feat: story rings on avatars, improved story strip, settings atoms
- Show gradient story ring on gallery card and popover avatars when
author has an active story, tapping opens story viewer
- Redesign "Your story" button to show viewer avatar with plus badge
and create/view menu when user has existing stories
- Filter own user from story author list to avoid duplication
- Extract SettingsGroup and SettingsToggleRow reusable atoms
- Refactor upload-defaults page to use new atoms
- Remove icons from settings hub rows
- Fix Avatar ring padding and hover clipping
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>