fix(soak): multi-hole round transitions, token refresh, dashboard wiring

- Session loop now handles round_over by clicking #ss-next-btn (the
  scoresheet modal button) instead of exiting early. Waits for next
  round or game_over before continuing.
- SessionPool detects expired tokens on acquire and re-logins
  automatically, writing fresh credentials to .env.stresstest.
- Added 2s post-game delay before goto('/') so the server can process
  game completion before WebSocket disconnect.
- Wired dashboard metrics (games_completed, moves_total, errors),
  activity log entries, and player tiles for both populate and stress
  scenarios.
- Bumped screencast resolution to 960x540 and set headless viewport
  to 960x800 for better click-to-watch framing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/soak/scenarios/populate.ts

@@ -50,9 +50,15 @@ async function runRoom(
   let completed = 0;
   const errors: ScenarioError[] = [];
 
+  // Send player list for dashboard tiles
+  ctx.dashboard.update(roomId, {
+    players: sessions.map((s) => ({ key: s.key, score: null, isActive: false })),
+  });
+
   for (let gameNum = 0; gameNum < cfg.gamesPerRoom; gameNum++) {
     if (ctx.signal.aborted) break;
     ctx.dashboard.update(roomId, { game: gameNum + 1, totalGames: cfg.gamesPerRoom });
+    ctx.dashboard.log('info', `${roomId}: starting game ${gameNum + 1}/${cfg.gamesPerRoom}`);
     ctx.logger.info('game_start', { room: roomId, game: gameNum + 1 });
 
     const result = await runOneMultiplayerGame(ctx, sessions, {
@@ -66,6 +72,9 @@ async function runRoom(
 
     if (result.completed) {
       completed++;
+      ctx.dashboard.incrementMetric('games_completed');
+      ctx.dashboard.incrementMetric('moves_total', result.turns);
+      ctx.dashboard.log('info', `${roomId}: game ${gameNum + 1} complete — ${result.turns} turns, ${(result.durationMs / 1000).toFixed(1)}s`);
       ctx.logger.info('game_complete', {
         room: roomId,
         game: gameNum + 1,
@@ -73,6 +82,8 @@ async function runRoom(
         durationMs: result.durationMs,
       });
     } else {
+      ctx.dashboard.incrementMetric('errors');
+      ctx.dashboard.log('error', `${roomId}: game ${gameNum + 1} failed — ${result.error}`);
       errors.push({
         room: roomId,
         reason: 'game_failed',