dev(mobile): Fix freeze bug on app start (#1732)

* Group by date objects instead of strings

* Change OpenAPI code generation to wrap json decoding in
Change OpenAPI code generation to wrap decodeJson in compute

* Remove orig file

* Fix linter error

* Change drag handle date format

* Order timeline explictly from new to old

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Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

server/openapi-generator/patch/api.dart.patch

@@ -0,0 +1,8 @@
+@@ -14,6 +14,7 @@ import 'dart:async';
+ import 'dart:convert';
+ import 'dart:io';
+
++import 'package:flutter/foundation.dart';
+ import 'package:http/http.dart';
+ import 'package:intl/intl.dart';
+ import 'package:meta/meta.dart';