fix: handle notification endpoint failures

app/api/notifications/check/route.ts

@@ -26,6 +26,10 @@ function isCronAuthorized(request: Request) {
   return authHeader === `Bearer ${secret}` || secretHeader === secret;
 }
 
+function getErrorMessage(error: unknown) {
+  return error instanceof Error ? error.message : "Unknown notification check error.";
+}
+
 export async function GET(request: Request) {
   if (!isCronAuthorized(request)) {
     return NextResponse.json({ error: "Unauthorized." }, { status: 401 });
@@ -34,6 +38,7 @@ export async function GET(request: Request) {
     return NextResponse.json({ error: "Web Push is not configured." }, { status: 503 });
   }
 
+  try {
     const now = Date.now();
     const warnings = (await fetchMeteoWarnings(AbortSignal.timeout(12_000))).filter((warning) => isRelevantWarning(warning, now));
     const subscriptions = getPushSubscriptions().filter((subscription) => subscription.enabled);
@@ -74,4 +79,10 @@ export async function GET(request: Request) {
       skipped,
       failed,
     });
+  } catch (error) {
+    return NextResponse.json({
+      error: "Unable to check IMGW meteorological warnings.",
+      details: getErrorMessage(error),
+    }, { status: 502 });
+  }
 }

app/api/notifications/daily-brief/route.ts

@@ -42,7 +42,11 @@ export async function GET(request: Request) {
     && Number.isFinite(subscription.latitude)
     && Number.isFinite(subscription.longitude)
   ));
-  const warnings = await fetchMeteoWarnings(AbortSignal.timeout(12_000));
+  let warningsUnavailable = false;
+  const warnings = await fetchMeteoWarnings(AbortSignal.timeout(12_000)).catch(() => {
+    warningsUnavailable = true;
+    return [];
+  });
   let sent = 0;
   let skipped = 0;
   let failed = 0;
@@ -82,6 +86,7 @@ export async function GET(request: Request) {
     ok: true,
     date: dateKey,
     subscriptions: subscriptions.length,
+    warningsUnavailable,
     sent,
     skipped,
     failed,