refactor(ui): adopt shared tab-routing helpers + anchor TabRouteBar in Logs

Replace the page's hand-written tabRoutes.ts and layout routing engine
with createTabRoutes + useTabRouting + the shared <TabRouteBar>, keeping
the credentials loading-spinner guard inline. The per-page tabRoutes.test.ts
is dropped in favor of the central factory test.

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

@@ -0,0 +1,56 @@
+/* @vitest-environment jsdom */
+import { render } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const { mockPush } = vi.hoisted(() => ({ mockPush: vi.fn() }));
+vi.mock("next/navigation", () => ({ useRouter: () => ({ push: mockPush }) }));
+vi.mock("@/components/networking", () => ({ serverRootPath: "" }));
+
+import { createTabRoutes } from "@/utils/tabRoutes";
+import { TabRouteBar } from "./TabRouteBar";
+
+const routes = createTabRoutes("caching", ["health", "settings"] as const);
+const TABS = [
+  { key: "analytics", label: "Cache Analytics" },
+  { key: "health", label: "Cache Health" },
+  { key: "settings", label: "Cache Settings" },
+];
+
+const renderBar = (activeKey = "analytics") =>
+  render(<TabRouteBar routes={routes} baseTabKey="analytics" activeKey={activeKey} tabs={TABS} />);
+
+describe("TabRouteBar", () => {
+  beforeEach(() => {
+    mockPush.mockClear();
+  });
+
+  it("renders each tab as an anchor with its trailing-slash href (base tab maps to the root)", () => {
+    const { getByRole } = renderBar();
+    expect(getByRole("tab", { name: "Cache Analytics" })).toHaveAttribute("href", "/ui/caching/");
+    expect(getByRole("tab", { name: "Cache Health" })).toHaveAttribute("href", "/ui/caching/health/");
+    expect(getByRole("tab", { name: "Cache Settings" })).toHaveAttribute("href", "/ui/caching/settings/");
+  });
+
+  it("marks the active tab selected from activeKey", () => {
+    const { getByRole } = renderBar("health");
+    expect(getByRole("tab", { name: "Cache Health" })).toHaveAttribute("aria-selected", "true");
+    expect(getByRole("tab", { name: "Cache Analytics" })).toHaveAttribute("aria-selected", "false");
+  });
+
+  it("soft-navigates on a plain left click (preventing the full-page anchor load)", async () => {
+    const user = userEvent.setup();
+    const { getByRole } = renderBar();
+    await user.click(getByRole("tab", { name: "Cache Health" }));
+    expect(mockPush).toHaveBeenCalledWith("/ui/caching/health/");
+  });
+
+  it("lets the browser handle a modifier-click so open-in-new-tab works", async () => {
+    const user = userEvent.setup();
+    const { getByRole } = renderBar();
+    await user.keyboard("[ControlLeft>]");
+    await user.click(getByRole("tab", { name: "Cache Health" }));
+    await user.keyboard("[/ControlLeft]");
+    expect(mockPush).not.toHaveBeenCalled();
+  });
+});

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

@@ -0,0 +1,48 @@
+"use client";
+
+import type { MouseEvent } from "react";
+import { useRouter } from "next/navigation";
+import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";
+import type { TabRoutes } from "@/utils/tabRoutes";
+
+export interface TabRouteItem {
+  key: string;
+  label: string;
+}
+
+interface TabRouteBarProps {
+  routes: Pick<TabRoutes<string>, "tabHref">;
+  baseTabKey: string;
+  activeKey: string;
+  tabs: readonly TabRouteItem[];
+  className?: string;
+}
+
+export function TabRouteBar({ routes, baseTabKey, activeKey, tabs, className }: TabRouteBarProps) {
+  const router = useRouter();
+
+  const navigate = (href: string) => (event: MouseEvent<HTMLAnchorElement>) => {
+    const commandModifier = event.metaKey || event.ctrlKey;
+    const otherModifier = event.shiftKey || event.altKey;
+    if (commandModifier || otherModifier) {
+      return;
+    }
+    event.preventDefault();
+    router.push(href);
+  };
+
+  return (
+    <Tabs value={activeKey} className={className}>
+      <TabsList variant="line">
+        {tabs.map(({ key, label }) => {
+          const href = routes.tabHref(key === baseTabKey ? "" : key);
+          return (
+            <TabsTrigger key={key} value={key} render={<a href={href} onClick={navigate(href)} />}>
+              {label}
+            </TabsTrigger>
+          );
+        })}
+      </TabsList>
+    </Tabs>
+  );
+}

