feat: implement structured logging across server components

- Integrated a centralized logging system using createLogger from @automaker/utils, replacing console.log and console.error statements with logger methods for consistent log formatting and improved readability.
- Updated various modules, including auth, events, and services, to utilize the new logging system, enhancing error tracking and operational visibility.
- Refactored logging messages to provide clearer context and information, ensuring better maintainability and debugging capabilities.

This update significantly enhances the observability of the server components, facilitating easier troubleshooting and monitoring.

apps/server/src/lib/auth.ts

@@ -12,6 +12,9 @@ import type { Request, Response, NextFunction } from 'express';
 import crypto from 'crypto';
 import path from 'path';
 import * as secureFs from './secure-fs.js';
+import { createLogger } from '@automaker/utils';
+
+const logger = createLogger('Auth');
 
 const DATA_DIR = process.env.DATA_DIR || './data';
 const API_KEY_FILE = path.join(DATA_DIR, '.api-key');
@@ -61,11 +64,11 @@ function loadSessions(): void {
       }
 
       if (loadedCount > 0 || expiredCount > 0) {
-        console.log(`[Auth] Loaded ${loadedCount} sessions (${expiredCount} expired)`);
+        logger.info(`Loaded ${loadedCount} sessions (${expiredCount} expired)`);
       }
     }
   } catch (error) {
-    console.warn('[Auth] Error loading sessions:', error);
+    logger.warn('Error loading sessions:', error);
   }
 }
 
@@ -81,7 +84,7 @@ async function saveSessions(): Promise<void> {
       mode: 0o600,
     });
   } catch (error) {
-    console.error('[Auth] Failed to save sessions:', error);
+    logger.error('Failed to save sessions:', error);
   }
 }
 
@@ -95,7 +98,7 @@ loadSessions();
 function ensureApiKey(): string {
   // First check environment variable (Electron passes it this way)
   if (process.env.AUTOMAKER_API_KEY) {
-    console.log('[Auth] Using API key from environment variable');
+    logger.info('Using API key from environment variable');
     return process.env.AUTOMAKER_API_KEY;
   }
 
@@ -104,12 +107,12 @@ function ensureApiKey(): string {
     if (secureFs.existsSync(API_KEY_FILE)) {
       const key = (secureFs.readFileSync(API_KEY_FILE, 'utf-8') as string).trim();
       if (key) {
-        console.log('[Auth] Loaded API key from file');
+        logger.info('Loaded API key from file');
         return key;
       }
     }
   } catch (error) {
-    console.warn('[Auth] Error reading API key file:', error);
+    logger.warn('Error reading API key file:', error);
   }
 
   // Generate new key
@@ -117,9 +120,9 @@ function ensureApiKey(): string {
   try {
     secureFs.mkdirSync(path.dirname(API_KEY_FILE), { recursive: true });
     secureFs.writeFileSync(API_KEY_FILE, newKey, { encoding: 'utf-8', mode: 0o600 });
-    console.log('[Auth] Generated new API key');
+    logger.info('Generated new API key');
   } catch (error) {
-    console.error('[Auth] Failed to save API key:', error);
+    logger.error('Failed to save API key:', error);
   }
   return newKey;
 }
@@ -129,7 +132,7 @@ const API_KEY = ensureApiKey();
 
 // Print API key to console for web mode users (unless suppressed for production logging)
 if (process.env.AUTOMAKER_HIDE_API_KEY !== 'true') {
-  console.log(`
+  logger.info(`
 ╔═══════════════════════════════════════════════════════════════════════╗
 ║  🔐 API Key for Web Mode Authentication                               ║
 ╠═══════════════════════════════════════════════════════════════════════╣
@@ -142,7 +145,7 @@ if (process.env.AUTOMAKER_HIDE_API_KEY !== 'true') {
 ╚═══════════════════════════════════════════════════════════════════════╝
 `);
 } else {
-  console.log('[Auth] API key banner hidden (AUTOMAKER_HIDE_API_KEY=true)');
+  logger.info('API key banner hidden (AUTOMAKER_HIDE_API_KEY=true)');
 }
 
 /**
@@ -177,7 +180,7 @@ export function validateSession(token: string): boolean {
   if (Date.now() > session.expiresAt) {
     validSessions.delete(token);
     // Fire-and-forget: persist removal asynchronously
-    saveSessions().catch((err) => console.error('[Auth] Error saving sessions:', err));
+    saveSessions().catch((err) => logger.error('Error saving sessions:', err));
     return false;
   }
 

apps/server/src/lib/events.ts

@@ -3,6 +3,9 @@
  */
 
 import type { EventType, EventCallback } from '@automaker/types';
+import { createLogger } from '@automaker/utils';
+
+const logger = createLogger('Events');
 
 // Re-export event types from shared package
 export type { EventType, EventCallback };
@@ -21,7 +24,7 @@ export function createEventEmitter(): EventEmitter {
         try {
           callback(type, payload);
         } catch (error) {
-          console.error('Error in event subscriber:', error);
+          logger.error('Error in event subscriber:', error);
         }
       }
     },

apps/server/src/lib/sdk-options.ts

@@ -19,6 +19,9 @@ import type { Options } from '@anthropic-ai/claude-agent-sdk';
 import os from 'os';
 import path from 'path';
 import { resolveModelString } from '@automaker/model-resolver';
+import { createLogger } from '@automaker/utils';
+
+const logger = createLogger('SdkOptions');
 import {
   DEFAULT_MODELS,
   CLAUDE_MODEL_MAP,
@@ -332,8 +335,8 @@ function buildMcpOptions(config: CreateSdkOptionsConfig): McpPermissionOptions {
  */
 function buildThinkingOptions(thinkingLevel?: ThinkingLevel): Partial<Options> {
   const maxThinkingTokens = getThinkingTokenBudget(thinkingLevel);
-  console.log(
-    `[SDK-Options] buildThinkingOptions: thinkingLevel="${thinkingLevel}" -> maxThinkingTokens=${maxThinkingTokens}`
+  logger.debug(
+    `buildThinkingOptions: thinkingLevel="${thinkingLevel}" -> maxThinkingTokens=${maxThinkingTokens}`
   );
   return maxThinkingTokens ? { maxThinkingTokens } : {};
 }

apps/server/src/lib/version.ts

@@ -5,6 +5,9 @@
 import { readFileSync } from 'fs';
 import { fileURLToPath } from 'url';
 import { dirname, join } from 'path';
+import { createLogger } from '@automaker/utils';
+
+const logger = createLogger('Version');
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
@@ -27,7 +30,7 @@ export function getVersion(): string {
     cachedVersion = version;
     return version;
   } catch (error) {
-    console.warn('Failed to read version from package.json:', error);
+    logger.warn('Failed to read version from package.json:', error);
     return '0.0.0';
   }
 }