added base URL helpers

ui/litellm-dashboard/src/app/(dashboard)/components/Sidebar2.tsx

@@ -44,6 +44,24 @@ interface MenuItem {
   icon?: React.ReactNode;
 }
 
+/** ---- BASE URL HELPERS (shared pattern across files) ---- */
+function normalizeBasePrefix(raw: string | undefined | null): string {
+  const trimmed = (raw ?? "").trim();
+  if (!trimmed) return ""; // no base
+  // strip leading/trailing slashes then rebuild as "/segment/"
+  const core = trimmed.replace(/^\/+/, "").replace(/\/+$/, "");
+  return core ? `/${core}/` : "/";
+}
+const BASE_PREFIX = normalizeBasePrefix(process.env.NEXT_PUBLIC_BASE_URL);
+/** Builds an app-relative path under the configured base prefix. */
+function withBase(path: string): string {
+  // Accepts paths like "/virtual-keys" or "/?page=..." and prefixes with BASE_PREFIX when present.
+  const body = path.startsWith("/") ? path.slice(1) : path;
+  const combined = `${BASE_PREFIX}${body}`;
+  return combined.startsWith("/") ? combined : `/${combined}`;
+}
+/** -------------------------------------------------------- */
+
 const Sidebar2: React.FC<SidebarProps> = ({
   accessToken,
   setPage,
@@ -229,7 +247,7 @@ const Sidebar2: React.FC<SidebarProps> = ({
   const pushToRootWithPage = (page: string, useReplace = false) => {
     const params = new URLSearchParams();
     params.set("page", page);
-    const url = `/?${params.toString()}`;
+    const url = withBase(`/?${params.toString()}`);
     if (useReplace) {
       router.replace(url);
     } else {
@@ -242,8 +260,8 @@ const Sidebar2: React.FC<SidebarProps> = ({
     // Special-case: Virtual Keys target
     if (page === "api-keys") {
       if (refactoredUIFlag) {
-        // Go to the dedicated /virtual-keys page
-        router.push("/virtual-keys");
+        // Go to the dedicated /virtual-keys page (always under base)
+        router.push(withBase("/virtual-keys"));
         return; // do not call setPage here (parity with previous behavior)
       }
       // Legacy behavior
@@ -255,8 +273,8 @@ const Sidebar2: React.FC<SidebarProps> = ({
     // All other pages
     if (refactoredUIFlag) {
       // If currently on /virtual-keys, REPLACE it with /?page=...
-      const onVirtualKeys = pathname?.startsWith("/virtual-keys");
-      pushToRootWithPage(page, onVirtualKeys);
+      const onVirtualKeys = pathname?.startsWith(withBase("/virtual-keys"));
+      pushToRootWithPage(page, !!onVirtualKeys);
     } else {
       pushToRootWithPage(page);
     }

ui/litellm-dashboard/src/app/(dashboard)/layout.tsx

@@ -7,6 +7,21 @@ import Sidebar2 from "@/app/(dashboard)/components/Sidebar2";
 import useAuthorized from "@/app/(dashboard)/hooks/useAuthorized";
 import { useRouter, useSearchParams } from "next/navigation";
 
+/** ---- BASE URL HELPERS ---- */
+function normalizeBasePrefix(raw: string | undefined | null): string {
+  const trimmed = (raw ?? "").trim();
+  if (!trimmed) return "";
+  const core = trimmed.replace(/^\/+/, "").replace(/\/+$/, "");
+  return core ? `/${core}/` : "/";
+}
+const BASE_PREFIX = normalizeBasePrefix(process.env.NEXT_PUBLIC_BASE_URL);
+function withBase(path: string): string {
+  const body = path.startsWith("/") ? path.slice(1) : path;
+  const combined = `${BASE_PREFIX}${body}`;
+  return combined.startsWith("/") ? combined : `/${combined}`;
+}
+/** -------------------------------- */
+
 export default function Layout({ children }: { children: React.ReactNode }) {
   const router = useRouter();
   const searchParams = useSearchParams();
@@ -19,7 +34,7 @@ export default function Layout({ children }: { children: React.ReactNode }) {
   const updatePage = (newPage: string) => {
     const newSearchParams = new URLSearchParams(searchParams);
     newSearchParams.set("page", newPage);
-    router.push(`/?${newSearchParams.toString()}`); // absolute, not relative
+    router.push(withBase(`/?${newSearchParams.toString()}`)); // always under BASE
     setPage(newPage);
   };
 

ui/litellm-dashboard/src/app/page.tsx

@@ -40,6 +40,21 @@ import { UiLoadingSpinner } from "@/components/ui/ui-loading-spinner";
 import { cx } from "@/lib/cva.config";
 import Sidebar2 from "@/app/(dashboard)/components/Sidebar2";
 
+/** ---- BASE URL HELPERS ---- */
+function normalizeBasePrefix(raw: string | undefined | null): string {
+  const trimmed = (raw ?? "").trim();
+  if (!trimmed) return "";
+  const core = trimmed.replace(/^\/+/, "").replace(/\/+$/, "");
+  return core ? `/${core}/` : "/";
+}
+const BASE_PREFIX = normalizeBasePrefix(process.env.NEXT_PUBLIC_BASE_URL);
+function withBase(path: string): string {
+  const body = path.startsWith("/") ? path.slice(1) : path;
+  const combined = `${BASE_PREFIX}${body}`;
+  return combined.startsWith("/") ? combined : `/${combined}`;
+}
+/** -------------------------------- */
+
 function getCookie(name: string) {
   const cookieValue = document.cookie.split("; ").find((row) => row.startsWith(name + "="));
   return cookieValue ? cookieValue.split("=")[1] : null;
@@ -128,11 +143,11 @@ export default function CreateKeyPage() {
     setPage(searchParams.get("page") || "api-keys");
   }, [searchParams]);
 
-  // Custom setPage function that updates URL
+  // Custom setPage function that updates URL (always under BASE)
   const updatePage = (newPage: string) => {
     const newSearchParams = new URLSearchParams(searchParams);
     newSearchParams.set("page", newPage);
-    router.push(`/?${newSearchParams.toString()}`); // absolute, not relative
+    router.push(withBase(`/?${newSearchParams.toString()}`));
     setPage(newPage);
   };
 
@@ -160,6 +175,7 @@ export default function CreateKeyPage() {
 
   useEffect(() => {
     if (redirectToLogin) {
+      // This is an external auth route (kept as-is, not app navigation).
       window.location.href = (proxyBaseUrl || "") + "/sso/key/generate";
     }
   }, [redirectToLogin]);