Add experimental thread queue APIs to app server (#38456)

## What changed

- Add experimental `thread/queue/add`, `list`, `update`, `delete`, `reorder`, and `start` requests for persistent queued user submissions.
- Automatically dispatch queued submissions in FIFO order after completed or failed turns, while leaving the queue paused after interruption.
- Emit `thread/queue/changed` notifications and expose paginated queue contents with stable submission and client message IDs.
- Export the new protocol types through the generated JSON Schema and TypeScript bindings.

## Testing

- Add app-server integration coverage for capability gating, CRUD, pagination, capacity limits, notifications, automatic dispatch, cold-thread resume, interruption, and explicit queue starts.

GitOrigin-RevId: 89caf5577192199bda77cf6c372a59d26cdd910e

codex-rs/tui/src/chatwidget/protocol.rs

@@ -199,6 +199,7 @@ impl ChatWidget {
             | ServerNotification::ThreadStarted(_)
             | ServerNotification::ThreadStatusChanged(_)
             | ServerNotification::ThreadReverted(_)
+            | ServerNotification::ThreadQueueChanged(_)
             | ServerNotification::ThreadArchived(_)
             | ServerNotification::ThreadDeleted(_)
             | ServerNotification::ThreadUnarchived(_)