Web settings cannot toggle shared advanced preferences #32026

Description

In v2 settings, the Advanced section was rendered only on desktop. That hid Navigation controls and Custom agents from web users even though web code consumes those settings. Navigation controls affect the v2 title bar, and Custom agents controls the composer agent picker and agent commands.

Plugins

N/A

OpenCode version

dev

Steps to reproduce

1. Open the web app.
2. Open Settings -> General.
3. Look for Navigation controls or Custom agents.
4. The settings are not available, even though the web UI behavior reads those preferences.

Screenshot and/or share link

N/A

Operating System

N/A

Terminal

N/A