add pagination for invoice and update ui for material 3

lib/pages/signin/invitation_request_page.dart

@@ -1,10 +1,9 @@
 import 'package:fcs/pages/main/model/main_model.dart';
 import 'package:fcs/pages/main/util.dart';
+import 'package:fcs/pages/widgets/local_app_bar.dart';
 import 'package:fcs/pages/widgets/local_text.dart';
 import 'package:fcs/pages/widgets/progress.dart';
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
 
 import '../../helpers/theme.dart';
@@ -29,14 +28,7 @@ class _RequestInvitationPageState extends State<RequestInvitationPage> {
     return LocalProgress(
       inAsyncCall: _isLoading,
       child: new Scaffold(
-        appBar: AppBar(
-          centerTitle: true,
-          leading: new IconButton(
-            icon: new Icon(CupertinoIcons.back),
-            onPressed: () => Navigator.of(context).pop(),
-          ),
-          backgroundColor: primaryColor,
-        ),
+        appBar: LocalAppBar(),
         body: _buildBody(context),
       ),
     );
@@ -91,6 +83,11 @@ class _RequestInvitationPageState extends State<RequestInvitationPage> {
             mainAxisAlignment: MainAxisAlignment.center,
             children: <Widget>[
               ElevatedButton(
+                style: ElevatedButton.styleFrom(
+                    elevation: 0,
+                    shape: RoundedRectangleBorder(
+                        borderRadius: BorderRadius.all(Radius.circular(3))),
+                    backgroundColor: primaryColor),
                 onPressed: _request,
                 child: Text(getLocalString(context, "invite.request")),
               )