-      { name: '买菜', icon: '🥬' },
-      { name: '交通', icon: '🚗' },
-      { name: '购物', icon: '🛒' },
-      { name: '娱乐', icon: '🎮' },
-      { name: '房租', icon: '🏠' },
-      { name: '房贷', icon: '🏦' },
-      { name: '水电', icon: '💧' },
-      { name: '衣服', icon: '👔' },
-      { name: '通讯', icon: '📱' },
-      { name: '日用品', icon: '🧴' },
-      { name: '美妆', icon: '💄' },
-      { name: '医疗', icon: '🏥' },
-      { name: '养娃', icon: '👶' },
-      { name: '家电', icon: '📺' },
-      { name: '家具', icon: '🛋️' },
-      { name: '装修', icon: '🔨' },
-      { name: '宠物', icon: '🐕' },
-      { name: '其他', icon: '📝' }
-    ],
-    income: [
-      { name: '工资', icon: '💰' },
-      { name: '奖金', icon: '🎁' },
-      { name: '理财', icon: '📈' },
-      { name: '红包', icon: '🧧' },
-      { name: '其他', icon: '📝' }
-    ]
-  };
-
-  // 合并默认分类和自定义分类
-  const categories = {
-    expense: [
-      ...defaultCategories.expense.map(c => ({ ...c, is_default: true })),
-      ...customCategories.filter(c => c.type === 'expense')
-    ],
-    income: [
-      ...defaultCategories.income.map(c => ({ ...c, is_default: true })),
-      ...customCategories.filter(c => c.type === 'income')
-    ]
-  };
-
-  res.json(categories);
-});
-
-// 新增自定义分类
-app.post('/api/categories', authenticate, (req, res) => {
-  const { type, name, icon } = req.body;
-
-  const validationError = validateCategoryPayload(req.body);
-  if (validationError) {
-    return res.status(400).json({ error: validationError });
-  }
-
-  const stmt = db.prepare(`
-    INSERT INTO categories (user_id, type, name, icon, is_default)
-    VALUES (?, ?, ?, ?, 0)
-  `);
-
-  const result = stmt.run(req.userId, type, name.trim(), icon.trim());
-  res.json({ id: result.lastInsertRowid, message: '添加成功' });
-});
-
-// 删除自定义分类
-app.delete('/api/categories/:id', authenticate, (req, res) => {
-  const { id } = req.params;
-
-  const checkStmt = db.prepare('SELECT * FROM categories WHERE id = ? AND user_id = ? AND is_default = 0');
-  const category = checkStmt.get(id, req.userId);
-
-  if (!category) {
-    return res.status(404).json({ error: '分类不存在或无法删除' });
-  }
-
-  const stmt = db.prepare('DELETE FROM categories WHERE id = ? AND user_id = ?');
-  stmt.run(id, req.userId);
-  res.json({ message: '删除成功' });
-});
-
-// ============ 数据导入导出接口 ============
-
-// 导出数据
-app.get('/api/export', authenticate, (req, res) => {
-  const recordsStmt = db.prepare('SELECT * FROM records WHERE user_id = ? ORDER BY date DESC');
-  const records = recordsStmt.all(req.userId);
-
-  const recurringStmt = db.prepare('SELECT * FROM recurring_bills WHERE user_id = ?');
-  const recurring = recurringStmt.all(req.userId);
-
-  const categoriesStmt = db.prepare('SELECT * FROM categories WHERE user_id = ?');
-  const categories = categoriesStmt.all(req.userId);
-
-  res.json({
-    version: '1.0',
-    exportDate: new Date().toISOString(),
-    records,
-    recurring,
-    customCategories: categories
-  });
-});
-
-// 导入数据
-app.post('/api/import', authenticate, (req, res) => {
-  const { records: importRecords, recurring: importRecurring, customCategories: importCategories } = req.body;
-
-  const validationError = validateImportPayload(req.body);
-  if (validationError) {
-    return res.status(400).json({ error: validationError });
-  }
-
-  try {
-    if (importRecords && Array.isArray(importRecords)) {
-      const insertRecord = db.prepare(`
-        INSERT INTO records (user_id, type, amount, category, date, note, created_at)
-        VALUES (?, ?, ?, ?, ?, ?, ?)
-      `);
-
-      const insertMany = db.transaction((records) => {
-        for (const r of records) {
-          insertRecord.run(req.userId, r.type, r.amount, r.category.trim(), r.date, normalizeNote(r.note), r.created_at || new Date().toISOString());
-        }
-      });
-      insertMany(importRecords);
-    }
-
-    if (importRecurring && Array.isArray(importRecurring)) {
-      const insertRecurring = db.prepare(`
-        INSERT INTO recurring_bills (user_id, type, amount, category, day, note, is_active, created_at)
-        VALUES (?, ?, ?, ?, ?, ?, ?, ?)
-      `);
-
-      const insertRecurringMany = db.transaction((bills) => {
-        for (const b of bills) {
-          insertRecurring.run(req.userId, b.type, b.amount, b.category.trim(), b.day, normalizeNote(b.note), b.is_active !== undefined ? b.is_active : 1, b.created_at || new Date().toISOString());
-        }
-      });
-      insertRecurringMany(importRecurring);
-    }
-
-    if (importCategories && Array.isArray(importCategories)) {
-      const insertCategory = db.prepare(`
-        INSERT INTO categories (user_id, type, name, icon, is_default, created_at)
-        VALUES (?, ?, ?, ?, 0, ?)
-      `);
-
-      const insertCategoryMany = db.transaction((cats) => {
-        for (const c of cats) {
-          insertCategory.run(req.userId, c.type, c.name.trim(), c.icon.trim(), c.created_at || new Date().toISOString());
-        }
-      });
-      insertCategoryMany(importCategories);
-    }
-
-    res.json({ message: '导入成功' });
-  } catch (err) {
-    res.status(500).json({ error: '导入失败: ' + err.message });
-  }
-});
-
-// 前端路由 - 优先处理 Next.js 静态文件
-app.get('/_next/static/:path(*)', (req, res) => {
-  const filePath = path.join(__dirname, 'frontend/.next/static', req.params.path);
-  res.sendFile(filePath, (err) => {
-    if (err) res.status(404).send('Not found');
-  });
-});
-
-app.get('*', (req, res) => {
-  // 检查是否是 Next.js 预渲染的页面
-  let pagePath = req.path === '/' ? '/index.html' : req.path + '.html';
-  const nextPagePath = path.join(__dirname, 'frontend/.next/server/pages', pagePath);
-
-  res.sendFile(nextPagePath, (err) => {
-    if (err) {
-      // 如果找不到，返回首页
-      res.sendFile(path.join(__dirname, 'frontend/.next/server/pages/index.html'));
-    }
-  });
-});
-
-app.listen(PORT, '0.0.0.0', () => {
-  console.log(`记账本服务已启动: http://0.0.0.0:${PORT}`);
-});