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

---------

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';

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

@@ -0,0 +1,21 @@
+@@ -144,19 +144,19 @@ class ApiClient {
+     );
+   }
+
+-  Future<dynamic> deserializeAsync(String json, String targetType, {bool growable = false,}) async =>
++  Future<dynamic> deserializeAsync(String json, String targetType, {bool growable = false,}) =>
+     // ignore: deprecated_member_use_from_same_package
+     deserialize(json, targetType, growable: growable);
+
+   @Deprecated('Scheduled for removal in OpenAPI Generator 6.x. Use deserializeAsync() instead.')
+-  dynamic deserialize(String json, String targetType, {bool growable = false,}) {
++  Future<dynamic> deserialize(String json, String targetType, {bool growable = false,}) async {
+     // Remove all spaces. Necessary for regular expressions as well.
+     targetType = targetType.replaceAll(' ', ''); // ignore: parameter_assignments
+
+     // If the expected target type is String, nothing to do...
+     return targetType == 'String'
+       ? json
+-      : _deserialize(jsonDecode(json), targetType, growable: growable);
++      : _deserialize(await compute((String j) => jsonDecode(j), json), targetType, growable: growable);
+   }