GeminiCLI.com Feedback: [ISSUE]

### URL of the page with the issue

https://geminicli.com/

### What is the problem?

Install and find authentication succeeds AND fails, saying this tool is deprecated and I should switch to Antigravity. Why does this still exist if it's obsolete? Need a CLI for remote systems.

### What did you expect to happen?

I expected authentication in the CLI to match what I see in the browser (authentication succeeded) and continue to use just the CLI on a server, not go set up all of Antigravity for a simple CLI.

### Additional context

_No response_

Start by reproducing the install and authentication flow described for geminicli.com, comparing CLI behavior with authentication in the browser. Investigate how the CLI handles the deprecation message and server use, then verify that the resulting behavior matches the documented expectation for continued CLI authentication.

Written by the indexing model from the issue text.