Notifications: My Notifications, expanded event catalog, self-hosting recipe - Notifications.md: document the per-person "My Notifications" relay page (setup, access-control/mute behavior, privacy), the per-bot event catalog expanding from 4 to 22 events across 6 new categories, and a real self-hosting recipe (apt install, server.yml settings, fronting with a Cloudflare Tunnel or Tailscale Funnel, and the Cloudflare 1010/User-Agent gotcha). - New Custom-Domain.md page (previously untracked here) plus a cross-link note that one tunnel can front multiple hostnames/services. - Home.md, _Sidebar.md, Multi-VPS-Controller.md: small consistency updates carried over from the same working copy. Changelog.md intentionally not published in this pass - it references v3.21.2/v3.21.3 which aren't cut as GitHub releases yet (latest tagged is v3.21.1); will follow once those versions are actually released.