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

@@ -39,7 +39,7 @@ describe("LogsLayout", () => {
     };
   });
 
-  it("renders the four log tabs and the active tab's page content", () => {
+  it("renders the four tabs and the active tab's page content", () => {
     const { getByRole, getByTestId } = renderLayout();
     for (const name of ["Request Logs", "Audit Logs", "Deleted Keys", "Deleted Teams"]) {
       expect(getByRole("tab", { name })).toBeInTheDocument();
@@ -50,24 +50,13 @@ describe("LogsLayout", () => {
   it("marks the base route's Request Logs tab active", () => {
     const { getByRole } = renderLayout();
     expect(getByRole("tab", { name: "Request Logs" })).toHaveAttribute("aria-selected", "true");
-    expect(getByRole("tab", { name: "Audit Logs" })).toHaveAttribute("aria-selected", "false");
   });
 
-  it("navigates to a tab's path when its tab is clicked", async () => {
+  it("derives the active tab from a nested pathname", () => {
+    navState.pathname = "/ui/logs/audit";
     const { getByRole } = renderLayout();
-    await act(async () => {
-      getByRole("tab", { name: "Audit Logs" }).click();
-    });
-    expect(mockPush).toHaveBeenCalledWith(expect.stringMatching(/\/logs\/audit\/$/));
-  });
-
-  it("routes the base tab back to the logs root (no slug)", async () => {
-    navState.pathname = "/logs/audit";
-    const { getByRole } = renderLayout();
-    await act(async () => {
-      getByRole("tab", { name: "Request Logs" }).click();
-    });
-    expect(mockPush).toHaveBeenCalledWith(expect.stringMatching(/\/logs\/$/));
+    expect(getByRole("tab", { name: "Audit Logs" })).toHaveAttribute("aria-selected", "true");
+    expect(getByRole("tab", { name: "Request Logs" })).toHaveAttribute("aria-selected", "false");
   });
 
   it("redirects to the base logs path when the tab slug is unknown", async () => {

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

@@ -1,38 +1,28 @@
 "use client";
 
 import type { ReactNode } from "react";
-import { useEffect } from "react";
-import { usePathname, useRouter } from "next/navigation";
-import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { AntDLoadingSpinner } from "@/components/ui/AntDLoadingSpinner";
 import useAuthorized from "@/app/(dashboard)/hooks/useAuthorized";
-import { logsTabHref, slugFromPathname, type LogsTabSlug } from "@/app/(dashboard)/logs/tabRoutes";
+import { logsRoutes } from "@/app/(dashboard)/logs/tabRoutes";
+import { useTabRouting } from "@/app/(dashboard)/hooks/useTabRouting";
+import { TabRouteBar } from "@/app/(dashboard)/components/TabRouteBar";
 
 const BASE_TAB_KEY = "request-logs";
 
-const ORDERED_KEYS: Array<"" | LogsTabSlug> = ["", "audit", "deleted-keys", "deleted-teams"];
-
-const TAB_LABELS: Record<"" | LogsTabSlug, string> = {
-  "": "Request Logs",
-  audit: "Audit Logs",
-  "deleted-keys": "Deleted Keys",
-  "deleted-teams": "Deleted Teams",
-};
+const TABS = [
+  { key: BASE_TAB_KEY, label: "Request Logs" },
+  { key: "audit", label: "Audit Logs" },
+  { key: "deleted-keys", label: "Deleted Keys" },
+  { key: "deleted-teams", label: "Deleted Teams" },
+] as const;
 
 export default function LogsLayout({ children }: { children: ReactNode }) {
   const { accessToken, token, userRole, userId } = useAuthorized();
-  const pathname = usePathname();
-  const router = useRouter();
-
-  const activeSlug = slugFromPathname(pathname);
-  const isKnownSlug = ORDERED_KEYS.some((slug) => slug === activeSlug);
-  const activeKey = isKnownSlug ? activeSlug || BASE_TAB_KEY : BASE_TAB_KEY;
-
-  useEffect(() => {
-    if (activeSlug !== "" && !isKnownSlug) {
-      window.location.replace(logsTabHref(""));
-    }
-  }, [activeSlug, isKnownSlug]);
+  const { activeKey } = useTabRouting({
+    routes: logsRoutes,
+    baseTabKey: BASE_TAB_KEY,
+    visibleKeys: logsRoutes.slugs,
+  });
 
