feat: 手动充值、邀请码注册与后台管理增强

新增玩家手动充值全流程（收款方式配置、充值下单/审核、钱包上分），
支持邀请码注册、邀请历史与专属返水率；完善后台代理/玩家管理与响应式操作栏，
并补充前台注册、充值页及多语言错误码。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/admin/src/components/DashboardSubNav.vue

@@ -47,14 +47,14 @@ function isActive(path: string) {
 .dashboard-subnav {
   display: flex;
   align-items: center;
-  gap: 4px;
+  gap: 2px;
   margin-bottom: 16px;
-  padding: 6px;
-  border-radius: 10px;
+  padding: 3px;
+  border-radius: 8px;
   background: rgba(255, 255, 255, 0.03);
   border: 1px solid rgba(255, 255, 255, 0.06);
   flex-shrink: 0;
-  min-height: 48px;
+  min-height: 40px;
   box-sizing: border-box;
 }
 .dashboard-subnav--embedded {
@@ -68,24 +68,24 @@ function isActive(path: string) {
   box-sizing: border-box;
 }
 .dashboard-subnav__item {
-  padding: 0 14px;
-  height: 36px;
+  padding: 0 12px;
+  height: 32px;
   display: inline-flex;
   align-items: center;
   justify-content: center;
   box-sizing: border-box;
-  border-radius: 8px;
+  border-radius: 6px;
   font-size: 13px;
-  font-weight: 600;
-  color: #888;
+  font-weight: 500;
+  color: #737373;
   transition: color 0.15s, background 0.15s;
 }
 .dashboard-subnav__item:hover {
-  color: #ccc;
+  color: #d4d4d4;
   background: rgba(255, 255, 255, 0.04);
 }
 .dashboard-subnav__item--active {
-  color: var(--green-text);
-  background: rgba(0, 200, 83, 0.1);
+  color: #f5f5f5;
+  background: rgba(255, 255, 255, 0.08);
 }
 </style>