Improve user-facing string if taker daemon shuts down

Make the error toast suggest the next reasonable action in case of such event.

daemon/src/taker.rs

@@ -304,7 +304,7 @@ async fn main() -> Result<()> {
         loop {
             maker_online_status_feed_receiver.changed().await.unwrap();
             if maker_online_status_feed_receiver.borrow().clone() == ConnectionStatus::Offline {
-                tracing::info!("Maker is offline. Shutting down the taker");
+                tracing::info!("Lost connection to maker, shutting down. Please restart the daemon to reconnect");
                 rocket::Shutdown::notify(shutdown_handle);
                 return;
             }

taker-frontend/src/App.tsx

@@ -45,7 +45,7 @@ async function postCfdOrderRequest(payload: CfdOrderRequestPayload) {
 
 export const App = () => {
     const toast = useToast();
-    useBackendMonitor(toast, 5000); // 5s timeout
+    useBackendMonitor(toast, 5000, "Please start the taker again to reconnect..."); // 5s timeout
 
     const {
         lastMessage,

taker-frontend/src/components/BackendMonitor.tsx

@@ -13,7 +13,8 @@ async function fetchWithTimeout(resource: any, timeout: number) {
 // Check for backend's presence by sending a request to '/alive' endpoint.
 // When the backend's not there, the request is likely to timeout, triggering a
 // persistent toast notification that goes away when the daemon is back online.
-export function useBackendMonitor(toast: any, timeout_ms: number): void {
+// `description` is a user-facing string describing problem/possible action.
+export function useBackendMonitor(toast: any, timeout_ms: number, description: string): void {
     const toastIdRef = useRef();
 
     const checkForBackend: () => void = async () => {
@@ -31,7 +32,7 @@ export function useBackendMonitor(toast: any, timeout_ms: number): void {
             if (!toastIdRef.current) {
                 toastIdRef.current = toast({
                     title: "Connection Error",
-                    description: "Daemon process is not running",
+                    description,
                     status: "error",
                     position: "top",
                     duration: timeout_ms * 100000, // we don't want this to be closed