v0.7.0 — Design Editor, Billing & Subscriptions

- Publication Design Editor: Full-screen theme customizer with live preview, auto-generated color palettes, and custom font selection to make your publication truly yours - Pro Plans & Billing: Free and Pro tiers with Stripe-powered billing and plan history - AT Protocol Subscriptions: Readers can subscribe to publications directly through the AT Protocol — free and built on open standards - Subscriber Dashboard: Redesigned subscribers view with separate ATP and Email tabs and identity resolution - Account Settings Overhaul: Unified settings page with billing history, profile editing, and app preferences - Custom Domains: Domain onboarding UI with DNS verification and status tracking - Welcome Overlay: Optional subscribe/welcome prompt on publication homepages to convert visitors into subscribers