Stage 8: UI social/account/history surfaces

Wire the deferred Stage 7 surfaces end-to-end (UI -> gateway transcode ->
backend REST -> existing domain services): friends (incl. one-time friend
codes), per-user blocks, friend-game invitations, profile editing + email
binding, the statistics screen, and the in-game history + GCG export.

Friends gain two add paths (interview decision, a deliberate plan change):
one-time 6-digit codes (friend_codes table, 12h TTL, single-use, rate-limited
redeem); and play-gated requests (shared game required) where an explicit
decline is permanent, an ignored request lapses after 30 days, and a code
bypasses a decline. Migration 00006 widens friendships_status_chk and adds
friend_codes.

Lobby notification badge is poll + push: a new generic `notify` event drives
it live; the client polls on open/focus. Language stays a single Settings
control that writes through to the durable account's preferred_language. GCG
export is finished-only (game.ErrGameActive) and shares/downloads the .gcg file.

Tests: backend unit + inttest (friend gate/decline/code, ListInvitations,
GetStats, GCG gate), gateway transcode round-trips + notify constructor, UI
vitest (codecs, win-rate, share choice) + Playwright social specs. Docs: PLAN
(Stage 8 done + refinements + TODO-5), ARCHITECTURE, FUNCTIONAL(+ru), UI_DESIGN,
TESTING, module READMEs.

ui/src/lib/mock/data.ts

@@ -4,7 +4,17 @@
 // not need to be strictly legal here — this is a visual/interaction fixture; real
 // legality and scoring come from the backend.
 
-import type { ChatMessage, GameView, MoveRecord, Profile, Seat, Session } from '../model';
+import type {
+  AccountRef,
+  ChatMessage,
+  GameView,
+  Invitation,
+  MoveRecord,
+  Profile,
+  Seat,
+  Session,
+  Stats,
+} from '../model';
 
 export const ME = 'me';
 
@@ -20,12 +30,43 @@ export const PROFILE: Profile = {
   displayName: 'You',
   preferredLanguage: 'en',
   timeZone: 'UTC',
+  awayStart: '00:00',
+  awayEnd: '07:00',
   hintBalance: 3,
   blockChat: false,
   blockFriendRequests: false,
-  isGuest: true,
+  isGuest: false,
 };
 
+// Seed social/account data for the mock (pnpm start + Playwright). The mock profile
+// is a durable account so the Stage 8 surfaces (friends, stats, history) are reachable.
+export const MOCK_FRIENDS: AccountRef[] = [
+  { accountId: 'ann', displayName: 'Ann' },
+  { accountId: 'kaya', displayName: 'Kaya' },
+];
+
+export const MOCK_INCOMING: AccountRef[] = [{ accountId: 'rick', displayName: 'Rick' }];
+
+export const MOCK_STATS: Stats = { wins: 7, losses: 4, draws: 1, maxGamePoints: 421, maxWordPoints: 95 };
+
+export function mockInvitations(): Invitation[] {
+  return [
+    {
+      id: 'inv1',
+      inviter: { accountId: 'kaya', displayName: 'Kaya' },
+      invitees: [{ accountId: ME, displayName: 'You', seat: 1, response: 'pending' }],
+      variant: 'english',
+      turnTimeoutSecs: 86400,
+      hintsAllowed: true,
+      hintsPerPlayer: 1,
+      dropoutTiles: 'remove',
+      status: 'pending',
+      gameId: '',
+      expiresAtUnix: Math.floor(Date.now() / 1000) + 7 * 86400,
+    },
+  ];
+}
+
 function seat(s: number, accountId: string, displayName: string, score: number, isWinner = false): Seat {
   return { seat: s, accountId, displayName, score, hintsUsed: 0, isWinner };
 }