feat: Refactor admin UI pages to support embedded mode and improve navigation

- Updated PlayerLogs, Players, Reports, Rooms, Settings, SignupCodes, and other pages to accept an optional `embedded` prop for better integration in various contexts.
- Introduced a new Activity page consolidating audit logs and player request logs with tab navigation.
- Added Content page for community board and loading tips with tab navigation.
- Created Moderation page to unify player directory, bans, and reports under a single interface.
- Implemented SettingsHome page to manage server settings and signup codes with tab navigation.
- Enhanced the Join page to include password creation for new accounts.
- Added global friends feature in Settings to allow all accounts to be friends without database entries.
- Introduced RelationshipQueries service to manage effective friend resolution based on global friends toggle.
- Added WireDates for consistent date handling in serialized data.
- Created reusable Tabs component for consistent tab navigation across various pages.

DorkNet.Server/admin-ui/src/pages/Activity.tsx

@@ -0,0 +1,25 @@
+import { Audit } from './Audit';
+import { PlayerLogs } from './PlayerLogs';
+import { PageHeader } from '../components/PageHeader';
+import { Tabs, useTabParam } from '../components/Tabs';
+
+// Both log views in one place: the admin audit trail and the per-player
+// HTTP request ring buffer. Old /audit and /logs routes redirect here.
+export function Activity() {
+  const [tab, setTab] = useTabParam<'audit' | 'logs'>('audit', ['audit', 'logs']);
+  return (
+    <div>
+      <PageHeader title="Activity" blurb="Admin audit trail and per-player HTTP request logs." />
+      <Tabs
+        tabs={[
+          { key: 'audit', label: 'Audit log' },
+          { key: 'logs', label: 'Player requests' },
+        ]}
+        active={tab}
+        onChange={setTab}
+      />
+      {tab === 'audit' && <Audit embedded />}
+      {tab === 'logs' && <PlayerLogs embedded />}
+    </div>
+  );
+}