feat(api, agents, i18n): enhance settlement features and multi-language support

Added new types and API functions for settlement period summaries and credit ledgers, improving the management of agent settlements. Updated the admin console to reflect these changes, enhancing user experience with better navigation and data presentation. Additionally, expanded multi-language support by incorporating new translations in English, Nepali, and Chinese for settlement-related terms, ensuring consistency across the platform.

src/modules/reports/reports-subnav.tsx

@@ -1,9 +1,9 @@
 "use client";
 
-import Link from "next/link";
 import { usePathname } from "next/navigation";
 import { useTranslation } from "react-i18next";
-import { cn } from "@/lib/utils";
+
+import { AdminSubnav, AdminSubnavLink } from "@/components/admin/admin-subnav";
 
 const tabs = [
   { category: "profit", href: "/admin/reports/profit" },
@@ -18,24 +18,15 @@ export function ReportsSubnav(): React.ReactElement {
   const pathname = usePathname();
 
   return (
-    <nav aria-label={t("title")} className="flex w-full flex-wrap items-end gap-1 border-b border-border/60 px-1">
+    <AdminSubnav aria-label={t("title")}>
       {tabs.map((tab) => {
         const active = pathname === tab.href || pathname.startsWith(`${tab.href}/`);
         return (
-          <Link
-            key={tab.href}
-            href={tab.href}
-            className={cn(
-              "border-b-2 px-4 py-3 text-sm font-medium transition-colors",
-              active
-                ? "border-primary text-primary"
-                : "border-transparent text-muted-foreground hover:border-border/80 hover:text-foreground",
-            )}
-          >
+          <AdminSubnavLink key={tab.href} href={tab.href} active={active}>
             {t(`categories.${tab.category}`)}
-          </Link>
+          </AdminSubnavLink>
         );
       })}
-    </nav>
+    </AdminSubnav>
   );
 }