docs: refresh README and integration docs
- Add JellyGlance screenshots to docs assets
- Move screenshot tour into a dedicated docs gallery page
- Add Screenshots to the docs nav and sidebar
- Redesign integrations docs with local app icon cards
- Add self-hosted app icons for Jellyfin, Arr apps, download clients, and webhooks
- Improve README with badges, hero preview, feature map, and collapsible screenshot galleries
- Add package metadata for homepage, repository, bugs, and keywords
- Update docs social/SEO metadata
fix(auth): respect Jellyfin Quick Connect user roles
- Sign Quick Connect sessions as the approving Jellyfin user
- Return per-token account identity from config
- Enforce JellyGlance role permissions on protected API routes
- Block disabled Quick Connect accounts