thumbhash improvements

thumbhash render box

refactor

wip

rebase

mobile/lib/extensions/datetime_extensions.dart

@@ -85,3 +85,13 @@ extension DateRangeFormatting on DateTime {
     }
   }
 }
+
+extension IsSameExtension on DateTime {
+  bool isSameDay(DateTime other) {
+    return day == other.day && month == other.month && year == other.year;
+  }
+
+  bool isSameMonth(DateTime other) {
+    return month == other.month && year == other.year;
+  }
+}