add signin function

lib/pages/phone_input.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:fcs/pages/util.dart';
-import 'package:fcs/theme/theme.dart';
+import 'package:fcs/fcs/common/theme.dart';
 import 'package:fcs/widget/local_text.dart';
 import 'package:fcs/widget/localization/app_translations.dart';
 
@@ -16,7 +16,7 @@ class _PhoneEditorState extends State<PhoneEditor> {
   @override
   void initState() {
     super.initState();
-    _phone.text ='09';
+    _phone.text = '09';
   }
 
   @override