Türkçe çeviri özelliği eklendi (GLM 4.6 ile çeviri yapılıyor)

server/index.js

@@ -9,7 +9,12 @@ import { promises as fs } from 'fs';
 import { v4 as uuidV4 } from 'uuid';
 import Epub from 'epub-gen';
 
-const requiredEnv = ['SUPABASE_URL', 'SUPABASE_SERVICE_ROLE_KEY', 'JWT_SECRET'];
+const requiredEnv = [
+  'SUPABASE_URL',
+  'SUPABASE_SERVICE_ROLE_KEY',
+  'JWT_SECRET',
+  'ZAI_GLM_API_KEY',
+];
 requiredEnv.forEach((key) => {
   if (!process.env[key]) {
     console.error(`Missing required environment variable: ${key}`);
@@ -25,6 +30,7 @@ const allowedOrigins = ORIGIN.split(',').map((origin) => origin.trim());
 const USERS_TABLE = process.env.SUPABASE_USERS_TABLE || 'users';
 const JWT_SECRET = process.env.JWT_SECRET;
 import { supabase } from './src/services/supabaseClient.js';
+import { translateWithGlm } from './src/services/glmClient.js';
 
 app.use(
   cors({
@@ -248,6 +254,21 @@ authRouter.post('/forgot-password', async (req, res) => {
 
 app.use('/auth', authRouter);
 
+app.post('/translate', async (req, res) => {
+  const { text } = req.body || {};
+  if (!text || !text.trim()) {
+    return res.status(400).json({ message: 'Çevrilecek metin bulunamadı.' });
+  }
+
+  try {
+    const translated = await translateWithGlm(text);
+    return res.json({ text: translated });
+  } catch (error) {
+    console.error('GLM çeviri hatası:', error);
+    return res.status(500).json({ message: error.message || 'Çeviri tamamlanamadı.' });
+  }
+});
+
 app.post('/generate-epub', async (req, res) => {
   const { text, meta, cover } = req.body || {};
   if (!text || !text.trim()) {