fix responsehandler creating in chat_handler

- make small adjustments to response handler

Author: frankroeder

lua/parrot/chat_handler.lua

@@ -778,7 +778,7 @@ function ChatHandler:_chat_respond(params)
 
         -- prepare invisible buffer for the model to write to
         local topic_buf = vim.api.nvim_create_buf(false, true)
-        local topic_resp_handler = ResponseHandler:new(self.queries, topic_buf, nil, 0, false, "", false_free_cursor)
+        local topic_resp_handler = ResponseHandler:new(self.queries, topic_buf, nil, 0, false, "", false)
         local topic_handler = topic_resp_handler:create_handler()
         topic_prov:set_model(self.providers[topic_prov.name].topic.model)
 

lua/parrot/response_handler.lua

@@ -29,7 +29,7 @@ function ResponseHandler:new(queries, buffer, window, line, first_undojoin, pref
   self.window = window
   self.prefix = prefix or ""
   self.cursor = cursor or false
-  self.first_line = line or (window and vim.api.nvim_win_get_cursor(window)[1] - 1 or 0)
+  self.first_line = line or vim.api.nvim_win_get_cursor(window)[1] - 1
   self.finished_lines = 0
   self.response = ""
   self.queries = queries
@@ -78,6 +78,7 @@ end
 function ResponseHandler:update_response(chunk)
   if chunk ~= nil then
     self.response = self.response .. chunk
+    utils.undojoin(self.buffer)
   end
 end