feat(account): 增加账号中心页面与入口

test/support/fake_account_repository.dart

@@ -55,8 +55,8 @@ class FakeAccountRepository implements AccountRepository {
   );
 
   AccountProfile _profile;
-  List<AccountDevice> _devices;
-  AccountExport _export;
+  final List<AccountDevice> _devices;
+  final AccountExport _export;
   AccountProfileUpdate? lastUpdate;
   String? lastDeactivateReason;
   int profileCalls = 0;