feat(deploy+bench+ops): DGX vm scripts, Windows RDP launcher, bench cases, agent_chat enable script

deploy/dgx/vm_stop.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+# Persistent VM stop — ACPI poweroff via QEMU monitor, then SIGTERM, then SIGKILL
+# Kill swtpm after QEMU exits. Cleanup PID/sockets.
+
+VMROOT=/home/aivanov/quickemu-win11-arm-lea
+MONITOR_SOCKET="$VMROOT/windows-11-arm-lea-monitor.socket"
+PIDFILE="$VMROOT/windows-11-arm-lea.pid"
+
+# Step 1: Send ACPI poweroff via QEMU monitor
+if [ -S "$MONITOR_SOCKET" ]; then
+    echo "system_powerdown" | socat - UNIX-CONNECT:"$MONITOR_SOCKET" - > /dev/null 2>&1
+    echo "ACPI poweroff sent, waiting 30s..."
+    for i in $(seq 1 30); do
+        if [ ! -f "$PIDFILE" ] || ! ps -p "$(cat "$PIDFILE" 2>/dev/null)" > /dev/null 2>&1; then
+            echo "QEMU exited gracefully"
+            exit 0
+        fi
+        sleep 1
+    done
+fi
+
+# Step 2: SIGTERM (10s more)
+QEMU_PID=$(cat "$PIDFILE" 2>/dev/null)
+if [ -n "$QEMU_PID" ] && ps -p "$QEMU_PID" > /dev/null 2>&1; then
+    echo "Still running, sending SIGTERM..."
+    kill "$QEMU_PID" 2>/dev/null
+    for i in $(seq 1 10); do
+        if ! ps -p "$QEMU_PID" > /dev/null 2>&1; then
+            echo "QEMU exited after SIGTERM"
+            break
+        fi
+        sleep 1
+    done
+fi
+
+# Step 3: SIGKILL
+QEMU_PID=$(cat "$PIDFILE" 2>/dev/null)
+if [ -n "$QEMU_PID" ] && ps -p "$QEMU_PID" > /dev/null 2>&1; then
+    echo "Still running, SIGKILL..."
+    kill -9 "$QEMU_PID" 2>/dev/null
+    sleep 2
+fi
+
+# Step 4: Kill swtpm
+pkill -f "swtpm.*windows-11-arm-lea" 2>/dev/null
+sleep 2
+
+# Step 5: Cleanup
+rm -f "$PIDFILE" "$VMROOT"/*.sock "$VMROOT"/*.socket 2>/dev/null
+echo "VM stop complete"