feat(i18n, agents): enhance multi-language support with new agent-related translations

Added new translations for agent management features in English, Nepali, and Chinese, including terms related to sub-agents, player management, and validation messages. This update improves the user experience by ensuring consistent terminology across different languages in the agents console.

src/i18n/locales/zh/agents.json

@@ -37,6 +37,11 @@
   "loadFailed": "加载代理列表失败",
   "siteLabel": "站点",
   "createChild": "添加下级代理",
+  "viewDownline": "查看下级代理和玩家",
+  "downlineDialogTitle": "{{name}} — 下级代理与玩家",
+  "downlineAgentsSection": "下级代理",
+  "downlinePlayersSection": "直属玩家",
+  "downlineNoAgents": "暂无下级代理",
   "editNode": "编辑代理",
   "deleteNode": "删除代理",
   "deleteNodeConfirm": "删除后不可恢复，请确认该代理无下级、无账号、无角色绑定。",
@@ -59,6 +64,12 @@
   "deleteSuccess": "已删除代理 {{name}}",
   "saveFailed": "保存失败",
   "codeRequired": "请填写代理名称和登录名",
+  "nameRequired": "请填写代理名称",
+  "usernameRequired": "请填写登录名",
+  "passwordRequired": "请填写密码",
+  "passwordMinLength": "密码至少 8 位",
+  "bindAccountPasswordRequired": "该代理尚未绑定登录账号，请填写初始密码以创建账号",
+  "bindAccountHint": "该代理尚无登录账号，保存时将自动创建并绑定。",
   "modelGuide": "代理层负责数据范围（Scope）与授权上限（Ceiling），账号权限请通过角色分配。",
   "pageGuide": "这里统一管理代理树、代理角色、代理账号与下放上限。平台账号和平台角色请到各自的平台治理页面维护。",
   "summary": {
@@ -83,7 +94,17 @@
     "canCreateChildAgent": "允许创建下级代理",
     "cycleDaily": "日结",
     "cycleWeekly": "周结",
-    "cycleMonthly": "月结"
+    "cycleMonthly": "月结",
+    "loading": "正在加载占成与授信…",
+    "loadFailed": "加载占成与授信失败，请关闭后重试",
+    "loadingBlocked": "占成与授信尚未加载完成，请稍候再保存",
+    "validation": {
+      "shareRange": "占成比例须在 0–100 之间",
+      "creditInvalid": "授信额度不能为负数",
+      "rebateLimitRange": "回水上限须在 0–1 之间（如 0.005 表示 0.5%）",
+      "defaultRebateRange": "默认玩家回水须在 0–1 之间",
+      "defaultExceedsLimit": "默认玩家回水不能超过回水上限"
+    }
   },
   "settlementBills": {
     "title": "代理账单",