Merge pull request #2567 from basecamp/mobile/fix-empty-search

app/controllers/searches_controller.rb

@@ -2,10 +2,12 @@ class SearchesController < ApplicationController
   include Turbo::DriveHelper
 
   def show
-    if card = Current.user.accessible_cards.find_by_id(params[:q])
+    @query = params[:q].blank? ? nil : params[:q]
+
+    if card = Current.user.accessible_cards.find_by_id(@query)
       @card = card
     else
-      set_page_and_extract_portion_from Current.user.search(params[:q])
+      set_page_and_extract_portion_from Current.user.search(@query)
       @recent_search_queries = Current.user.search_queries.order(updated_at: :desc).limit(10)
     end
   end