diff --git a/monitor.php b/monitor.php
index 816becc..4add473 100644
--- a/monitor.php
+++ b/monitor.php
@@ -2407,7 +2407,7 @@ $carMonitorSession = car_monitor_launcher_session();
 
     let currentLang = 'ko';
     const DEFAULT_USAGE_REFRESH_INTERVAL_SEC = 10;
-    const CAR_MONITOR_SESSION = <?php echo json_encode($carMonitorSession, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES); ?>;
+    let CAR_MONITOR_SESSION = <?php echo json_encode($carMonitorSession, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES); ?>;
 
     const CMD_MAP = {
         se: { label: 'cmdStatus', icon: 'fa-search', bg: 'var(--box-bg-blue)', color: 'var(--accent-blue)' },
@@ -2924,11 +2924,13 @@ $carMonitorSession = car_monitor_launcher_session();
         }
     }
 
-    function initCalibrationSettings() {
+    function showCalibrationSettings() {
         const btn = document.getElementById('settings-btn');
         if (!btn || !CAR_MONITOR_SESSION?.admin) return;
 
         btn.classList.remove('d-none');
+        if (btn.dataset.ready === '1') return;
+        btn.dataset.ready = '1';
         btn.addEventListener('click', openCalibrationModal);
 
         document.getElementById('calibration-close-btn')?.addEventListener('click', closeCalibrationModal);
@@ -2940,6 +2942,25 @@ $carMonitorSession = car_monitor_launcher_session();
         });
     }
 
+    async function initCalibrationSettings() {
+        if (CAR_MONITOR_SESSION?.admin) {
+            showCalibrationSettings();
+            return;
+        }
+
+        try {
+            const res = await fetch('https://chaegeon.com/custom/launcher/api.php?adminSession=1', {
+                credentials: 'include',
+                cache: 'no-store',
+            });
+            const data = await res.json();
+            if (res.ok && data?.authenticated && data?.admin) {
+                CAR_MONITOR_SESSION = { ...CAR_MONITOR_SESSION, authenticated: true, admin: true };
+                showCalibrationSettings();
+            }
+        } catch (_) {}
+    }
+
     function openCalibrationModal() {
         const overlay = document.getElementById('calibration-overlay');
         if (!overlay) return;