Group invites, font uploads, and Agillic feedback

This week improves team access setup, reusable brand fonts, and Agillic publishing feedback.

✓Fixes

• Workspace & adminWhen admins invite a teammate to specific groups, those group assignments are now preserved when the teammate accepts the invite.
• Workspace & adminRe-inviting a teammate who was previously removed now restores their membership cleanly, so admins can update their groups, template access, integration access, and folder permissions again.
• Design SystemsCampaign EditorBrand .woff fonts can now be uploaded consistently from both design-system and email-editor font flows.
• IntegrationsAgillic export and sync failures now show the provider validation message in the review flow instead of a generic sync error, so teams can fix the issue before retrying.