Restore accidentally removed files, a few additional import/calculation fixes

inventory-server/dashboard/google-server/utils/logger.js

@@ -0,0 +1,35 @@
+const winston = require('winston');
+const path = require('path');
+
+const logger = winston.createLogger({
+  level: process.env.LOG_LEVEL || 'info',
+  format: winston.format.combine(
+    winston.format.timestamp(),
+    winston.format.json()
+  ),
+  transports: [
+    new winston.transports.File({
+      filename: path.join(__dirname, '../logs/pm2/error.log'),
+      level: 'error',
+      maxsize: 10485760, // 10MB
+      maxFiles: 5
+    }),
+    new winston.transports.File({
+      filename: path.join(__dirname, '../logs/pm2/combined.log'),
+      maxsize: 10485760, // 10MB
+      maxFiles: 5
+    })
+  ]
+});
+
+// Add console transport in development
+if (process.env.NODE_ENV !== 'production') {
+  logger.add(new winston.transports.Console({
+    format: winston.format.combine(
+      winston.format.colorize(),
+      winston.format.simple()
+    )
+  }));
+}
+
+module.exports = logger;