amirmarandidev/proxygosha ? reverse-engineered prompt

Build me a simple Telegram WEB proxy that runs on a Cloudflare Worker and can be deployed on the free tier.

I want it to be a single worker script with a setup page, where I can set one admin password and then open a private panel at my domain plus that key. From that panel I should be able to get the connection details for Telegram, including easy one tap links and the manual server, port, and secret values. It should support a custom domain, and if I add extra domains, the panel should show them too.

If possible, make it look like a normal website when someone opens the root URL, with an option to use a decoy page instead of the default one. Keep the setup as simple as possible, and make sure changing the password does not break old links unless that is unavoidable and clearly handled. If you need to check current Cloudflare or Telegram docs to match the latest proxy setup, go ahead and look them up online.