Release v1.0.0: RedDrill Mandrill Template Manager

Features:
- Mandrill template management with real-time sync
- Visual HTML editor with GrapeJS integration
- Template testing with placeholder preview
- Import/export functionality with unified UI
- Tree and table view modes
- Template translation with AI support
- Audit trail system with D1 database
- Template placeholders and dynamic testing

Tech Stack:
- Next.js 16 with App Router
- Tailwind CSS 4
- Cloudflare Workers AI
- D1 Database for audit trail
- Prisma ORM