feat(nudge): name the sender; blink lobby cards; re-animate toasts

The "waiting for your move" popup was the nudge (chat.nudge), shown without a
sender name. Resolve the nudger's per-game seat name server-side and carry it on
a new NudgeEvent.sender_name field, so:

- the in-app toast reads "<opponent>: Waiting for your move 🤭" (chat.nudgeBy);
- the out-of-app Telegram push names the sender too (render nudgeBy);

falling back to the plain phrase when the name is absent (RU mirrored). The
your_turn toast already named the opponent and is unchanged.

Lobby: when a card transitions into "your turn" or "finished" while the lobby is
open, its status emoji blinks twice (two 1s fades); the opponent's-turn change
stays in place. Blink state is keyed by game id (SvelteSet + per-id nonce/timer)
so overlapping events animate in isolation; suppressed under reduce-motion.

Toast: a per-message seq re-keys Toast.svelte, so the freshest toast cancels the
previous one and replays its entrance, uniformly on every screen.

Tests: notify.Nudge round-trip + render named/fallback (Go), game.Service.SeatName
(integration), codec/i18n/gamePhase/shouldBlink (UI). Docs (FUNCTIONAL +_ru,
UI_DESIGN) + PLAN TODO-7 (deferred FLIP card-relocation animation) updated.

ui/src/lib/app.svelte.ts

@@ -34,6 +34,9 @@ import type { BoardLabelMode } from './boardlabels';
 export interface Toast {
   kind: 'error' | 'info';
   text: string;
+  /** A monotonic id bumped on every showToast, so the Toast component re-keys and replays its
+   *  entrance — the freshest toast cancels the previous one and starts its own appear cycle. */
+  seq: number;
 }
 
 export const app = $state<{
@@ -95,6 +98,7 @@ export const app = $state<{
 let unsubscribeStream: (() => void) | null = null;
 let reconnectTimer: ReturnType<typeof setTimeout> | null = null;
 let toastTimer: ReturnType<typeof setTimeout> | null = null;
+let toastSeq = 0;
 
 // Background/foreground tracking, to silence the reconnect banner during a normal app
 // suspend (iOS lock / home, Telegram tab switch) and reconnect quietly on return.
@@ -135,7 +139,7 @@ function goForeground(): void {
 }
 
 export function showToast(text: string, kind: Toast['kind'] = 'info'): void {
-  app.toast = { kind, text };
+  app.toast = { kind, text, seq: ++toastSeq };
   if (toastTimer) clearTimeout(toastTimer);
   toastTimer = setTimeout(() => (app.toast = null), 4000);
 }
@@ -223,7 +227,9 @@ function openStream(): void {
           showToast(e.message.kind === 'nudge' ? t('chat.nudge') : e.message.body, 'info');
         }
       } else if (e.kind === 'nudge') {
-        showToast(t('chat.nudge'), 'info');
+        // Name the nudger (their per-game seat name, carried on the event), so the toast reads
+        // "<opponent>: …" like the your-turn toast; fall back to the plain phrase when absent.
+        showToast(e.senderName ? t('chat.nudgeBy', { name: e.senderName }) : t('chat.nudge'), 'info');
       } else if (e.kind === 'your_turn') {
         // Name the player who moved just before this one (the previous seat in turn order), so the
         // toast reads the same in games with any number of players. Fall back to the bare label when

ui/src/lib/codec.test.ts

@@ -54,6 +54,24 @@ describe('codec', () => {
     expect(decodeDraftView(b.asUint8Array())).toBe('{"x":1}');
   });
 
+  it('decodes a nudge event carrying the sender name', () => {
+    const b = new Builder(64);
+    const gid = b.createString('g1');
+    const from = b.createString('u2');
+    const name = b.createString('Ann');
+    fb.NudgeEvent.startNudgeEvent(b);
+    fb.NudgeEvent.addGameId(b, gid);
+    fb.NudgeEvent.addFromUserId(b, from);
+    fb.NudgeEvent.addSenderName(b, name);
+    b.finish(fb.NudgeEvent.endNudgeEvent(b));
+    expect(decodeEvent('nudge', b.asUint8Array())).toEqual({
+      kind: 'nudge',
+      gameId: 'g1',
+      fromUserId: 'u2',
+      senderName: 'Ann',
+    });
+  });
+
   it('round-trips a feedback submit and decodes state + unread', () => {
     const att = new Uint8Array([1, 2, 3, 4]);
     const req = fb.FeedbackSubmitRequest.getRootAsFeedbackSubmitRequest(

ui/src/lib/codec.ts

@@ -537,7 +537,7 @@ export function decodeEvent(kind: string, payload: Uint8Array): PushEvent | null
       return { kind: 'chat_message', message: decodeChatMsg(fb.ChatMessage.getRootAsChatMessage(bb)) };
     case 'nudge': {
       const e = fb.NudgeEvent.getRootAsNudgeEvent(bb);
-      return { kind: 'nudge', gameId: s(e.gameId()), fromUserId: s(e.fromUserId()) };
+      return { kind: 'nudge', gameId: s(e.gameId()), fromUserId: s(e.fromUserId()), senderName: s(e.senderName()) };
     }
     case 'match_found': {
       const e = fb.MatchFoundEvent.getRootAsMatchFoundEvent(bb);

ui/src/lib/i18n.test.ts

@@ -18,6 +18,11 @@ describe('i18n catalog', () => {
     expect(translate('en', 'game.yourTurnBy', { name: 'Ann' })).toBe('Ann: Your turn!');
   });
 
