The continuous scroll was wrong for Instance — its sub-panels are
fundamentally different page types (user table, storage tool, bitrate
matrix, toggles). Revert to conditional rendering.
The hook now supports two modes:
- Scroll mode (default): smooth scroll + IntersectionObserver spy
- Tab mode (onNavigate callback): sidebar sub-links switch tabs
Instance uses tab mode. The scroll-spy infrastructure remains for
future panels that benefit from it (e.g. Account sections).
Also reverts GeneralPanel to sticky save bar since it's on its own
page again with no overlap risk.
- Memoize context value in SettingsSectionsProvider
- Use ctxRef pattern in hook to avoid depending on ctx object
in useLayoutEffect deps (ctx object changes on every render,
causing effect → setState → re-render → effect loop)
Jannis Braun