Okay, I can help you set up the structure for this multi-functional web application. We'll create the basic HTML layout, CSS for styling, and JavaScript files to handle the logic for each section.
Note: For the weather feature, you will need to sign up for a free weather API service (like OpenWeatherMap) and add your API key to the JavaScript code where indicated. Also, the "Auto Stay Open" feature's effectiveness can be limited by browser security policies.
This sets up the basic HTML structure, CSS styling (including theme placeholders and basic layout), and separate JavaScript files for configuration, UI interactions, games, YouTube, weather, settings, and a main entry point.
Remember to:
'YOUR_API_KEY_HERE' in config.js with your actual OpenWeatherMap API key.config.js and potentially adjust the updateBackgroundAndMusic function in weather.js to apply them correctly based on the conditionInfo.background and conditionInfo.music values.about:blank and "Auto Stay Open" features, as browser behavior can vary.