+  it('names the nudger in the cross-game nudge toast', () => {
+    expect(translate('ru', 'chat.nudgeBy', { name: 'Аня' })).toBe('Аня: Жду Вашего хода 🤭');
+    expect(translate('en', 'chat.nudgeBy', { name: 'Ann' })).toBe('Ann: Waiting for your move 🤭');
+  });
+
   it('localizes move-history action labels', () => {
     expect(translate('ru', 'move.exchange')).toBe('обмен');
     expect(translate('ru', 'move.pass')).toBe('пас');

ui/src/lib/i18n/en.ts

@@ -114,7 +114,8 @@ export const en = {
 
   'chat.placeholder': 'Quick message…',
   'chat.send': 'Send',
-  'chat.nudge': 'Waiting for your move!',
+  'chat.nudge': 'Waiting for your move 🤭',
+  'chat.nudgeBy': '{name}: Waiting for your move 🤭',
   'chat.nudgeAction': 'Nudge',
   'chat.awaitingReply': "Waiting for the opponent's reply",
   'chat.empty': 'No messages yet.',

ui/src/lib/i18n/ru.ts

@@ -115,7 +115,8 @@ export const ru: Record<MessageKey, string> = {
 
   'chat.placeholder': 'Короткое сообщение…',
   'chat.send': 'Отправить',
-  'chat.nudge': 'Жду вашего хода!',
+  'chat.nudge': 'Жду Вашего хода 🤭',
+  'chat.nudgeBy': '{name}: Жду Вашего хода 🤭',
   'chat.nudgeAction': 'Поторопить',
   'chat.awaitingReply': 'Ждём реакцию соперника',
   'chat.empty': 'Сообщений пока нет.',

ui/src/lib/lobbysort.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest';
-import { groupGames, isMyTurn } from './lobbysort';
+import { gamePhase, groupGames, isMyTurn, shouldBlink } from './lobbysort';
 import type { GameView, Seat } from './model';
 
 const ME = 'me';
@@ -82,3 +82,28 @@ describe('groupGames', () => {
     expect(isMyTurn(game('x', 'open', 0, 0), ME)).toBe(true);
   });
 });
+
+describe('gamePhase', () => {
+  it('maps each game to its lobby bucket (open folds into mine/theirs like active)', () => {
+    expect(gamePhase(game('x', 'active', 0, 0), ME)).toBe('mine');
+    expect(gamePhase(game('x', 'active', 1, 0), ME)).toBe('theirs');
+    expect(gamePhase(game('x', 'open', 0, 0), ME)).toBe('mine');
+    expect(gamePhase(game('x', 'open', 1, 0), ME)).toBe('theirs');
+    expect(gamePhase(game('x', 'finished', 0, 0), ME)).toBe('finished');
+  });
+});
+
+describe('shouldBlink', () => {
+  it('blinks on a transition into mine or finished', () => {
+    expect(shouldBlink('theirs', 'mine')).toBe(true);
+    expect(shouldBlink('mine', 'finished')).toBe(true);
+    expect(shouldBlink('theirs', 'finished')).toBe(true);
+  });
+
+  it('stays quiet on a transition into theirs, a no-op, or a first sighting', () => {
+    expect(shouldBlink('mine', 'theirs')).toBe(false);
+    expect(shouldBlink('mine', 'mine')).toBe(false);
+    expect(shouldBlink(undefined, 'mine')).toBe(false);
+    expect(shouldBlink(undefined, 'finished')).toBe(false);
+  });
+});

ui/src/lib/lobbysort.ts

@@ -12,6 +12,29 @@ export function isMyTurn(game: GameView, myId: string): boolean {
   return (game.status === 'active' || game.status === 'open') && !!me && game.toMove === me.seat;
 }
 
+/** LobbyPhase is a game's lobby bucket — which of the three card sections it currently sits in. */
+export type LobbyPhase = 'mine' | 'theirs' | 'finished';
+
+/**
+ * gamePhase reports a game's lobby bucket for myId: 'finished' for any non-active/open status,
+ * else 'mine' when it is the caller's turn, else 'theirs'. It mirrors groupGames' partition and
+ * drives the per-card blink, which fires when a card transitions into 'mine' or 'finished'.
+ */
+export function gamePhase(game: GameView, myId: string): LobbyPhase {
+  if (game.status !== 'active' && game.status !== 'open') return 'finished';
+  return isMyTurn(game, myId) ? 'mine' : 'theirs';
+}
+
+/**
+ * shouldBlink reports whether a card's bucket change should fire the attention blink: only a
+ * transition into 'mine' (it became your turn) or 'finished' (the game ended) does — an
+ * opponent's-turn change is in-place. A first observation (prev === undefined) never blinks, so a
+ * cold render and games arriving from another screen stay quiet.
+ */
+export function shouldBlink(prev: LobbyPhase | undefined, next: LobbyPhase): boolean {
+  return prev !== undefined && prev !== next && (next === 'mine' || next === 'finished');
+}
+
 /** LobbyGroups holds the three ordered lobby sections. */
 export interface LobbyGroups {
   yourTurn: GameView[];

ui/src/lib/model.ts

@@ -307,7 +307,7 @@ export type PushEvent =
   | { kind: 'opponent_moved'; gameId: string; move?: MoveRecord; game?: GameView; bagLen: number }
   | { kind: 'game_over'; gameId: string; result: string; scoreLine: string; game?: GameView }
   | { kind: 'chat_message'; message: ChatMessage }
-  | { kind: 'nudge'; gameId: string; fromUserId: string }
+  | { kind: 'nudge'; gameId: string; fromUserId: string; senderName: string }
   | { kind: 'match_found'; gameId: string; state?: StateView }
   | { kind: 'opponent_joined'; gameId: string; state?: StateView }
   | { kind: 'notify'; sub: string; account?: AccountRef; invitation?: Invitation; state?: StateView }