fix(mappings): use get_messages for quickfix answers (#1466)

Closes #1465

Signed-off-by: Tomas Slusny <[email protected]>

Author: deathbeam

lua/CopilotChat/config/mappings.lua

@@ -275,9 +275,10 @@ return {
     normal = 'gqa',
     callback = function()
       local items = {}
-      for i, message in ipairs(copilot.chat.messages) do
+      local messages = copilot.chat:get_messages()
+      for i, message in ipairs(messages) do
         if message.section and message.role == constants.ROLE.ASSISTANT then
-          local prev_message = copilot.chat.messages[i - 1]
+          local prev_message = messages[i - 1]
           local text = ''
           if prev_message then
             text = prev_message.content