fix(offline): hotseat finished-game medals by final score (fix all-last-place on a tie)

Reported: a hotseat game ended by 6 scoreless passes deducts each rack
(correct rule, same as online: -8/-14/-8 here), which tied two seats for
the lead. The engine's winner() returns -1 on a tie, so seatMedal read it
as a full draw and gave EVERY seat the last-place medal.

- result.ts: seatMedal now ranks by the FINAL score (competition ranking —
  a tie for the lead shares the trophy), not the single-winner flag. A
  resigned / host-excluded seat places last with no medal and does not push
  the others down.
- model.ts: Seat.resigned (offline-only); engine.resignedOf getter; the
  local source surfaces it on the game view.
- The scoreless rack deduction is unchanged (standard rules, owner-confirmed).

ui/src/lib/localgame/engine.ts

@@ -240,6 +240,10 @@ export class LocalGame {
   handOf(player: number): number[] {
     return [...this.hands[player]];
   }
+  /** resignedOf reports whether a seat has resigned or been excluded by the host. */
+  resignedOf(player: number): boolean {
+    return this.resigned[player] ?? false;
+  }
   /** winnerIndex is the finished game's winner, or -1 (tie / in progress / aborted). */
   get winnerIndex(): number {
     return winner(this.over, this.reason, this.scores, this.resigned);

ui/src/lib/localgame/source.hotseat.test.ts

@@ -101,6 +101,19 @@ describe('LocalSource hotseat', () => {
     expect((st as StateView).game.status).toBe('finished');
   });
 
+  it('exposes a host-excluded seat as resigned in the view (for the medal ranking)', async () => {
+    const src = await hotseat('local:hR', [
+      { kind: 'human', name: 'A' },
+      { kind: 'human', name: 'B' },
+      { kind: 'human', name: 'C' },
+    ], '4321');
+    await src.hostAction('local:hR', '4321', 'resign', 1); // exclude seat 1 (game continues: 2 active)
+    const st = await src.gameState('local:hR');
+    expect(st.game.seats[1].resigned).toBe(true);
+    expect(st.game.seats[0].resigned).toBe(false);
+    expect(st.game.seats[2].resigned).toBe(false);
+  });
+
   it('lets the host terminate the game, deleting it', async () => {
     const src = await hotseat('local:h6', [
       { kind: 'human', name: 'A' },

ui/src/lib/localgame/source.ts

@@ -464,6 +464,7 @@ export class LocalSource implements GameLoopSource {
       score: game.scoreOf(i),
       hintsUsed: 0,
       isWinner: game.isOver && i === game.winnerIndex,
+      resigned: game.resignedOf(i),
     }));
     return {
       id: record.id,

ui/src/lib/model.ts

@@ -29,6 +29,9 @@ export interface Seat {
   score: number;
   hintsUsed: number;
   isWinner: boolean;
+  /** Offline hotseat only: the seat resigned or was excluded by the host. Set by the local source so
+   *  the finished-game medal ranking can place it last (no medal); undefined for online seats. */
+  resigned?: boolean;
 }
 
 export interface GameView {

ui/src/lib/result.test.ts

@@ -2,13 +2,14 @@ import { describe, expect, it } from 'vitest';
 import { resultBadge, seatMedal } from './result';
 import type { GameView, Seat } from './model';
 
-const seat = (s: number, accountId: string, score: number, isWinner = false): Seat => ({
+const seat = (s: number, accountId: string, score: number, isWinner = false, resigned = false): Seat => ({
   seat: s,
   accountId,
   displayName: accountId,
   score,
   hintsUsed: 0,
   isWinner,
+  resigned,
 });
 
 function game(seats: Seat[], status = 'finished', toMove = 0): GameView {
@@ -81,23 +82,27 @@ describe('seatMedal', () => {
     expect(seatMedal(game([seat(0, 'a', 5), seat(1, 'b', 3)], 'active'), 0)).toBe('');
   });
 
