Before you begin
Please make sure you're using the latest version of the templ CLI (go install github.com/a-h/templ/cmd/templ@latest), and have upgraded your project to use the latest version of the templ runtime (go get -u github.com/a-h/templ@latest)

Running on head of main: 9b34663

Describe the bug
A clear and concise description of what the bug is.

Run templ generate --include-version=false -cmd "go run main.go" when main.go contains code that reads terminal. E.g.

import "golang.org/x/term"

if term.IsTerminal(0) {
	width, _, err := term.GetSize(0)
	println("Terminal width:", width)
}

This will print 0 because terminal can't be detected

To Reproduce
A small, self-contained, complete reproduction, uploaded to a GitHub repo, containing the minimum amount of files required to reproduce the behaviour, along with a list of commands that need to be run. Keep it simple.

See above reproducible example.

Expected behavior
A clear and concise description of what you expected to happen.

term.IsTerminal(0) should return true