fix: cancel error (#1965)

lua/avante/llm.lua

@@ -699,7 +699,16 @@ function M._stream(opts)
           -- Special handling for cancellation signal from tools
           if error == LLMToolHelpers.CANCEL_TOKEN then
             Utils.debug("Tool execution was cancelled by user")
-            opts.on_chunk("\n*[Request cancelled by user during tool execution.]*\n")
+            if opts.on_chunk then opts.on_chunk("\n*[Request cancelled by user during tool execution.]*\n") end
+            if opts.on_messages_add then
+              local message = HistoryMessage:new({
+                role = "assistant",
+                content = "\n*[Request cancelled by user during tool execution.]*\n",
+              }, {
+                just_for_display = true,
+              })
+              opts.on_messages_add({ message })
+            end
             return opts.on_stop({ reason = "cancelled" })
           end
 
@@ -725,8 +734,10 @@ function M._stream(opts)
         if opts.on_chunk then opts.on_chunk("\n*[Request cancelled by user.]*\n") end
         if opts.on_messages_add then
           local message = HistoryMessage:new({
-            role = "user",
-            content = "[Request cancelled by user.]",
+            role = "assistant",
+            content = "\n*[Request cancelled by user.]*\n",
+          }, {
+            just_for_display = true,
           })
           opts.on_messages_add({ message })
         end

lua/avante/llm_tools/init.lua

@@ -1148,6 +1148,7 @@ function M.process_tool_use(tools, tool_use, on_log, on_complete, session_ctx)
               cancel_timer:stop()
               cancel_timer:close()
             end
+            Helpers.is_cancelled = false
             on_complete(nil, Helpers.CANCEL_TOKEN)
           end
         end)
@@ -1191,6 +1192,7 @@ function M.process_tool_use(tools, tool_use, on_log, on_complete, session_ctx)
   end, function(result, err)
     -- Check for cancellation before completing
     if Helpers.is_cancelled then
+      Helpers.is_cancelled = false
       if on_complete then on_complete(nil, Helpers.CANCEL_TOKEN) end
       return
     end

lua/avante/utils/init.lua

@@ -1513,9 +1513,8 @@ end
 ---@param messages avante.HistoryMessage[]
 ---@return avante.ui.Line[]
 function M.message_to_lines(message, messages)
-  local Line = require("avante.ui.line")
   local content = message.message.content
-  if type(content) == "string" then return { Line:new({ { content } }) } end
+  if type(content) == "string" then return M.text_to_lines(content) end
   if vim.islist(content) then
     local lines = {}
     for _, item in ipairs(content) do