- Create shared AuthGateModal component in @manacore/shared-auth-ui
- Migrate 4 apps to use shared component: chat, todo, contacts, calendar
- Remove duplicate local AuthGateModal components
- Support for 'save', 'sync', 'feature', 'ai' actions
- Built-in i18n (DE + EN) with custom translation support
- Optional migration info display for session data
- Uses Phosphor icons from @manacore/shared-icons
- Update CONSISTENCY_REPORT.md
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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