Angular UI router not resolving injected parameters

Question

So consider the following fragment from my angularUI routing setup. I am navigating to the route /category/manage/4/details (for example). I expect 'category' to be resolved before the relevant controller loads, and indeed it is to the extent that I can put a breakpoint inside the resolve function that returns the category from the category service and see that the category has been returned. Now putting another breakpoint inside the controller itself I can see that 'category' is always undefined. It is not injected by UI router.

Can anyone see the problem? It may be somewhere other than in the code I've provided but as I have no errors when I run the code, it's impossible to tell where the source of the issue might lie. Typical js silent failures!

        .state('category.manage', {
            url: '/manage',
            templateUrl: '/main/category/tree',
            controller: 'CategoryCtrl'
        })
        .state('category.manage.view', {
            abstract: true,
            url: '/{categoryId:[0-9]*}',
            resolve: {
                category: ['CategoryService', '$stateParams', function (CategoryService, $stateParams) {
                    return CategoryService.getCategory($stateParams.categoryId).then(returnData); //this line runs before the controller is instantiated
                }]
            },
            views: {
                'category-content': {
                    templateUrl: '/main/category/ribbon',
                    controller: ['$scope', 'category', function ($scope, category) {
                        $scope.category = category; //category is always undefined, i.e., UI router is not injecting it
                    }]
                }
            },
        })
            .state('category.manage.view.details', {
                url: '/details',
                data: { mode: 'view' },
                templateUrl: '/main/category/details',
                controller: 'CategoryDetailsCtrl as details'
            })

Answer 1

The concept is working. I created working plunker here. The changes is here

instead of this

resolve: {
    category: ['CategoryService', '$stateParams', function (CategoryService, $stateParams) {
        //this line runs before the controller is instantiated
        return CategoryService.getCategory($stateParams.categoryId).then(returnData); 
    }]
},

I just returned the result of the getCategory...

resolve: {
    category: ['CategoryService', '$stateParams', function (CategoryService, $stateParams) {
      return CategoryService.getCategory($stateParams.categoryId); // not then
    }]
},

with naive service implementation:

.factory('CategoryService', function() {return {
  getCategory : function(id){
    return { category : 'SuperClass', categoryId: id };
  }
}});

even if that would be a promise... resolve will wait until it is processed...

.factory('CategoryService', function($timeout) {return {
  getCategory : function(id){
    return $timeout(function() {
        return { category : 'SuperClass', categoryId: id };
    }, 500);
  }
}});