Fix: stabilize ActivityFeed UI on reload

Avoid shared dev rate-limit bucket for n8n status and fall back to a stable offline state when the status call fails, preventing the widget from getting stuck in the small translucent loading UI.

app/api/n8n/status/route.ts

@@ -6,10 +6,21 @@ export const revalidate = 30;
 
 export async function GET(request: NextRequest) {
   // Rate limiting for n8n status endpoint
-  const ip = request.headers.get('x-forwarded-for') || request.headers.get('x-real-ip') || 'unknown';
+  const ip =
+    request.headers.get("x-forwarded-for") ||
+    request.headers.get("x-real-ip") ||
+    "unknown";
+  const ua = request.headers.get("user-agent") || "unknown";
   const { checkRateLimit } = await import('@/lib/auth');
   
-  if (!checkRateLimit(ip, 30, 60000)) { // 30 requests per minute for status
+  // In dev, many requests can share ip=unknown; use UA to avoid a shared bucket.
+  const rateKey =
+    process.env.NODE_ENV === "development" && ip === "unknown"
+      ? `ua:${ua.slice(0, 120)}`
+      : ip;
+  const maxPerMinute = process.env.NODE_ENV === "development" ? 300 : 30;
+
+  if (!checkRateLimit(rateKey, maxPerMinute, 60000)) { // requests per minute
     return NextResponse.json(
       { error: 'Rate limit exceeded. Please try again later.' },
       { status: 429 }