Use xo-cash/utils sse. Add vending machine template. Greatly improve startup times.

src/tui/hooks/useAppContext.tsx

@@ -71,7 +71,7 @@ export function AppProvider({
       });
 
       // Start the AppService (loads existing invitations)
-      await service.start();
+      service.start();
 
       // Set the service and mark as initialized
       setAppService(service);

src/tui/screens/SeedInput.tsx

@@ -158,9 +158,7 @@ export function SeedInputScreen(): React.ReactElement {
         setSeedPhrase('');
         setSaveMnemonicChecked(false);
 
-        setTimeout(() => {
-          navigate('wallet');
-        }, 500);
+        navigate('wallet');
       } catch (error) {
         const message =
           error instanceof Error ? error.message : 'Failed to initialize wallet';