feat(web): add dashboard page with KPIs, charts, and alerts

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/components/providers/query-provider.tsx

@@ -0,0 +1,22 @@
+'use client';
+
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import { useState } from 'react';
+
+export function QueryProvider({ children }: { children: React.ReactNode }) {
+  const [queryClient] = useState(
+    () =>
+      new QueryClient({
+        defaultOptions: {
+          queries: {
+            staleTime: 60 * 1000,
+            refetchOnWindowFocus: false,
+          },
+        },
+      })
+  );
+
+  return (
+    <QueryClientProvider client={queryClient}>{children}</QueryClientProvider>
+  );
+}