   const hasCredentials = Boolean(accessToken && token);
   const hasIdentity = Boolean(userRole && userId);
@@ -47,16 +37,7 @@ export default function LogsLayout({ children }: { children: ReactNode }) {
 
   return (
     <div className="w-full p-6 overflow-x-hidden box-border">
-      <Tabs value={activeKey} onValueChange={(key) => router.push(logsTabHref(key === BASE_TAB_KEY ? "" : key))}>
-        <TabsList variant="line">
-          {ORDERED_KEYS.map((slug) => (
-            <TabsTrigger key={slug || BASE_TAB_KEY} value={slug || BASE_TAB_KEY}>
-              {TAB_LABELS[slug]}
-            </TabsTrigger>
-          ))}
-        </TabsList>
-      </Tabs>
-
+      <TabRouteBar routes={logsRoutes} baseTabKey={BASE_TAB_KEY} activeKey={activeKey} tabs={TABS} />
       <div className="mt-4">{children}</div>
     </div>
   );

ui/litellm-dashboard/src/app/(dashboard)/logs/tabRoutes.test.ts

@@ -1,38 +0,0 @@
-/* @vitest-environment jsdom */
-import { describe, expect, it, vi } from "vitest";
-
-vi.mock("@/components/networking", () => ({ serverRootPath: "" }));
-
-import { LOGS_TAB_SLUGS, logsTabHref, slugFromPathname } from "./tabRoutes";
-
-describe("slugFromPathname", () => {
-  it("returns empty string for the base path with or without a trailing slash", () => {
-    expect(slugFromPathname("/logs")).toBe("");
-    expect(slugFromPathname("/logs/")).toBe("");
-  });
-
-  it("extracts the tab slug from dev and proxy-mounted (/ui) paths", () => {
-    expect(slugFromPathname("/logs/audit")).toBe("audit");
-    expect(slugFromPathname("/ui/logs/deleted-teams/")).toBe("deleted-teams");
-  });
-
-  it("returns the raw segment for an unknown tab so the layout can redirect to base", () => {
-    expect(slugFromPathname("/ui/logs/bogus")).toBe("bogus");
-  });
-
-  it("returns empty string when the logs base segment is not in the path", () => {
-    expect(slugFromPathname("/teams")).toBe("");
-  });
-});
-
-describe("logsTabHref", () => {
-  it("builds the trailing-slash base href for the empty slug", () => {
-    expect(logsTabHref("")).toBe("/ui/logs/");
-  });
-
-  it("builds a trailing-slash href for every tab slug (required by static export)", () => {
-    for (const slug of LOGS_TAB_SLUGS) {
-      expect(logsTabHref(slug)).toBe(`/ui/logs/${slug}/`);
-    }
-  });
-});

ui/litellm-dashboard/src/app/(dashboard)/logs/tabRoutes.ts

@@ -1,21 +1,5 @@
-import { migratedHref } from "@/utils/migratedPages";
+import { createTabRoutes } from "@/utils/tabRoutes";
 
-export const LOGS_BASE_SEGMENT = "logs";
+export const logsRoutes = createTabRoutes("logs", ["audit", "deleted-keys", "deleted-teams"] as const);
 
-export const LOGS_TAB_SLUGS = ["audit", "deleted-keys", "deleted-teams"] as const;
-
-export type LogsTabSlug = (typeof LOGS_TAB_SLUGS)[number];
-
-export function logsTabHref(slug: string): string {
-  const base = migratedHref(LOGS_BASE_SEGMENT);
-  return slug ? `${base}/${slug}/` : `${base}/`;
-}
-
-export function slugFromPathname(pathname: string): string {
-  const parts = pathname.split("/").filter(Boolean);
-  const idx = parts.indexOf(LOGS_BASE_SEGMENT);
-  if (idx === -1) {
-    return "";
-  }
-  return parts[idx + 1] ?? "";
-}
+export type LogsTabSlug = (typeof logsRoutes.slugs)[number];