Add relay server for remote HTTPS access

Node.js/TypeScript relay server that enables remote access to MacroPad:
- WebSocket-based communication between desktop and relay
- Password authentication with bcrypt hashing
- Session management with consistent IDs
- REST API proxying to desktop app
- Web client WebSocket relay
- Login page and PWA-ready app page
- Designed for cloud-node-container deployment

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

macropad-relay/src/utils/logger.ts

@@ -0,0 +1,36 @@
+// Logger utility using Winston
+
+import winston from 'winston';
+import { config } from '../config';
+
+const logFormat = winston.format.combine(
+  winston.format.timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }),
+  winston.format.errors({ stack: true }),
+  winston.format.printf(({ level, message, timestamp, stack }) => {
+    return `${timestamp} [${level.toUpperCase()}]: ${stack || message}`;
+  })
+);
+
+export const logger = winston.createLogger({
+  level: config.logLevel,
+  format: logFormat,
+  transports: [
+    new winston.transports.Console({
+      format: winston.format.combine(
+        winston.format.colorize(),
+        logFormat
+      )
+    })
+  ]
+});
+
+// Add file transport in production
+if (!config.isDevelopment) {
+  logger.add(new winston.transports.File({
+    filename: 'error.log',
+    level: 'error'
+  }));
+  logger.add(new winston.transports.File({
+    filename: 'combined.log'
+  }));
+}