Mobile Remote creates a standalone task instead of a task under the current project

Description

In the iOS Codex Remote interface, opening a project and tapping the top-right New button creates a standalone top-level task instead of a new session associated with the current project.

Steps to reproduce

1. Connect to a Mac through Codex Remote on iOS.
2. Open an existing project.
3. Tap the top-right New button.
4. Start and complete a task.

Actual result

The task appears under the standalone Tasks section, not under the project that was open.

Expected result

When New is tapped from within a project, the new task should inherit that project/workspace. Alternatively, the UI should allow selecting the target project.

Environment

• iPhone and MacBook
• Latest iOS and macOS
• Latest Codex app

Related: #20757, #22819, #22806.