#5335 "Emails Steward sends read as designed messages: an HTML alert email and weekly report, with a plain-text twin". - core/mail.py renders each email as multipart/alternative from templates/email/: a table-and-inline-style HTML part and a plain-text twin carrying the same facts. Colours are the design system's light theme, resolved from theme.css; nothing is fetched when a mail opens. - Alert email: state badge, a headline sentence ("Disk used on web01 is 94%."), rule, resource, reading, the condition in words, and the time in the zone Notifications was saved in with UTC beside it; "View in Steward" when Steward's address is set. Subject "[Steward] Firing: <rule> — <resource> 94%". Alerts now carry their operator. - Weekly report: monitors down, active alerts, the week's alert events, uptime and busiest Traefik routers as small tables with links. Sent from the configured From address; the "Generated … UTC" line and the stale repo footer are gone. - condition_text() states a condition from a rule's parts. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>