修改index.ts错误

backend/src/index.ts.backup

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+import dotenv from 'dotenv';
+dotenv.config();
+
+import express from 'express';
+import cors from 'cors';
+import authRouter from './routes/auth';
+import performanceRouter from './routes/performance';
+import statisticsRouter from './routes/statistics';
+import configRouter from './routes/config';
+import employeeRouter from './routes/employee';
+
+const app = express();
+const PORT = process.env.PORT || 3001;
+
+app.use(cors());
+app.use(express.json());
+
+app.get('/health', (_req, res) => {
+  res.json({ status: 'ok', timestamp: new Date().toISOString() });
+});
+
+app.use('/api/user', authRouter);
+app.use('/api/performance', performanceRouter);
+app.use('/api/statistics', statisticsRouter);
+app.use('/api/config', configRouter);
+app.use('/api/employee', employeeRouter);
+
+app.listen(PORT, () => {
+  console.log(`Server running on port ${PORT}`);
+});
+
+export default app;

backend/src/tmpclaude-46a5-cwd

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+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend/src

backend/src/tmpclaude-b0af-cwd

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+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend/src

backend/src/tmpclaude-d3fd-cwd

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+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend/src

backend/tmpclaude-02c4-cwd

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+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend

backend/tmpclaude-0599-cwd

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+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend

backend/tmpclaude-694c-cwd

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+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend

backend/tmpclaude-7448-cwd

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+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend

backend/tmpclaude-9f46-cwd

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+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend

backend/tmpclaude-a119-cwd

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+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend

backend/tmpclaude-e6a4-cwd

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+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend