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/stress.ts

@@ -50,10 +50,15 @@ async function runStressRoom(
   let chaosFired = 0;
   const errors: ScenarioError[] = [];
 
+  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}`);
 
     // Background chaos loop — runs concurrently with the game turn loop.
     // Delay the first tick by 3 seconds so room creation + joiners + game
@@ -90,12 +95,17 @@ async function runStressRoom(
 
     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 — ${result.turns} turns`);
       ctx.logger.info('game_complete', {
         room: roomId,
         game: gameNum + 1,
         turns: result.turns,
       });
     } else {
+      ctx.dashboard.incrementMetric('errors');
+      ctx.dashboard.log('error', `${roomId}: game ${gameNum + 1} failed — ${result.error}`);
       errors.push({
         room: roomId,
         reason: 'game_failed',