Add ability to view previous edits of a status in admin UI (#19462)

* Add ability to view previous edits of a status in admin UI

* Change moderator access to posts to be controlled by a separate policy

app/policies/admin/status_policy.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+class Admin::StatusPolicy < ApplicationPolicy
+  def initialize(current_account, record, preloaded_relations = {})
+    super(current_account, record)
+
+    @preloaded_relations = preloaded_relations
+  end
+
+  def index?
+    role.can?(:manage_reports, :manage_users)
+  end
+
+  def show?
+    role.can?(:manage_reports, :manage_users) && (record.public_visibility? || record.unlisted_visibility? || record.reported?)
+  end
+
+  def destroy?
+    role.can?(:manage_reports)
+  end
+
+  def update?
+    role.can?(:manage_reports)
+  end
+
+  def review?
+    role.can?(:manage_taxonomies)
+  end
+end

app/policies/status_policy.rb

@@ -7,10 +7,6 @@ class StatusPolicy < ApplicationPolicy
     @preloaded_relations = preloaded_relations
   end
 
-  def index?
-    role.can?(:manage_reports, :manage_users)
-  end
-
   def show?
     return false if author.suspended?
 
@@ -32,17 +28,13 @@ class StatusPolicy < ApplicationPolicy
   end
 
   def destroy?
-    role.can?(:manage_reports) || owned?
+    owned?
   end
 
   alias unreblog? destroy?
 
   def update?
-    role.can?(:manage_reports) || owned?
-  end
-
-  def review?
-    role.can?(:manage_taxonomies)
+    owned?
   end
 
   private