Update select filter with hints

app/helpers/filters_helper.rb

@@ -89,7 +89,7 @@ module FiltersHelper
 
   def assigned_to_filter_options(user)
     user_options = user.support? ? User.all : (user.organisation.users + user.organisation.managing_agents.flat_map(&:users) + user.organisation.stock_owners.flat_map(&:users)).uniq
-    [OpenStruct.new(id: "", name: "Select an option")] + user_options.map { |user_option| OpenStruct.new(id: user_option.id, name: user_option.name) }
+    [OpenStruct.new(id: "", name: "Select an option", hint: "")] + user_options.map { |user_option| OpenStruct.new(id: user_option.id, name: user_option.name, hint: user_option.email) }
   end
 
   def collection_year_options

app/views/filters/_radio_filter.html.erb

@@ -11,6 +11,7 @@
             category: option[:conditional_filter][:category],
             label: option[:conditional_filter][:label],
             secondary: true,
+            hint_text: option[:conditional_filter][:hint_text],
           } %>
       <% end %>
     <% end %>

app/views/filters/_select_filter.html.erb

@@ -1,7 +1,10 @@
-<%= f.govuk_collection_select category.to_sym,
-    collection,
-    :id,
-    :name,
-    label: { hidden: secondary },
-    options: { disabled: [""], selected: selected_option(category, @filter_type) },
-    "data-controller": %w[accessible-autocomplete conditional-filter] %>
+<%= f.govuk_select(category.to_sym,
+  label: { text: label, hidden: secondary },
+  "data-controller": "accessible-autocomplete conditional-filter") do %>
+    <% collection.each do |answer| %>
+      <option value="<%= answer.id %>"
+        data-hint="<%= answer.hint %>"
+        <%= answer.id.to_s == selected_option(category, @filter_type).to_s ? "selected" : "" %>
+        <%= answer.id == "" ? "disabled" : "" %>><%= answer.name %></option>
+    <% end %>
+  <% end %>