* Refactor `i18n` to `locale`
- Currently we're using the `i18n` variable naming for the `locale`
struct. This contains locale's specific information and cannot be used
for general i18n purpose, therefore refactoring it to `locale` makes
more sense.
- Ref: https://github.com/go-gitea/gitea/pull/20096#discussion_r906699200
* Update routers/install/install.go
* Remove fetch request from heatmap
Render heatmap data directly to HTML, eliminating one HTTP request on
frontpage and user profile. Also added min-height to the container so
the page content will no longer move after loading.
* rename and error display
* also log the js error
* add error handler
* remove useless inline style and hide divider on small screens
* Update routers/user/home.go
* Update routers/user/profile.go
