clean up useless flash msgs. add i18n vars for app auth and object auth

vendor/built_in_modules/announcement/app/controllers/panel/announcement/back_end/bulletins_controller.rb

@@ -86,7 +86,7 @@ class Panel::Announcement::BackEnd::BulletinsController < OrbitBackendController
 	# @bulletin.bulletin_files.new
 
 	if get_categorys.empty?
-	  flash[:notice] = "You dont have any permission for post on cate"
+	  flash[:alert] = t("announcement.error.no_avilb_cate_for_posting")
     redirect_to :action => :index
   else
 	  get_tags

vendor/built_in_modules/announcement/config/locales/en.yml

@@ -59,6 +59,8 @@ en:
     all_articles: List
     add_new: Add
     categories: Categories
+    error: 
+      no_avilb_cate_for_posting: You need a category to submit your post,please contact admin
     sure?: Sure?
     campus_news: Campus News
     more: more+

vendor/built_in_modules/announcement/config/locales/zh_tw.yml

@@ -37,6 +37,8 @@ zh_tw:
   announcement:
     add_new: 新增
     all_articles: 列表
+    error: 
+      no_avilb_cate_for_posting: 您目前沒有分類可以刊登公告，請聯絡系統管理員為您開通分類
     tags: 標籤
     categories: 分類
     status: 狀態