refactor: message content (#1424)

lua/avante/sidebar.lua

@@ -392,6 +392,7 @@ local function transform_result_content(selected_files, result_content, prev_fil
     elseif line_content == "<think>" then
       is_thinking = true
       last_think_tag_start_line = i
+      last_think_tag_end_line = 0
     elseif line_content == "</think>" then
       is_thinking = false
       last_think_tag_end_line = i
@@ -2356,6 +2357,7 @@ function Sidebar:create_input_container(opts)
       end
     end
 
+    ---@type AvanteLLMMessage[]
     local history_messages = {}
     for i = #chat_history, 1, -1 do
       local entry = chat_history[i]
@@ -2368,11 +2370,9 @@ function Sidebar:create_input_container(opts)
       then
         break
       end
-      table.insert(
-        history_messages,
-        1,
-        { role = "assistant", content = Utils.trim_think_content(entry.original_response) }
-      )
+      local assistant_content = {}
+      table.insert(assistant_content, { type = "text", text = Utils.trim_think_content(entry.original_response) })
+      table.insert(history_messages, 1, { role = "assistant", content = assistant_content })
       local user_content = ""
       if entry.selected_file ~= nil then
         user_content = user_content .. "SELECTED FILE: " .. entry.selected_file.filepath .. "\n\n"
@@ -2386,9 +2386,18 @@ function Sidebar:create_input_container(opts)
           .. "\n```\n\n"
       end
       user_content = user_content .. "USER PROMPT:\n\n" .. entry.request
-      table.insert(history_messages, 1, { role = "user", content = user_content })
+      table.insert(history_messages, 1, {
+        role = "user",
+        content = {
+          {
+            type = "text",
+            text = user_content,
+          },
+        },
+      })
     end
 
+    ---@type AvanteGeneratePromptsOptions
     return {
       ask = opts.ask or true,
       project_context = vim.json.encode(project_context),