install.sh startet Server detached; blaues Herz aus Emoji-Level entfernt

- install.sh startet den Server nach dem Setup im Hintergrund (nohup, PID-/Logfile,
  sauberer Neustart falls schon eine Instanz laeuft)
- server.pid/server.log in .gitignore
- 💙 aus scenes/emoji-chaos/config.json props entfernt

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

scenes/emoji-chaos/config.json

@@ -15,7 +15,7 @@
     "🍕", "🍔", "🍟", "🌭", "🍦", "🍩", "🍪", "🍓", "🍌", "🥑",
     "🍎", "🍊", "🍉", "🍇", "🌮", "🥨", "🧀", "🍿", "🍭", "🧁",
     "⚽", "🏀", "🎾", "🏓", "🎲", "🎸", "🎺", "🎨", "🚀", "⭐",
-    "🌈", "🌸", "🌵", "🍀", "🔥", "💧", "❤️", "💛", "💙", "💜",
+    "🌈", "🌸", "🌵", "🍀", "🔥", "💧", "❤️", "💛", "💜",
     "💚", "🧡", "⚡", "🎈", "🎁", "🎀", "🔔", "💎", "👑", "🌻"
   ]
 }