Add chip filters for the new time window filters

rename close => closure to ease interpretation by the LLM

app/models/filter/fields.rb

@@ -17,7 +17,7 @@ module Filter::Fields
 
   included do
     store_accessor :fields, :assignment_status, :indexed_by, :terms,
-      :engagement_status, :card_ids, :creation, :close
+      :engagement_status, :card_ids, :creation, :closure
 
     def assignment_status
       super.to_s.inquiry
@@ -35,8 +35,8 @@ module Filter::Fields
       TimeWindowParser.parse(creation)
     end
 
-    def close_window
-      TimeWindowParser.parse(close)
+    def closure_window
+      TimeWindowParser.parse(closure)
     end
 
     def terms

app/models/filter/params.rb

@@ -41,7 +41,7 @@ module Filter::Params
       params[:indexed_by]        = indexed_by
       params[:engagement_status] = engagement_status
       params[:creation]          = creation
-      params[:close]             = close
+      params[:closure]           = closure
       params[:assignment_status] = assignment_status
       params[:terms]             = terms
       params[:tag_ids]           = tags.ids