Lock the polish behaviours so a future edit surfaces as a failing test:
- backend: UpdateProfile now rejects a bad name layout, an away window over 12h, and
a malformed offset timezone (confirming it wires the Stage 8 validators); a new
integration test accepts and resolves a "+03:00" offset timezone.
- e2e (mock): the lobby notification badge count, the play-with-friends required
game type + invitation send, the in-game add-to-friends flipping to a disabled
"request sent", the profile-edit invalid-name Save guard, and the chat send/nudge
icon buttons.
Engine: multi-player drop-out-and-continue with a per-game tile disposition (remove default / return), resigned seats skipped and excluded from the win, leaver rack never revealed; 2-player behaviour unchanged.
New domains (service/store, no HTTP yet): internal/social (friend request/accept graph, per-user blocks, per-game chat with nudge as a message kind, content filter via mvdan.cc/xurls/v2 + leet/separator normaliser + phone heuristic) and internal/lobby (in-memory variant-keyed matchmaking pool, friend-game invitations invite->accept with lazy 7-day expiry). account gains profile editing and the email confirm-code flow (Mailer seam: SMTP or log mailer).
Migration 00003_social.sql + regenerated jet. main wires the new services into the server (accessors for the Stage 6 handlers); robot substitution stays in Stage 5, REST/stream/push in Stage 6/8. Docs (PLAN, ARCHITECTURE, FUNCTIONAL+ru, TESTING, README) updated.
Ilia Denisov