refactor(admin): drop status strip from dashboard; full-bleed usage tab

- admin home is tournament section + tools list only
- usage route matches sibling tabs (fullWidth, no shell padding); screen
  pads its own content so the tab bar stays flush

src/features/admin/components/dashboard/index.tsx

@@ -1,24 +1,10 @@
 import { Suspense } from "react";
-import { Group, SimpleGrid, Skeleton, Stack } from "@mantine/core";
+import { SimpleGrid, Skeleton } from "@mantine/core";
 import QuietBoundary from "./quiet-boundary";
 import SectionBox from "./section-box";
-import StatusStrip from "./status-strip";
 import TournamentSection from "./tournament-section";
 import ToolsList from "./tools-list";
 
-const StripSkeleton = () => (
-  <SectionBox>
-    <Group grow>
-      {[0, 1, 2].map((i) => (
-        <Stack key={i} gap={4} align="center">
-          <Skeleton height={22} width={32} radius="sm" />
-          <Skeleton height={10} width={56} radius="sm" />
-        </Stack>
-      ))}
-    </Group>
-  </SectionBox>
-);
-
 const TournamentSkeleton = () => (
   <SectionBox>
     <Skeleton height={24} width={180} radius="sm" />
@@ -32,13 +18,6 @@ const TournamentSkeleton = () => (
 
 export const AdminDashboard = () => (
   <>
-    <QuietBoundary>
-      <Suspense fallback={<StripSkeleton />}>
-        <SectionBox>
-          <StatusStrip />
-        </SectionBox>
-      </Suspense>
-    </QuietBoundary>
     <QuietBoundary>
       <Suspense fallback={<TournamentSkeleton />}>
         <TournamentSection />