use replace_word func instead of changekey

lua/base46/init.lua

@@ -158,14 +158,18 @@ M.toggle_theme = function()
 
   config.ui.theme = (themes[1] == config.ui.theme and themes[2]) or themes[1]
 
-  require("nvchad.utils").change_key_val("theme", config.ui.theme)
+  local old_theme = dofile(vim.fn.stdpath "config" .. "/lua/custom/chadrc.lua").ui.theme
+  require("nvchad.utils").replace_word(old_theme, config.ui.theme)
   M.load_all_highlights()
 end
 
 M.toggle_transparency = function()
   config.ui.transparency = not config.ui.transparency
   M.load_all_highlights()
-  require("nvchad.utils").change_key_val("transparency", config.ui.transparency)
+
+  local old_transparency_val = dofile(vim.fn.stdpath "config" .. "/lua/custom/chadrc.lua").ui.transparency
+  local new_transparency_val = "transparency = " .. tostring(config.ui.transparency)
+  require("nvchad.utils").replace_word("transparency = " .. tostring(old_transparency_val),new_transparency_val)
 end
 
 return M