feat: Implement Cronitor health monitor

src/App.tsx

@@ -9,6 +9,7 @@ import * as Cronitor from '@cronitorio/cronitor-rum';
 import { AuthProvider } from "@/hooks/useAuth";
 import { AuthModalProvider } from "@/contexts/AuthModalContext";
 import { MFAStepUpProvider } from "@/contexts/MFAStepUpContext";
+import { CronitorHealthProvider, useCronitorHealth } from "@/contexts/CronitorHealthContext";
 import { LocationAutoDetectProvider } from "@/components/providers/LocationAutoDetectProvider";
 import { AnalyticsWrapper } from "@/components/analytics/AnalyticsWrapper";
 import { Footer } from "@/components/layout/Footer";
@@ -19,6 +20,8 @@ import { EntityErrorBoundary } from "@/components/error/EntityErrorBoundary";
 import { breadcrumb } from "@/lib/errorBreadcrumbs";
 import { handleError } from "@/lib/errorHandler";
 import { RetryStatusIndicator } from "@/components/ui/retry-status-indicator";
+import { APIStatusBanner } from "@/components/ui/api-status-banner";
+import { cn } from "@/lib/utils";
 
 // Core routes (eager-loaded for best UX)
 import Index from "./pages/Index";
@@ -142,9 +145,15 @@ function AppContent(): React.JSX.Element {
     console.log('[Cronitor] RUM initialized');
   }, []);
 
+  // Check if API status banner is visible to add padding
+  const { passing, isBannerDismissed } = useCronitorHealth();
+  const showBanner = passing === false && !isBannerDismissed;
+
   return (
     <TooltipProvider>
-      <NavigationTracker />
+      <APIStatusBanner />
+      <div className={cn(showBanner && "pt-20")}>
+        <NavigationTracker />
         <LocationAutoDetectProvider />
         <RetryStatusIndicator />
         <Toaster />
@@ -395,7 +404,8 @@ function AppContent(): React.JSX.Element {
           </div>
           <Footer />
         </div>
-      </TooltipProvider>
+      </div>
+    </TooltipProvider>
   );
 }
 
@@ -404,9 +414,11 @@ const App = (): React.JSX.Element => (
     <AuthProvider>
       <AuthModalProvider>
         <MFAStepUpProvider>
-          <BrowserRouter>
-            <AppContent />
-          </BrowserRouter>
+          <CronitorHealthProvider>
+            <BrowserRouter>
+              <AppContent />
+            </BrowserRouter>
+          </CronitorHealthProvider>
         </MFAStepUpProvider>
       </AuthModalProvider>
     </AuthProvider>

src/components/ui/api-status-banner.tsx

@@ -0,0 +1,56 @@
+import { AlertTriangle, X, ExternalLink } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { useCronitorHealth } from '@/contexts/CronitorHealthContext';
+
+/**
+ * Banner displayed when Cronitor detects Supabase API is down
+ * Includes link to status page and dismissal option
+ */
+export function APIStatusBanner() {
+  const { passing, isLoading, isBannerDismissed, dismissBanner } = useCronitorHealth();
+  
+  // Don't show if:
+  // - Still loading initial data
+  // - API is healthy (passing === true)
+  // - User dismissed it
+  // - Status unknown (passing === null) after initial load
+  if (isLoading || passing === true || passing === null || isBannerDismissed) {
+    return null;
+  }
+
+  return (
+    <div className="fixed top-0 left-0 right-0 z-50 bg-destructive text-destructive-foreground shadow-lg">
+      <div className="container mx-auto px-4 py-3">
+        <div className="flex items-center justify-between gap-4">
+          <div className="flex items-center gap-3 flex-1">
+            <AlertTriangle className="h-5 w-5 flex-shrink-0" />
+            <div className="flex-1">
+              <p className="font-semibold">API Monitoring Alert</p>
+              <p className="text-sm opacity-90">
+                Supabase services are experiencing issues. Some features may be temporarily unavailable.
+              </p>
+              <a
+                href="https://status.thrillwiki.com"
+                target="_blank"
+                rel="noopener noreferrer"
+                className="text-sm inline-flex items-center gap-1 mt-1 underline hover:opacity-80 transition-opacity"
+              >
+                View Status Page
+                <ExternalLink className="h-3 w-3" />
+              </a>
+            </div>
+          </div>
+          <Button
+            variant="ghost"
+            size="icon"
+            onClick={dismissBanner}
+            className="flex-shrink-0 hover:bg-destructive-foreground/10 text-destructive-foreground"
+            aria-label="Dismiss alert"
+          >
+            <X className="h-4 w-4" />
+          </Button>
+        </div>
+      </div>
+    </div>
+  );
+}

