chore: if name or display name is not defined in metadata, set npub in top right

src/components/AppBar/AppBar.tsx

@@ -28,6 +28,7 @@ import {
 } from '../../routes'
 import {
   clearAuthToken,
+  hexToNpub,
   saveNsecBunkerDelegatedKey,
   shorten
 } from '../../utils'
@@ -60,13 +61,17 @@ export const AppBar = () => {
           setUserAvatar(picture || userRobotImage)
         }
 
-        setUsername(shorten(display_name || name || '', 7))
+        const npub = authState.usersPubkey
+          ? hexToNpub(authState.usersPubkey)
+          : ''
+
+        setUsername(shorten(display_name || name || npub, 7))
       } else {
         setUserAvatar(userRobotImage || '')
         setUsername('')
       }
     }
-  }, [metadataState, userRobotImage])
+  }, [metadataState, userRobotImage, authState.usersPubkey])
 
   const handleOpenUserMenu = (event: React.MouseEvent<HTMLElement>) => {
     setAnchorElUser(event.currentTarget)