test: D1-12 enforce BoundedToolLoop via config.chat_max_tool_rounds

lib/bds/ai/chat.ex

@@ -411,7 +411,7 @@ defmodule BDS.AI.Chat do
              tools,
              runtime,
              opts,
-             @chat_max_tool_rounds
+             chat_max_tool_rounds()
            ),
          {:ok, reply} <-
            maybe_generate_chat_title(conversation.id, user_message.content, reply, opts) do
@@ -752,6 +752,14 @@ defmodule BDS.AI.Chat do
     ChatTools.available_specs(project_id, Catalog.model_capabilities(model))
   end
 
+  # BoundedToolLoop: the tool-calling round count is capped by
+  # config.chat_max_tool_rounds (falling back to the built-in default).
+  defp chat_max_tool_rounds do
+    :bds
+    |> Application.get_env(:chat, [])
+    |> Keyword.get(:max_tool_rounds, @chat_max_tool_rounds)
+  end
+
   defp chat_system_prompt(project_id, tools) do
     base = get_setting("ai.system_prompt") || @default_system_prompt