fix: handle null or no expiry field being sent back from server

app/src/main/java/com/cappielloantonio/tempo/util/UIUtil.java

@@ -105,7 +105,11 @@ public class UIUtil {
     }
 
     public static String getReadableDate(Date date) {
+        if (date == null) {
+            return App.getContext().getString(R.string.share_no_expiration); 
+        }
         SimpleDateFormat formatter = new SimpleDateFormat("dd MMM, yyyy", Locale.getDefault());
         return formatter.format(date);
     }
+
 }

app/src/main/res/values/strings.xml

@@ -409,6 +409,7 @@
     <string name="share_bottom_sheet_delete">Delete share</string>
     <string name="share_bottom_sheet_update">Update share</string>
     <string name="share_subtitle_item">Expiration date: %1$s</string>
+    <string name="share_no_expiration">Never</string>
     <string name="share_unsupported_error">Sharing is not supported or not enabled</string>
     <string name="asset_link_clipboard_label">Tempus asset link</string>
     <string name="asset_link_label_song">Song UID</string>