src/contexts/CronitorHealthContext.tsx

@@ -0,0 +1,63 @@
+import { createContext, useContext, ReactNode, useState, useEffect } from 'react';
+import { useCronitorHealth as useCronitorHealthQuery } from '@/hooks/useCronitorHealth';
+
+interface CronitorHealthContextType {
+  passing: boolean | null; // null = loading/unknown
+  isLoading: boolean;
+  error: Error | null;
+  lastChecked: Date | null;
+  isBannerDismissed: boolean;
+  dismissBanner: () => void;
+}
+
+const CronitorHealthContext = createContext<CronitorHealthContextType | undefined>(undefined);
+
+const DISMISSAL_DURATION = 15 * 60 * 1000; // 15 minutes
+const DISMISSAL_KEY = 'cronitor-banner-dismissed';
+
+export function CronitorHealthProvider({ children }: { children: ReactNode }) {
+  const { data, isLoading, error } = useCronitorHealthQuery();
+  const [dismissedUntil, setDismissedUntil] = useState<number | null>(() => {
+    const stored = localStorage.getItem(DISMISSAL_KEY);
+    return stored ? parseInt(stored) : null;
+  });
+
+  const dismissBanner = () => {
+    const until = Date.now() + DISMISSAL_DURATION;
+    localStorage.setItem(DISMISSAL_KEY, until.toString());
+    setDismissedUntil(until);
+  };
+
+  const isBannerDismissed = dismissedUntil ? Date.now() < dismissedUntil : false;
+  
+  // Auto-clear dismissal when API is healthy again
+  useEffect(() => {
+    if (data?.passing === true && dismissedUntil) {
+      localStorage.removeItem(DISMISSAL_KEY);
+      setDismissedUntil(null);
+    }
+  }, [data?.passing, dismissedUntil]);
+
+  return (
+    <CronitorHealthContext.Provider
+      value={{
+        passing: data?.passing ?? null,
+        isLoading,
+        error: error as Error | null,
+        lastChecked: data ? new Date() : null,
+        isBannerDismissed,
+        dismissBanner,
+      }}
+    >
+      {children}
+    </CronitorHealthContext.Provider>
+  );
+}
+
+export function useCronitorHealth() {
+  const context = useContext(CronitorHealthContext);
+  if (context === undefined) {
+    throw new Error('useCronitorHealth must be used within CronitorHealthProvider');
+  }
+  return context;
+}

src/hooks/useCronitorHealth.ts

@@ -0,0 +1,37 @@
+import { useQuery } from '@tanstack/react-query';
+
+const CRONITOR_API_URL = 'https://cronitor.io/api/monitors/88kG4W?env=production&format=json';
+const POLL_INTERVAL = 60000; // 60 seconds
+
+interface CronitorResponse {
+  passing: boolean;
+  [key: string]: any; // Other fields we don't need
+}
+
+/**
+ * Hook to poll Cronitor API for health status
+ * Returns the monitor's passing status (true = healthy, false = down)
+ */
+export function useCronitorHealth() {
+  return useQuery({
+    queryKey: ['cronitor-health'],
+    queryFn: async (): Promise<CronitorResponse> => {
+      const response = await fetch(CRONITOR_API_URL, {
+        method: 'GET',
+        headers: {
+          'Accept': 'application/json',
+        },
+      });
+      
+      if (!response.ok) {
+        throw new Error(`Cronitor API error: ${response.status}`);
+      }
+      
+      return response.json();
+    },
+    refetchInterval: POLL_INTERVAL, // Auto-poll every 60 seconds
+    retry: 2, // Retry failed requests twice
+    staleTime: 30000, // Consider data stale after 30 seconds
+    gcTime: 5 * 60 * 1000, // Keep in cache for 5 minutes
+  });
+}