feat(admin): 绑定订阅后回跳提示增强（attached_subscription + 滚动）

app/Http/Controllers/Admin/PlatformOrderController.php

@@ -664,6 +664,11 @@ class PlatformOrderController extends Controller
         ]);
 
         $safeBack = \App\Support\BackUrl::sanitizeForLinks((string) ($data['back'] ?? ''));
+        // 进一步稳妥：强制回跳到订单详情自身（避免外部页面传错 back，导致运营迷路）
+        $fallbackBack = '/admin/platform-orders/' . $order->id;
+        if ($safeBack === '') {
+            $safeBack = $fallbackBack;
+        }
 
         if ((string) ($order->order_type ?? '') !== 'renewal') {
             return ($safeBack !== '' ? redirect($safeBack) : redirect()->back())
@@ -710,7 +715,15 @@ class PlatformOrderController extends Controller
 
         $order->save();
 
-        return ($safeBack !== '' ? redirect($safeBack) : redirect()->back())
+        // 绑定成功后追加一个轻量 query，用于前端 JS 做滚动/高亮提示（渐进增强）
+        $redirectUrl = $safeBack;
+        if (str_contains($redirectUrl, '?')) {
+            $redirectUrl .= '&attached_subscription=1';
+        } else {
+            $redirectUrl .= '?attached_subscription=1';
+        }
+
+        return redirect($redirectUrl)
             ->with('success', '已绑定订阅：' . (string) ($sub->subscription_no ?? $sub->id));
     }