fix: onboarding address required fallback; ticket staleTime:0 for instant status refresh

app/(app)/clients/new.tsx

@@ -135,8 +135,8 @@ export default function NewClientScreen() {
         firstName: firstName.trim(),
         lastName:  lastName.trim(),
         phone:     phone.trim(),
+        address:   address.trim() || '—',   // API requires non-empty address
         ...(email.trim() ? { email: email.trim() } : {}),
-        ...(address.trim() ? { address: address.trim() } : {}),
         ...(areaId       ? { areaId }               : {}),
       });
       const client = clientRes.data;

app/(app)/tasks/[id].tsx

@@ -67,6 +67,7 @@ export default function TicketDetailScreen() {
   const { data: ticket, isLoading, refetch } = useQuery({
     queryKey: ['task', id],
     queryFn: () => api.get(`/api/v1/tickets/${id}`).then(r => r.data),
+    staleTime: 0,
   });
 
   // Fetch client with subscriptions when ticket loads (for prepaid gate)