Previously, the client couldn't retrieve the latest player stats from the `client.get_genshin_user()` function without first browsing the application. It was necessary to call `client.get_record_cards()` to trigger a refresh.
Previously, all templates were named with the .html extension, which caused problems for editors to recognize the Jinja2 syntax used in them. In this commit, all templates have been renamed to use the .jinja2 extension to better reflect their use of Jinja2 and to improve editor recognition.
