Update implementation docs to reflect completed email system: - Database models (EmailTemplate, VendorEmailTemplate) - Email service enhancements (language/template/branding resolution) - Admin and Vendor API endpoints - UI features and pages - Template variables and categories - Usage examples and file structure 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>