初始化專案：租屋契約 PDF 產生器

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

server.js

@@ -0,0 +1,60 @@
+const express = require('express');
+const path = require('node:path');
+const {
+  createContractPdf,
+  listTemplates,
+} = require('./src/contractService');
+
+const app = express();
+const port = Number(process.env.PORT || 3005);
+
+app.use(express.json({ limit: '1mb' }));
+app.use(express.static(path.join(__dirname, 'public')));
+
+app.get('/api/health', (_req, res) => {
+  res.json({ ok: true });
+});
+
+app.get('/api/templates', async (_req, res, next) => {
+  try {
+    res.json({ templates: await listTemplates() });
+  } catch (error) {
+    next(error);
+  }
+});
+
+app.post('/api/contracts/pdf', async (req, res) => {
+  try {
+    const result = await createContractPdf({
+      template: req.body.template,
+      monthlyRent: req.body.monthlyRent,
+      paymentDay: req.body.paymentDay,
+      deposit: req.body.deposit,
+    });
+
+    res.setHeader('Content-Type', 'application/pdf');
+    res.setHeader(
+      'Content-Disposition',
+      `attachment; filename="rental-contract.pdf"; filename*=UTF-8''${encodeURIComponent(result.fileName)}`,
+    );
+    res.setHeader('Cache-Control', 'no-store');
+    res.send(result.buffer);
+  } catch (error) {
+    console.error(error);
+    const status = error.exposeToClient ? 400 : 500;
+    res.status(status).json({
+      error: error.exposeToClient
+        ? error.message
+        : 'PDF 產生失敗，請確認 LibreOffice 已安裝且範本格式正確。',
+    });
+  }
+});
+
+app.use((error, _req, res, _next) => {
+  console.error(error);
+  res.status(500).json({ error: '伺服器發生錯誤。' });
+});
+
+app.listen(port, () => {
+  console.log(`Rental contract PDF app is running at http://localhost:${port}`);
+});