diff --git a/backend/src/index.ts.backup b/backend/src/index.ts.backup
new file mode 100644
index 0000000..399b1d3
--- /dev/null
+++ b/backend/src/index.ts.backup
@@ -0,0 +1,32 @@
+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;
diff --git a/backend/src/tmpclaude-46a5-cwd b/backend/src/tmpclaude-46a5-cwd
new file mode 100644
index 0000000..7be02dc
--- /dev/null
+++ b/backend/src/tmpclaude-46a5-cwd
@@ -0,0 +1 @@
+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend/src
diff --git a/backend/src/tmpclaude-b0af-cwd b/backend/src/tmpclaude-b0af-cwd
new file mode 100644
index 0000000..7be02dc
--- /dev/null
+++ b/backend/src/tmpclaude-b0af-cwd
@@ -0,0 +1 @@
+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend/src
diff --git a/backend/src/tmpclaude-d3fd-cwd b/backend/src/tmpclaude-d3fd-cwd
new file mode 100644
index 0000000..7be02dc
--- /dev/null
+++ b/backend/src/tmpclaude-d3fd-cwd
@@ -0,0 +1 @@
+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend/src
diff --git a/backend/tmpclaude-02c4-cwd b/backend/tmpclaude-02c4-cwd
new file mode 100644
index 0000000..c189ea7
--- /dev/null
+++ b/backend/tmpclaude-02c4-cwd
@@ -0,0 +1 @@
+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend
diff --git a/backend/tmpclaude-0599-cwd b/backend/tmpclaude-0599-cwd
new file mode 100644
index 0000000..c189ea7
--- /dev/null
+++ b/backend/tmpclaude-0599-cwd
@@ -0,0 +1 @@
+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend
diff --git a/backend/tmpclaude-694c-cwd b/backend/tmpclaude-694c-cwd
new file mode 100644
index 0000000..c189ea7
--- /dev/null
+++ b/backend/tmpclaude-694c-cwd
@@ -0,0 +1 @@
+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend
diff --git a/backend/tmpclaude-7448-cwd b/backend/tmpclaude-7448-cwd
new file mode 100644
index 0000000..c189ea7
--- /dev/null
+++ b/backend/tmpclaude-7448-cwd
@@ -0,0 +1 @@
+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend
diff --git a/backend/tmpclaude-9f46-cwd b/backend/tmpclaude-9f46-cwd
new file mode 100644
index 0000000..c189ea7
--- /dev/null
+++ b/backend/tmpclaude-9f46-cwd
@@ -0,0 +1 @@
+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend
diff --git a/backend/tmpclaude-a119-cwd b/backend/tmpclaude-a119-cwd
new file mode 100644
index 0000000..c189ea7
--- /dev/null
+++ b/backend/tmpclaude-a119-cwd
@@ -0,0 +1 @@
+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend
diff --git a/backend/tmpclaude-e6a4-cwd b/backend/tmpclaude-e6a4-cwd
new file mode 100644
index 0000000..c189ea7
--- /dev/null
+++ b/backend/tmpclaude-e6a4-cwd
@@ -0,0 +1 @@
+/c/Users/99095/Desktop/优一科技/performance-evaluation-system/backend