Notification System — Email/SMS alerts for signals and leads

[GareBear99]

Overview

Add email and SMS notification system for high-priority signals — price drops, new hot listings, lead activity.

Scope

• Price drop alerts — notify when tracked listings reduce price
• New listing alerts — notify for listings matching saved criteria (area, beds, price range)
• Hot lead alerts — immediate notification when a lead scores 'hot'
• Daily digest — summary email of pipeline activity
• Configurable thresholds — user sets what triggers notifications

Technical Options

• Email: SendGrid, Mailgun, or SES
• SMS: Twilio
• Push: Web Push API (pairs well with PWA from Mobile Responsive — Phone/tablet optimization + PWA support #8)

Acceptance Criteria

• At least email notifications working
• Configurable alert rules in Settings
• Unsubscribe/mute per alert type
• Rate limiting to prevent alert fatigue