Magic login links let agents generate one-click portal access for users

Features

• Magic login links let agents generate one-click portal access for users
• Auto-generate sender email addresses on @agent.molted.email
• API keys are now auto-created on first visit to the portal keys page
• Portal dashboard shows recent activity, sender info, and domain details
• Domain Connect one-click DNS setup for supported providers

Fixes

• Fixed portal settings requiring an API key instead of using session auth
• Fixed tenant provisioning quotas not matching billing plans
• Fixed approval review flow not working in the portal
• Fixed duplicate send requests returning a 500 error instead of an idempotent response
• Fixed magic login tokens not using signed cookies