fix(ui): green both lobby scores on a tie, mute a 0:0 board

The lobby tinted only the viewer's own number, and a tie counted as
"leading" — so an even score showed only the viewer's number green,
reading as if the viewer were ahead. A fresh 0:0 board did the same,
accenting the start of a game where nobody has scored.

scoreStanding is now per-seat: the viewer's seat stays green when
leading or tied and red when trailing; an opponent's seat greens only
when it ties the viewer for the lead, so an equal non-zero score paints
both numbers green. When the top score is 0 (nobody has moved) every
number is left muted, like a finished game.

ui/src/lib/lobbysort.test.ts

@@ -126,22 +126,42 @@ describe('scoreStanding', () => {
       { ...seat(1, 'opp'), score: oppScore },
     ],
   });
+  const at = (g: GameView, accountId: string): Seat => g.seats.find((s) => s.accountId === accountId)!;
 
-  it('greens a leading or tied active game, reds a losing one', () => {
-    expect(scoreStanding(withScores('active', 30, 10), ME)).toBe('win');
-    expect(scoreStanding(withScores('active', 10, 10), ME)).toBe('win'); // a tie counts as green
-    expect(scoreStanding(withScores('active', 5, 10), ME)).toBe('lose');
+  it('greens the leading viewer and reds a trailing one; the opponent stays muted', () => {
+    const lead = withScores('active', 30, 10);
+    expect(scoreStanding(lead, ME, at(lead, ME))).toBe('win');
+    expect(scoreStanding(lead, ME, at(lead, 'opp'))).toBeNull(); // a trailing opponent is not coloured
+
+    const behind = withScores('active', 5, 10);
+    expect(scoreStanding(behind, ME, at(behind, ME))).toBe('lose');
+    expect(scoreStanding(behind, ME, at(behind, 'opp'))).toBeNull(); // a leading opponent is not coloured
+  });
+
+  it('greens both seats on an equal non-zero score', () => {
+    const tie = withScores('active', 10, 10);
+    expect(scoreStanding(tie, ME, at(tie, ME))).toBe('win');
+    expect(scoreStanding(tie, ME, at(tie, 'opp'))).toBe('win');
+  });
+
+  it('leaves a fresh 0:0 board muted (nobody has scored yet)', () => {
+    const fresh = withScores('active', 0, 0);
+    expect(scoreStanding(fresh, ME, at(fresh, ME))).toBeNull();
+    expect(scoreStanding(fresh, ME, at(fresh, 'opp'))).toBeNull();
   });
 
   it('is null for any non-active game (open or finished)', () => {
-    expect(scoreStanding(withScores('finished', 30, 10), ME)).toBeNull();
-    expect(scoreStanding(withScores('open', 0, 0), ME)).toBeNull();
+    const fin = withScores('finished', 30, 10);
+    expect(scoreStanding(fin, ME, at(fin, ME))).toBeNull();
+    const op = withScores('open', 0, 0);
+    expect(scoreStanding(op, ME, at(op, ME))).toBeNull();
   });
 
   it('is null when the viewer is not seated or has no opponent', () => {
-    expect(scoreStanding(withScores('active', 30, 10), 'stranger')).toBeNull();
+    const g = withScores('active', 30, 10);
+    expect(scoreStanding(g, 'stranger', at(g, ME))).toBeNull();
     const solo: GameView = { ...game('g', 'active', 0, 0), seats: [{ ...seat(0, ME), score: 9 }] };
-    expect(scoreStanding(solo, ME)).toBeNull();
+    expect(scoreStanding(solo, ME, solo.seats[0])).toBeNull();
   });
 
   it('compares against the strongest opponent in a multiplayer game', () => {
@@ -151,10 +171,26 @@ describe('scoreStanding', () => {
       seats: [
         { ...seat(0, ME), score: 40 },
         { ...seat(1, 'a'), score: 35 },
-        { ...seat(2, 'b'), score: 50 }, // b is ahead -> losing
+        { ...seat(2, 'b'), score: 50 }, // b is ahead -> the viewer is losing
       ],
     };
-    expect(scoreStanding(g3, ME)).toBe('lose');
+    expect(scoreStanding(g3, ME, at(g3, ME))).toBe('lose');
+    expect(scoreStanding(g3, ME, at(g3, 'b'))).toBeNull(); // a leading opponent is not coloured
+  });
+
+  it('greens every seat tied with the viewer for the lead in a multiplayer game', () => {
+    const g3: GameView = {
+      ...game('g', 'active', 0, 0),
+      players: 3,
+      seats: [
+        { ...seat(0, ME), score: 40 },
+        { ...seat(1, 'a'), score: 40 }, // tied with the viewer for the lead -> green
+        { ...seat(2, 'b'), score: 20 }, // trailing -> muted
+      ],
+    };
+    expect(scoreStanding(g3, ME, at(g3, ME))).toBe('win');
+    expect(scoreStanding(g3, ME, at(g3, 'a'))).toBe('win');
+    expect(scoreStanding(g3, ME, at(g3, 'b'))).toBeNull();
   });
 });
 

ui/src/lib/lobbysort.ts

@@ -3,7 +3,7 @@
 // games — each ordered by last activity: your-turn oldest-first (the longest-neglected on
 // top), the other two newest-first.
 
-import type { GameView } from './model';
+import type { GameView, Seat } from './model';
 
 /** isMyTurn reports whether an active game's seat-to-move belongs to the caller. */
 export function isMyTurn(game: GameView, myId: string): boolean {
@@ -13,18 +13,26 @@ export function isMyTurn(game: GameView, myId: string): boolean {
 }
 
 /**
- * scoreStanding colours the viewer's own score on an in-progress game: 'win' when leading or
- * tied (green), 'lose' when trailing (red). It is null for any game that is not active (open or
- * finished — finished games show the result emoji instead) or where myId is not seated against
- * an opponent, so the lobby leaves those numbers in the muted default.
+ * scoreStanding colours a single seat's score on an in-progress game, viewed by myId. The
+ * viewer's own seat is 'win' (green) when it leads or ties for the lead and 'lose' (red) when it
+ * trails; any other seat is 'win' only when it ties the viewer for the lead, so an equal score
+ * paints both numbers green — otherwise an opponent's number keeps the muted default. It returns
+ * null (every number muted) for a game that is not active (open or finished — finished games show
+ * the result emoji instead), for a fresh 0:0 board where nobody has scored yet, and when myId is
+ * not seated against an opponent.
  */
-export function scoreStanding(game: GameView, myId: string): 'win' | 'lose' | null {
+export function scoreStanding(game: GameView, myId: string, seat: Seat): 'win' | 'lose' | null {
   if (game.status !== 'active') return null;
   const me = game.seats.find((s) => s.accountId === myId);
   if (!me) return null;
   const others = game.seats.filter((s) => s.accountId && s.accountId !== myId).map((s) => s.score);
   if (!others.length) return null;
-  return me.score >= Math.max(...others) ? 'win' : 'lose';
+  const top = Math.max(me.score, ...others);
+  if (top === 0) return null; // nobody has scored yet: leave the 0:0 board muted, like a finished game
+  const meLeads = me.score === top;
+  if (seat.accountId === myId) return meLeads ? 'win' : 'lose';
+  // Another seat greens only when it ties the leading viewer at the top — the equal-score case.
+  return meLeads && seat.score === top ? 'win' : null;
 }
 
 /**