MRBS 1.12.2 等保2.0二级整改完整提交

包含：登录失败锁定、90天密码有效期、30分钟会话超时、
强制改密、登录审计日志、屏幕水印、企业背景图、
备案信息固定底部、favicon、JS空集合保护、
会话过期体验优化（403 JSON）、display_errors 关闭、
固定 key 根治 Integrity check failed 等全部改动

注意：config.inc.php/.htaccess/.user.ini 含敏感信息，
通过 .gitignore 排除，勿推送到公开仓库。

jquery/datatables/language/cy.json

@@ -0,0 +1,22 @@
+{
+    "emptyTable": "Dim data ar gael yn y tabl",
+    "info": "Dangos _START_ i _END_ o _TOTAL_ cofnod",
+    "infoEmpty": "Dangos 0 i 0 o 0 cofnod",
+    "infoFiltered": "(wedi hidlo o gyfanswm o _MAX_ cofnod)",
+    "infoThousands": ",",
+    "lengthMenu": "Dangos _MENU_ cofnod",
+    "loadingRecords": "Wrthi'n llwytho...",
+    "processing": "Wrthi'n prosesu...",
+    "search": "Chwilio:",
+    "zeroRecords": "Heb ddod o hyd i gofnodion sy'n cyfateb",
+    "paginate": {
+        "first": "Cyntaf",
+        "last": "Olaf",
+        "next": "Nesaf",
+        "previous": "Blaenorol"
+    },
+    "aria": {
+        "sortAscending": ": rhoi ar waith i drefnu colofnau o'r lleiaf i'r mwyaf",
+        "sortDescending": ": rhoi ar waith i drefnu colofnau o'r mwyaf i'r lleiaf"
+    }
+}