Fix theme and change back to enter autocompletion.

init.lua

@@ -328,9 +328,9 @@ require('lazy').setup({
   {
     -- Theme
     'nyoom-engineering/oxocarbon.nvim',
-    priority = 1000,
     config = function()
       vim.cmd.colorscheme 'oxocarbon'
+      vim.opt.background = 'dark'
     end,
   },
 
@@ -898,7 +898,7 @@ require('lazy').setup({
         -- <c-k>: Toggle signature help
         --
         -- See :h blink-cmp-config-keymap for defining your own keymap
-        preset = 'default',
+        preset = 'enter',
 
         -- For more advanced Luasnip keymaps (e.g. selecting choice nodes, expansion) see:
         --    https://github.com/L3MON4D3/LuaSnip?tab=readme-ov-file#keymaps