fix(nvim): remove the underline from diff view

dotfiles/.config/nvim/lua/autocmd.lua

@@ -7,6 +7,7 @@ local groups = {
   filetype = vim.api.nvim_create_augroup("FT", { clear = true }),
   folding = vim.api.nvim_create_augroup("Folding", { clear = true }),
   terminal = vim.api.nvim_create_augroup("Terminal", { clear = true }),
+  diffview = vim.api.nvim_create_augroup("DiffView", { clear = true }),
 }
 
 vim.api.nvim_create_autocmd("TermEnter", {
@@ -79,3 +80,51 @@ vim.api.nvim_create_autocmd("FileType", {
     vim.wo.conceallevel = 2
   end,
 })
+
+vim.api.nvim_create_autocmd("BufEnter", {
+  -- INFO: Work around https://github.com/neovim/neovim/issues/9800
+  desc = "Remove the underline in diff view",
+
+  group = groups.diffview,
+  pattern = "*",
+  callback = function()
+    local hl_name = "CursorLine"
+
+    local set_cursor_hl = function(cursor_hl, opts)
+      vim.F.npcall(
+        vim.api.nvim_set_hl,
+        0,
+        hl_name,
+        vim.tbl_deep_extend("force", cursor_hl or {}, opts or {})
+      )
+    end
+
+    local get_cursor_hl = function()
+      local rgb_hl = {}
+      local hl = vim.F.npcall(vim.api.nvim_get_hl, 0, { name = hl_name })
+
+      if hl then
+        for _, key in ipairs({ "fg", "bg" }) do
+          local color = hl[key]
+          rgb_hl[key] = color and string.format("#%06x", color) or nil
+        end
+      end
+
+      return rgb_hl
+    end
+
+    if vim.opt.diff:get() then
+      if not vim.g.__cursor_hl then
+        vim.g.__cursor_hl = get_cursor_hl()
+
+        set_cursor_hl(vim.g.__cursor_hl, { ctermfg = "white" })
+      end
+    else
+      if vim.g.__cursor_hl then
+        set_cursor_hl(vim.g.__cursor_hl)
+      end
+
+      vim.g.__cursor_hl = nil
+    end
+  end,
+})

dotfiles/.config/nvim/lua/config/catppuccin-config.lua

@@ -37,9 +37,6 @@ local config = {
 
       TabLineSel = { bg = colors.red },
 
-      -- INFO: Work around https://github.com/neovim/neovim/issues/9800
-      CursorLine = { ctermfg = "White" },
-
       ["@neorg.tags.ranged_verbatim.code_block"] = { bg = colors.surface0 },
 
       SagaBorder = { fg = colors.surface1 },