diff --git a/app/Http/Controllers/Site/PriceStreamController.php b/app/Http/Controllers/Site/PriceStreamController.php
index bea6706..4c6c7ed 100644
--- a/app/Http/Controllers/Site/PriceStreamController.php
+++ b/app/Http/Controllers/Site/PriceStreamController.php
@@ -4,6 +4,7 @@ namespace App\Http\Controllers\Site;
 
 use App\Http\Controllers\Controller;
 use App\Services\AssetSummaryService;
+use App\Services\CustomerPresenceService;
 use App\Services\LivePriceCacheService;
 use App\Services\PriceBroadcastService;
 use App\Services\PriceStreamService;
@@ -45,6 +46,11 @@ class PriceStreamController extends Controller
                 @flush();
             };
 
+            $presence = app(CustomerPresenceService::class);
+            if ($customerId > 0) {
+                $presence->touch($customerId, true);
+            }
+
             $cache = app(LivePriceCacheService::class);
             $last = $cache->get() ?? $cache->buildFromDatabase();
             if (is_array($last) && $last !== []) {
@@ -91,6 +97,9 @@ class PriceStreamController extends Controller
                 // هر ۵ ثانیه — LiteSpeed/پروکسی اتصال بیکار را نمی‌بندد
                 if ($heartbeatTicks >= 10) {
                     $send('ping', ['ts' => time()]);
+                    if ($customerId > 0) {
+                        $presence->touch($customerId);
+                    }
                     $heartbeatTicks = 0;
                 }
 
diff --git a/app/Services/CustomerPresenceService.php b/app/Services/CustomerPresenceService.php
new file mode 100644
index 0000000..315b133
--- /dev/null
+++ b/app/Services/CustomerPresenceService.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\Customer;
+use Illuminate\Support\Facades\Cache;
+
+/**
+ * Presence از اتصال SSE قیمت: تا وقتی استریم مشتری باز است last_seen_at لمس می‌شود.
+ * ادمین با آستانهٔ زمانی (مثلاً ۲ دقیقه) آنلاین بودن را می‌فهمد.
+ */
+class CustomerPresenceService
+{
+    public const TOUCH_THROTTLE_SECONDS = 30;
+
+    /** آستانهٔ آنلاین بودن در کلاینت ادمین هم باید هم‌تراز باشد (~۲ دقیقه). */
+    public const ONLINE_THRESHOLD_SECONDS = 120;
+
+    public function touch(int $customerId, bool $force = false): void
+    {
+        if ($customerId <= 0) {
+            return;
+        }
+
+        $key = 'customer_sse_presence:'.$customerId;
+        if (! $force && Cache::has($key)) {
+            return;
+        }
+
+        Cache::put($key, 1, self::TOUCH_THROTTLE_SECONDS);
+
+        try {
+            Customer::query()
+                ->where('id', $customerId)
+                ->update(['last_seen_at' => now()]);
+        } catch (\Throwable $e) {
+            // استریم قیمت نباید به‌خاطر presence بمیرد
+            report($e);
+        }
+    }
+}