FEATURE: show recent searches in quick search panel (#15024)

db/migrate/20211123144714_add_recent_searches.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class AddRecentSearches < ActiveRecord::Migration[6.1]
+  def change
+    add_column :user_options, :oldest_search_log_date, :datetime
+
+    add_index :search_logs, [:user_id, :created_at], where: 'user_id IS NOT NULL'
+  end
+end