fix: bufferline integration w transparent_background

lua/catppuccin/core/integrations/bufferline.lua

@@ -1,11 +1,13 @@
 local M = {}
 
 function M.get(cp)
+  local transparent_background = require("catppuccin.config").options.transparent_background
+  local bg_highlight = transparent_background and "NONE" or cp.base
 
-	local inactive_bg = cp.mantle
+  local inactive_bg = transparent_background and "NONE" or cp.mantle
 
   return {
-		BufferLineFill = { bg = cp.crust },
+    BufferLineFill = { bg = bg_highlight },
     BufferLineBackcrust = { fg = cp.text, bg = inactive_bg }, -- others
     BufferLineBufferVisible = { fg = cp.surface1, bg = inactive_bg },
     BufferLineBufferSelected = { fg = cp.text, bg = cp.base, style = "bold,italic" }, -- current