[BUG] FtResponse breaks toasts

[jsandeo]

Describe the bug
Wrapping the response with FtResponse() apparently breaks toasts, meaning the toast won't show in the browser.

Minimal Reproducible Example

from fasthtml.common import *

app, rt = fast_app(hdrs=(picolink,))
setup_toasts(app)

@rt("/")
def get(sess):
  add_toast(sess, 'This toast will show!', 'success')
  return Div('Aloha!')

@rt("/notoast")
def get(sess):
  add_toast(sess, 'This toast won\'t show!', 'success')
  return FtResponse(Div('Aloha!'))

serve()

Expected behavior
Toasts should show in the browser.

Environment Information
Please provide the following version information:

• fastlite version: 0.0.10
• fastcore version: 1.7.9
• fasthtml version: 0.6.9

Confirmation
Please confirm the following:

• [✓] I have read the FAQ (https://docs.fastht.ml/explains/faq.html)
• [✓] I have provided a minimal reproducible example
• [✓] I have included the versions of fastlite, fastcore, and fasthtml
• [✓] I understand that this is a volunteer open source project with no commercial support.

Additional context
I used FtResponse() so I could set a non-200 status_code for the response (such as 422 for a form POST having validation errors), maybe there is a simpler way to do just that... but I guess toasts should work anyway when using FtResponse().

Screenshots