The panel improvised its own title + free-form paragraph + ghost buttons,
breaking the established Settings structure. Rebuilt it like Audio/Playback/
Appearance: a GroupHeader ("OFFLINE CACHE") + SettingRow rows (label +
description + a SecondaryButton control on the right) — Manage offline cache /
Cache folder / Clear offline cache. No panel-level title (the left sub-nav
names the section). Keeps the layout consistent for the offline settings we'll
add here later.
cc