Energiemanager: Blackouts fuer Lehrer sichtbar machen

- game.html: bei Blackout sofort action:'blackout' an /progress feuern
  (setId/Tag/Block/Frequenz/Ursache, score:0) — Fehlversuch bleibt auch
  bei Set-Abbruch sichtbar, kein player_progress/Sterne.
- progress.php: neuer action:'blackout' -> eigene assessments-Zeile,
  KEIN XP/plays/best_stars.
- live.php: Blackout-Flag (event:'blackout') durch die Tag-Summary reichen
  (blackout/blackoutCount pro Session).
- teacher.html: needsHelp energiemanager (>=2 Blackouts oder Tag <4/8);
  Blackout-Spalte + '🔌 neu planen'-Status in Aktuell; Tag-Balken als
  🔌 Blackout kennzeichnen; Run-Karte: eigenes Blackout-Kaertchen +
  '🔌 N Blackouts'-Badge im fertigen Set.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

App/php/api/live.php

@@ -211,6 +211,8 @@ if ($method === 'GET') {
                         'score'       => null,
                         'durationMs'  => 0,
                         'completed'   => null,
+                        'blackout'    => false,
+                        'blackoutCount' => 0,
                         'rowCount'    => 0,
                     ];
                 }
@@ -224,6 +226,9 @@ if ($method === 'GET') {
                 if ($dmv > $currentSess['durationMs']) $currentSess['durationMs'] = $dmv;
                 $cp = $extractCompleted($row);
                 if ($cp !== null) $currentSess['completed'] = $cp;
+                // Blackout-Fehlversuch (Energiemanager) markieren.
+                $rEvt = $row['results'] ? json_decode($row['results'], true) : [];
+                if (($rEvt['event'] ?? '') === 'blackout') { $currentSess['blackout'] = true; $currentSess['blackoutCount']++; }
                 $prevTs = $ts;
             }
             if ($currentSess !== null) $sessions[] = $currentSess;
@@ -276,6 +281,8 @@ if ($method === 'GET') {
                 'stars'       => $s['stars'],
                 'score'       => $s['score'],
                 'completed'   => $s['completed'],
+                'blackout'    => $s['blackout'],
+                'blackoutCount' => $s['blackoutCount'],
                 'success'     => $success,
                 'rowCount'    => $s['rowCount'],
             ];