feat(i18n, config): enhance agent management localization and add settings/currencies hub cards

Added new agent-related translation keys across English, Nepali, and Chinese including agentCode, agentName, loginUsername, and detailTabs. Enhanced agent console hints for child creation permissions and line root profile read-only states. Added validation error messages for share/rebate parent limits and username charset validation. Introduced common status labels (enabled/disabled) and yes/no/none text

src/modules/config/config-hub-screen.tsx

@@ -6,7 +6,7 @@ import { ChevronRight } from "lucide-react";
 
 import { ModuleScaffold } from "@/components/admin/module-scaffold";
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
-import { PRD_INTEGRATION_ACCESS_ANY } from "@/lib/admin-prd";
+import { PRD_INTEGRATION_ACCESS_ANY, PRD_SETTINGS_ACCESS_ANY, PRD_CURRENCY_MANAGE } from "@/lib/admin-prd";
 import { useAdminProfile } from "@/stores/admin-session";
 import { adminHasAnyPermission } from "@/lib/admin-permissions";
 
@@ -48,6 +48,18 @@ const HUB_CARDS: HubCard[] = [
     descKey: "hub.integrationDesc",
     requiredAny: PRD_INTEGRATION_ACCESS_ANY,
   },
+  {
+    href: "/admin/settings",
+    titleKey: "hub.settingsTitle",
+    descKey: "hub.settingsDesc",
+    requiredAny: PRD_SETTINGS_ACCESS_ANY,
+  },
+  {
+    href: "/admin/currencies",
+    titleKey: "hub.currenciesTitle",
+    descKey: "hub.currenciesDesc",
+    requiredAny: [PRD_CURRENCY_MANAGE],
+  },
 ];
 
 export function ConfigHubScreen() {