fix(activity): an old audit/log link opens its tab, times read relative, one name for admin actions

Seen in the browser, not in the page's own tests: the navigation provider rewrites a retired page id
to `activity` before the page's chunk reads the URL, so `?page=audit` landed on the Runs tab. The
retired-page map now carries the params that open the successor's part (`at`), and the provider
writes them as it rewrites the page — on load and on Back alike.

A list time is relative with the exact second on hover (the DESIGN copy rule); a run moved over from
the audit log, whose start and end are one instant, shows no length instead of an invented "1 sec".
The audit log is called "admin actions" everywhere it is named (the clear button and its confirm, the
Configuration group, the cleanup job, which also prunes the run history its description left out).

frontend/src/components/AdminLogs.dom.test.tsx

@@ -2,10 +2,10 @@
 //
 // The activity page's server-log tab, rendered through the page (which owns the shared filters and
 // the pivots). A request or run id narrows the list to that request or run (and says so, in the
-// filter row and the URL), and Back returns to the view the pivot was made from; an old link to the
-// retired log page opens this tab; the account in use stays pickable; "Live" watches the newest page
-// only, and stops on a failed read instead of re-raising it; a failed read is an error, not an empty
-// log; Copy takes every loaded line, oldest first.
+// filter row and the URL), and Back returns to the view the pivot was made from; the account in use
+// stays pickable; "Live" watches the newest page only, and stops on a failed read instead of
+// re-raising it; a failed read is an error, not an empty log; Copy takes every loaded line, oldest
+// first.
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { act, cleanup, fireEvent, render, screen, waitFor, within } from "@testing-library/react";
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
@@ -199,20 +199,6 @@ describe("AdminLogs", () => {
     expect(new URLSearchParams(window.location.search).get("lrun")).toBe("77");
   });
 
-  it("an old link to the server log page opens this tab with its filter", async () => {
-    window.history.replaceState(null, "", "/?page=logs&lreq=req-00000009");
-    logsMock.mockResolvedValue({ items: [], accounts: {}, next_cursor: null });
-    renderConsole();
-
-    await waitFor(() =>
-      expect(logsMock).toHaveBeenCalledWith(
-        expect.objectContaining({ request_id: "req-00000009" }),
-        null,
-      ),
-    );
-    expect(new URLSearchParams(window.location.search).get("page")).toBe("activity");
-  });
-
   it("keeps the account in use offered when the account list does not have it", async () => {
     window.history.replaceState(null, "", "/?page=activity&at=logs&au=7");
     logsMock.mockResolvedValue({ items: [], accounts: {}, next_cursor: null });