Post 1.6.0

New Features

• post send command for sending SMTP emails (#9)
• Protocol-based API key scopes (imap / smtp) with backward-compatible defaults
• SMTP keychain credential support (separate from IMAP)
• Config-based SMTP credentials (fallback option)

Dependencies

• SwiftMCP 1.4.2 (early-arrival uploads, Swift 6.1)
• SwiftMail 1.4.0 (SMTP send support)
• SwiftText 1.1.6

Breaking Changes

• Renamed build plugin to PostVersionGeneratorPlugin to avoid naming collision with SwiftText

Upgrade Notes

• Existing API keys default to imap scope only (safe default)
• To enable sending: post api-key create --servers <id> --scopes imap,smtp
• SMTP credentials required: post credential set --server <id> --smtp