fix: disable DevTools in production builds

- Remove automatic DevTools opening in production mode
- Keep DevTools only for development mode (!isTest)
- Add comment explaining DevTools behavior
- Ensure clean production user experience

DevTools will now only open when:
- NODE_ENV === 'development'
- NODE_ENV !== 'test'

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

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

Author: kwonah0

electron/main.js

@@ -52,10 +52,7 @@ const createWindow = () => {
     }
   } else {
     mainWindow.loadFile(path.join(__dirname, '../dist/index.html'));
-    // Only open DevTools in production if not testing
-    if (!isTest) {
-      mainWindow.webContents.openDevTools();
-    }
+    // DevTools only open in development mode for production builds
   }
 
   mainWindow.once('ready-to-show', () => {