fix #3

- server edit page display bugs, include userPubKey and pubKeyIdx

lib/core/build_mode.dart

@@ -6,7 +6,7 @@ enum _BuildMode {
   profile,
 }
 
-_BuildMode _buildMode = (() {
+final _buildMode = (() {
   if (const bool.fromEnvironment('dart.vm.product')) {
     return _BuildMode.release;
   }

lib/core/provider_base.dart

@@ -9,11 +9,6 @@ class ProviderBase with ChangeNotifier {
   }
 }
 
-enum ProviderState {
-  idle,
-  busy,
-}
-
 class BusyProvider extends ProviderBase {
   bool _isBusy = false;
   bool get isBusy => _isBusy;