Settings: section highlight stays on General after switching sections #459

Seen while dogfooding Ace Canary 0.0.46.60.

Steps

1. Open Settings (Ace Canary → Settings…). It opens on General, with General highlighted.
2. Click Providers, then This Mac.

Expected: the highlight moves to the section you're on.
Actual: the content switches, but General stays highlighted and Providers/This Mac never are.

If Settings opens straight to a section (Check for Updates… opens Updates), that section is highlighted correctly.

Notes

• The clicks were made with accessibility presses from the desktop tools, which don't move the pointer. A real mouse click may behave differently.
• apps/app/src/settings.tsx sets aria-current from section, which is the same state that switches the content. So the stuck highlight may be a focus or hover style rather than aria-current.

Part of #5.