diff --git a/app/Http/Controllers/Admin/BasicSettings/MachineSettingController.php b/app/Http/Controllers/Admin/BasicSettings/MachineSettingController.php
index 5e2caab..1c68900 100644
--- a/app/Http/Controllers/Admin/BasicSettings/MachineSettingController.php
+++ b/app/Http/Controllers/Admin/BasicSettings/MachineSettingController.php
@@ -28,7 +28,12 @@ class MachineSettingController extends AdminController
         $tab = $request->input('tab', 'machines');
         $per_page = $request->input('per_page', 10);
         $search = $request->input('search');
-        $isAjax = $request->boolean('_ajax');
+        // 只有「真正的 XHR 請求」才回無 layout 的裸片段。
+        // 否則使用者若直接導航到帶 _ajax 的分頁連結（AJAX 重繪後 withQueryString 會把 _ajax 烙進 href），
+        // 會拿到沒套 CSS 的裸片段 → SVG 圖示放大/變形。_ajax 只由前端 searchInTab 產生且必帶 XHR 標頭。
+        $isAjax = $request->ajax() && $request->boolean('_ajax');
+        // 移除 _ajax，避免它經 withQueryString() 洩漏進分頁連結網址
+        $request->query->remove('_ajax');
         $currentUser = auth()->user();
         $companyId = trim((string) $request->input('company_id', ''));