Disable Borders
By default AstroNvim unifies the user interface to utilize rounded borders. If you prefer other border types such as setting borders to "none" then you currently must do this for each individual plugin which has configurable borders. This can be easily configured with the vim.opt.winborder configuration setting. Here is some example code:
return { { "AstroNvim/astrocore", ---@type AstroCoreOpts opts = { options = { opt = { winborder = "none", }, }, }, },}