Better Auth generates non-UUID user IDs (e.g., otUe1YrfENPdHnrF3g1vSBfpkQfambCZ).
Changed all user_id columns from uuid to text type to prevent
"invalid input syntax for type uuid" errors.
Also documented this requirement in:
- .claude/guidelines/authentication.md (new User ID Format section)
- .claude/guidelines/database.md (User ID Column Type section)
- apps/todo/CLAUDE.md (Database Schema section)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
- Add vCard/CSV file import with duplicate detection and merge options
- Add Google Contacts OAuth2 integration for importing from Google
- Add vCard/CSV export with format selection and filtering options
- Add connected_accounts table for OAuth token storage
- Add FileUploader, ImportPreview, GoogleImport components
- Add ExportModal with format selection (vCard/CSV)
- Add i18n translations for import/export (DE/EN)