- Groups CRUD in sidebar (create, rename, change color, reorder, delete)
- Collapsible group headers with color dots and server count
- "Move to Group" context menu on servers
- Group dropdown in ServerDialog (add/edit)
- 17 i18n keys (EN/RU/ZH)
- Search auto-expands groups
- Cleaned up old release binaries
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