-  it('finished two-player: winner gets the trophy, the other second place', () => {
+  it('finished: places each seat by final score', () => {
-    const g = game([seat(0, 'a', 300, true), seat(1, 'b', 200)]);
-    expect(seatMedal(g, 0)).toBe('🏆');
-    expect(seatMedal(g, 1)).toBe('🥈');
-  });
-
-  it('finished draw (no winner): every seat gets the medal', () => {
-    const g = game([seat(0, 'a', 200), seat(1, 'b', 200)]);
-    expect(seatMedal(g, 0)).toBe('🏅');
-    expect(seatMedal(g, 1)).toBe('🏅');
-  });
-
-  it('finished four-player: places each seat by score', () => {
     const g = game([seat(0, 'a', 100), seat(1, 'b', 400, true), seat(2, 'c', 300), seat(3, 'd', 200)]);
-    expect(seatMedal(g, 1)).toBe('🏆'); // winner
+    expect(seatMedal(g, 1)).toBe('🏆'); // 400 → 1st
-    expect(seatMedal(g, 2)).toBe('🥈'); // 2nd by score
+    expect(seatMedal(g, 2)).toBe('🥈'); // 300 → 2nd
-    expect(seatMedal(g, 3)).toBe('🥉'); // 3rd
+    expect(seatMedal(g, 3)).toBe('🥉'); // 200 → 3rd
-    expect(seatMedal(g, 0)).toBe('🏅'); // 4th
+    expect(seatMedal(g, 0)).toBe('🏅'); // 100 → 4th
+  });
+
+  it('a tie for the lead shares first place; the rest place below (competition ranking)', () => {
+    // The owner's case: a scoreless end deducted racks to -8 / -14 / -8, tying seats 0 and 2 for the
+    // lead — they must SHARE the trophy, not all show the last-place medal (the reported bug).
+    const g = game([seat(0, 'a', -8), seat(1, 'b', -14), seat(2, 'c', -8)]);
+    expect(seatMedal(g, 0)).toBe('🏆');
+    expect(seatMedal(g, 2)).toBe('🏆');
+    expect(seatMedal(g, 1)).toBe('🥉'); // two seats rank above it → 3rd
+  });
+
+  it('an excluded / resigned seat gets no medal and does not push the others down', () => {
+    const g = game([seat(0, 'a', 50), seat(1, 'b', 900, false, true), seat(2, 'c', 30)]);
+    expect(seatMedal(g, 1)).toBe(''); // resigned: no medal, though its frozen score is the highest
+    expect(seatMedal(g, 0)).toBe('🏆'); // ranked among the rest: highest → 1st
+    expect(seatMedal(g, 2)).toBe('🥈');
   });
 });

ui/src/lib/result.ts

@@ -34,17 +34,16 @@ export function resultBadge(game: GameView, myId: string): ResultBadge {
 /**
  * seatMedal returns a per-SEAT place emoji for a finished game (empty while it is still in progress),
  * so a hotseat game can show each player's medal on their plaque instead of a single viewer-centric
- * "you won/lost" (which is meaningless with 2-4 local players). The winner takes the trophy; the
+ * "you won/lost" (which is meaningless with 2-4 local players). It ranks by the FINAL score with
- * rest place by score (a draw — no
+ * competition ranking (equal scores share a place), so a tie for the lead SHARES the trophy rather
- * winner — gives every seat the medal). Mirrors the ranking in resultBadge, keyed by seat not viewer.
+ * than reading as a full draw. A resigned / host-excluded seat places last, with no medal, and does
+ * not push the remaining players down. Ranked by score, not by the engine's single-winner flag
+ * (which is -1 on any tie for the lead — the reported all-last-place bug).
  */
 export function seatMedal(game: GameView, seat: number): string {
   if (game.status !== 'finished') return '';
   const s = game.seats.find((x) => x.seat === seat);
-  if (!s) return '';
+  if (!s || s.resigned) return '';
-  if (s.isWinner) return '🏆';
+  const rank = 1 + game.seats.filter((x) => !x.resigned && x.score > s.score).length;
-  if (!game.seats.some((x) => x.isWinner)) return '🏅'; // a draw: no winner
+  return rank === 1 ? '🏆' : rank === 2 ? '🥈' : rank === 3 ? '🥉' : '🏅';
-  const ahead = game.seats.filter((x) => !x.isWinner && x.seat !== seat && x.score > s.score).length;
-  const rank = 2 + ahead;
-  return rank === 2 ? '🥈' : rank === 3 ? '🥉' : '🏅';
 }