update logging messages

frontend/src/App.jsx

@@ -157,7 +157,7 @@ function App() {
 
     try {
       const currentElements = excalidrawAPI.getSceneElements()
-      console.log('当前元素:', currentElements);
+      console.log('Current elements:', currentElements);
 
       switch (data.type) {
         case 'initial_elements':

src/server.js

@@ -77,7 +77,7 @@ wss.on('connection', (ws) => {
 
 // Schema validation
 const CreateElementSchema = z.object({
-  id: z.string().optional(), // 允许传入ID，用于MCP同步
+  id: z.string().optional(), // Allow passing ID for MCP sync
   type: z.enum(Object.values(EXCALIDRAW_ELEMENT_TYPES)),
   x: z.number(),
   y: z.number(),
@@ -142,7 +142,7 @@ app.post('/api/elements', (req, res) => {
     const params = CreateElementSchema.parse(req.body);
     logger.info('Creating element via API', { type: params.type });
 
-    // 优先使用传入的ID（用于MCP同步），否则生成新ID
+    // Prioritize passed ID (for MCP sync), otherwise generate new ID
     const id = params.id || generateId();
     const element = {
       id,
@@ -357,7 +357,7 @@ app.post('/api/elements/batch', (req, res) => {
   }
 });
 
-// Sync elements from frontend (覆盖式同步)
+// Sync elements from frontend (overwrite sync)
 app.post('/api/elements/sync', (req, res) => {
   try {
     const { elements: frontendElements, timestamp } = req.body;
@@ -367,7 +367,7 @@ app.post('/api/elements/sync', (req, res) => {
       elementCount: frontendElements.length
     });
     
-    // 验证输入数据
+    // Validate input data
     if (!Array.isArray(frontendElements)) {
       return res.status(400).json({
         success: false,
@@ -375,23 +375,23 @@ app.post('/api/elements/sync', (req, res) => {
       });
     }
     
-    // 记录同步前的元素数量
+    // Record element count before sync
     const beforeCount = elements.size;
     
-    // 1. 清空现有内存存储
+    // 1. Clear existing memory storage
     elements.clear();
     logger.info(`Cleared existing elements: ${beforeCount} elements removed`);
     
-    // 2. 批量写入新数据
+    // 2. Batch write new data
     let successCount = 0;
     const processedElements = [];
     
     frontendElements.forEach((element, index) => {
       try {
-        // 确保元素有ID，如果没有则生成一个
+        // Ensure element has ID, generate one if missing
         const elementId = element.id || generateId();
         
-        // 添加服务端元数据
+        // Add server metadata
         const processedElement = {
           ...element,
           id: elementId,
@@ -401,7 +401,7 @@ app.post('/api/elements/sync', (req, res) => {
           version: 1
         };
         
-        // 存储到内存
+        // Store to memory
         elements.set(elementId, processedElement);
         processedElements.push(processedElement);
         successCount++;
@@ -413,7 +413,7 @@ app.post('/api/elements/sync', (req, res) => {
     
     logger.info(`Sync completed: ${successCount}/${frontendElements.length} elements synced`);
     
-    // 3. 广播同步事件给所有WebSocket客户端
+    // 3. Broadcast sync event to all WebSocket clients
     broadcast({
       type: 'elements_synced',
       count: successCount,
@@ -421,7 +421,7 @@ app.post('/api/elements/sync', (req, res) => {
       source: 'manual_sync'
     });
     
-    // 4. 返回同步结果
+    // 4. Return sync results
     res.json({
       success: true,
       message: `Successfully synced ${successCount} elements`,