Revert "refactor: message content (#1424)" (#1442)

This reverts commit ae8497faf1.

lua/avante/providers/bedrock/claude.lua

@@ -16,7 +16,74 @@ M.role_map = {
   assistant = "assistant",
 }
 
-M.parse_messages = Claude.parse_messages
+function M.parse_messages(opts)
+  ---@type AvanteBedrockClaudeMessage[]
+  local messages = {}
+
+  for _, message in ipairs(opts.messages) do
+    table.insert(messages, {
+      role = M.role_map[message.role],
+      content = {
+        {
+          type = "text",
+          text = message.content,
+        },
+      },
+    })
+  end
+
+  if opts.tool_histories then
+    for _, tool_history in ipairs(opts.tool_histories) do
+      if tool_history.tool_use then
+        local msg = {
+          role = "assistant",
+          content = {},
+        }
+        if tool_history.tool_use.thinking_contents then
+          for _, thinking_content in ipairs(tool_history.tool_use.thinking_contents) do
+            msg.content[#msg.content + 1] = {
+              type = "thinking",
+              thinking = thinking_content.content,
+              signature = thinking_content.signature,
+            }
+          end
+        end
+        if tool_history.tool_use.response_contents then
+          for _, response_content in ipairs(tool_history.tool_use.response_contents) do
+            msg.content[#msg.content + 1] = {
+              type = "text",
+              text = response_content,
+            }
+          end
+        end
+        msg.content[#msg.content + 1] = {
+          type = "tool_use",
+          id = tool_history.tool_use.id,
+          name = tool_history.tool_use.name,
+          input = vim.json.decode(tool_history.tool_use.input_json),
+        }
+        messages[#messages + 1] = msg
+      end
+
+      if tool_history.tool_result then
+        messages[#messages + 1] = {
+          role = "user",
+          content = {
+            {
+              type = "tool_result",
+              tool_use_id = tool_history.tool_result.tool_use_id,
+              content = tool_history.tool_result.content,
+              is_error = tool_history.tool_result.is_error,
+            },
+          },
+        }
+      end
+    end
+  end
+
+  return messages
+end
+
 M.parse_response = Claude.parse_response
 
 ---@param prompt_opts AvantePromptOptions