Shipped: Campaign wizard & generated outreach package

## Shipped
- **5-step wizard**: audience → offer → tone (formal / neutral / casual) → taboos → follow-up count (1–3).
- Generates a **package**: **subject**, **first email**, **numbered follow-ups**, **pre-send checklist** using local generators (no LLM required for the default generation path).

## Notes
Saving campaigns to storage is covered in the campaigns persistence issue.