Initial commit: Telegram Management System

Full-stack web application for Telegram management
- Frontend: Vue 3 + Vben Admin
- Backend: NestJS
- Features: User management, group broadcast, statistics

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

marketing-agent/services/claude-agent/src/utils/logger.js

@@ -0,0 +1,56 @@
+import winston from 'winston';
+
+const { combine, timestamp, printf, colorize, errors } = winston.format;
+
+// Custom log format
+const logFormat = printf(({ level, message, timestamp, stack, ...metadata }) => {
+    let msg = `${timestamp} [${level}] ${message}`;
+    
+    if (stack) {
+        msg += `\n${stack}`;
+    }
+    
+    if (Object.keys(metadata).length > 0) {
+        msg += ` ${JSON.stringify(metadata)}`;
+    }
+    
+    return msg;
+});
+
+// Create logger instance
+export const logger = winston.createLogger({
+    level: process.env.LOG_LEVEL || 'info',
+    format: combine(
+        errors({ stack: true }),
+        timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }),
+        logFormat
+    ),
+    transports: [
+        // Console transport
+        new winston.transports.Console({
+            format: combine(
+                colorize(),
+                logFormat
+            )
+        }),
+        // File transport for errors
+        new winston.transports.File({
+            filename: 'logs/error.log',
+            level: 'error',
+            maxsize: 10485760, // 10MB
+            maxFiles: 5
+        }),
+        // File transport for all logs
+        new winston.transports.File({
+            filename: 'logs/combined.log',
+            maxsize: 10485760, // 10MB
+            maxFiles: 10
+        })
+    ],
+    exceptionHandlers: [
+        new winston.transports.File({ filename: 'logs/exceptions.log' })
+    ],
+    rejectionHandlers: [
+        new winston.transports.File({ filename: 'logs/rejections.log' })
+    ]
+});