chore: fix start/stop.sh to use this app's name, not the template's (frontend audit rank 15)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

stop.sh

@@ -6,7 +6,7 @@ cd "$(dirname "$0")"
 PID_FILE=".demo.pid"
 
 if [ ! -f "$PID_FILE" ]; then
-  echo "crema-app-aifirst-template not running (no .demo.pid)"
+  echo "arcadia-admin not running (no .demo.pid)"
   exit 0
 fi
 
@@ -15,9 +15,9 @@ pid="$(cat "$PID_FILE")"
 if [ -n "$pid" ] && kill -0 "$pid" 2>/dev/null; then
   pkill -P "$pid" 2>/dev/null || true
   kill "$pid" 2>/dev/null || true
-  echo "crema-app-aifirst-template stopped (pid $pid)"
+  echo "arcadia-admin stopped (pid $pid)"
 else
-  echo "crema-app-aifirst-template pid $pid not alive, cleaning up"
+  echo "arcadia-admin pid $pid not alive, cleaning up"
 fi
 
 rm -f "$PID_FILE"