Merge pull request #25 from ZeekoZhu/patch-1

add more models

fix(migration) Set the default value of the user foreign key of the m…

…essage model to 1 to resolve the migration error

Merge pull request #19 from xesrc/import_export_support

support for conversation export and import

Remove permission verification for the settings interface.

Add the "open_frugal_mode_control" setting option.

add django-simpleui to requirements.txt

fix(tokens): The maximum prompt token is calculated according to the …

…maximum response token passed in by the front-end

Add environment variable WORKER_TIMEOUT and conversation response hea…

…ders

Fix: Line breaks and spaces in Frequently prompts are filtered out.

Support Frugal Mode