fc8180d2

By: Michael Lynch <git@mtlynch.io>

Inline renderLogin into loginGet

renderLogin existed to render the login page with a caller-supplied status
code, but its status parameter was dead (always http.StatusOK) and was
removed in the previous commit. What remained was a single-caller method
whose only job was building the data struct and calling renderTemplate -
exactly what the sibling page handlers do inline. Fold it into loginGet's
closure and delete the method.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>