docs: clarify ChatGPT full access behavior

ChatGPT remote chats can continue requesting approvals even when Full access appears selected after reconnecting. Document how to select the mode, restart an affected task, and identify the upstream permission synchronization issue.

Author: dvdksn

content/manuals/ai/sandboxes/integrations/chatgpt.md

@@ -48,6 +48,19 @@ remote project.
 For more connection options, see the OpenAI instructions to
 [connect to an SSH host](https://learn.chatgpt.com/docs/remote-connections#connect-to-an-ssh-host).
 
+## Full access still prompts for approval
+
+ChatGPT controls Codex permissions separately from the Docker Sandbox. To run
+commands without Codex approval prompts, select **Full access** from the
+permissions menu for the remote chat. Enabling **Full access** under
+**Settings > General** only adds the mode to the permissions menu. It doesn't
+change an existing chat.
+
+If the chat continues to request approval while showing **Full access**, update
+the ChatGPT desktop app, then stop and restart the active task. Approval prompts
+that return after reconnecting can indicate a
+[Codex remote-permission synchronization issue](https://github.com/openai/codex/issues/29054).
+
 ## Related
 
 - [Editor and app integrations](_index.md) — how SSH access works and how to