style(admin platform orders index): fix clear lead buttons class

resources/views/admin/platform_orders/index.blade.php

@@ -56,7 +56,7 @@
         <div class="mt-10 actions">
             <span class="badge">当前线索：#{{ $incomingLeadId }}</span>
             <span class="muted muted-xs">（已按 lead_id 过滤订单集合）</span>
-            <a class="btn-secondary btn-sm" href="{!! $clearLeadUrl !!}">清除线索筛选</a>
+            <a class="btn btn-secondary btn-sm" href="{!! $clearLeadUrl !!}">清除线索筛选</a>
         </div>
     @endif
 
@@ -104,7 +104,7 @@
         @if($incomingLeadId > 0)
             <div class="muted">
                 当前锁定线索：#{{ $incomingLeadId }}
-                <a class="btn-secondary btn-sm" href="{!! $clearLeadUrl !!}">清除</a>
+                <a class="btn btn-secondary btn-sm" href="{!! $clearLeadUrl !!}">清除</a>
             </div>
         @endif
     </div>