Initial

server/services/logger.js

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+import fs from 'node:fs';
+import path from 'node:path';
+import winston from 'winston';
+import { config } from '../config.js';
+
+fs.mkdirSync(config.logDir, { recursive: true });
+
+const logFormat = winston.format.combine(
+  winston.format.timestamp(),
+  winston.format.errors({ stack: true }),
+  winston.format.json()
+);
+
+export const logger = winston.createLogger({
+  level: config.isProduction ? 'info' : 'debug',
+  format: logFormat,
+  transports: [
+    new winston.transports.File({ filename: path.join(config.logDir, 'system.log'), maxsize: 5_000_000, maxFiles: 5 }),
+    ...(!config.isProduction
+      ? [new winston.transports.Console({
+        format: winston.format.combine(winston.format.colorize(), winston.format.simple())
+      })]
+      : [])
+  ]
+});
+
+export function readSystemLog(limit = 300) {
+  // System logs are line-delimited JSON; malformed historic lines are returned as plain messages.
+  const file = path.join(config.logDir, 'system.log');
+  if (!fs.existsSync(file)) return [];
+  const content = fs.readFileSync(file, 'utf8');
+  return content
+    .trim()
+    .split('\n')
+    .filter(Boolean)
+    .slice(-limit)
+    .map((line) => {
+      try {
+        return JSON.parse(line);
+      } catch {
+        return { level: 'info', message: line };
+      }
+    });
+}