Restructured settings into sub-pages, exposed 10+ new API-backed controls, added push notification management.

[cbl]

Added

Composables (@repo/api)

• useAccountPreferences() — optimistic wrapper for PATCH /accounts/update_credentials (locked, discoverable, hideCollections, bot, source.language/privacy/sensitive). Patches currentUser synchronously, rolls back on server error.
• usePushSubscription() — full Web Push lifecycle: browser permission, VAPID key from instance, PushManager subscribe/unsubscribe, Mastodon POST/PUT/DELETE /push/subscription, per-type alert toggles.

Components (@repo/ui)

• <SettingsSection> — titled group header with optional description.
• <SettingsNavItem> — navigation row (internal route / external link / button) with optional badge and chevron/↗ icon.

Pages

• /settings/privacy — posting defaults (visibility, language, sensitive), sensitive content display (media visibility moved from appearance), account visibility (locked, discoverable, hideCollections, bot), content links (blocked/muted).
• /settings/notifications — push notification master toggle, 7 per-type alert toggles (mention, follow, reblog, favourite, poll, status, update), browser permission flow.
• /settings/appearance — theme, autoplay GIFs, reduce motion.

Infrastructure

• public/push-sw.js — service worker for push event handling + notification click.
• Updated plugins/unregister-sw.client.ts to register the push SW instead of unregistering all SWs.

Changed

• /settings index — stripped to profile card + account status + category nav (Privacy & safety, Notifications, Appearance) + logout. Removed Early Access and About sections (already accessible from nav).
• Media visibility control moved from Appearance → Privacy & safety under "Sensitive content" section. Labels clarified: "Default" → "Only sensitive", "Show all" → "Show all media", "Hide all" → "Hide all media".

New settings exposed (previously unavailable)

Setting	API field
Require follow approval	locked
Show in profile directory	discoverable
Hide follows/followers	hideCollections
Mark as automated account	bot
Default post language	source.language
Push: mentions	alerts.mention
Push: new followers	alerts.follow
Push: boosts	alerts.reblog
Push: favourites	alerts.favourite
Push: poll results	alerts.poll
Push: new posts	alerts.status
Push: post edits	alerts.update