improve approval notify + add approval_status filter

lang/chs/lang_functions.php

@@ -322,6 +322,7 @@ $lang_functions = array
     'text_complains' => '有%s%u个待处理的申诉%s',
     'text_contactstaff' => '联系管理组',
     'full_site_promotion_in_effect' => '全站 [%s] 生效中！',
+    'text_torrent_to_approval' => '有 %s%u 个待审核的种子%s',
 );
 
 ?>

lang/chs/lang_torrents.php

@@ -58,6 +58,7 @@ $lang_torrents = array
 	'text_tv' => "电视:",
 	'text_music' => "音乐:",
 	'text_software' => "软件:",
+    'text_approval_status' => '审核状态：',
 );
 
 ?>