Data flows

TODO: this page will trace each data flow end to end: iMessage capture via FDA, Apple Mail capture via FDA (preferred over Google OAuth – see memory/project_apple_mail_structural_moat.md), WhatsApp Web, calendar (CalDAV + Google), browsing capture (Safari + Chrome extensions), and the outbound channels (notification, draft reply, calendar invite).

Use a diagram per flow. Make explicit what crosses the network, when, and why. This page must agree byte-for-byte with the Privacy section.

Owner: @andy. Cross-reference: ARCHITECTURE_DIAGRAMS.md, ARCHITECTURE_DRIFT.md.