refactor: split long sort handler into smaller functions

Extract determine_new_sort/2, update_sort_components/4, and push_sort_url/3
from handle_info({:sort, ...}). Reduces function from 46 to 7 lines.

lib/mv_web/live/member_live/index.ex

@@ -111,50 +111,11 @@ defmodule MvWeb.MemberLive.Index do
   @impl true
   def handle_info({:sort, field_str}, socket) do
     field = String.to_existing_atom(field_str)
-    old_field = socket.assigns.sort_field
+    {new_field, new_order} = determine_new_sort(field, socket)
 
-    {new_order, new_field} =
-      if socket.assigns.sort_field == field do
-        {toggle_order(socket.assigns.sort_order), field}
-      else
-        {:asc, field}
-      end
-
-    active_id = :"sort_#{new_field}"
-    old_id = :"sort_#{old_field}"
-
-    # Update the new SortHeader
-    send_update(MvWeb.Components.SortHeaderComponent,
-      id: active_id,
-      sort_field: new_field,
-      sort_order: new_order
-    )
-
-    # Reset the current SortHeader
-    send_update(MvWeb.Components.SortHeaderComponent,
-      id: old_id,
-      sort_field: new_field,
-      sort_order: new_order
-    )
-
-    existing_search_query = socket.assigns.query
-
-    # Build the URL with queries
-    query_params = %{
-      "query" => existing_search_query,
-      "sort_field" => Atom.to_string(new_field),
-      "sort_order" => Atom.to_string(new_order)
-    }
-
-    # Set the new path with params
-    new_path = ~p"/members?#{query_params}"
-
-    # Push the new URL
-    {:noreply,
-     push_patch(socket,
-       to: new_path,
-       replace: true
-     )}
+    socket
+    |> update_sort_components(socket.assigns.sort_field, new_field, new_order)
+    |> push_sort_url(new_field, new_order)
   end
 
   @impl true
@@ -206,6 +167,55 @@ defmodule MvWeb.MemberLive.Index do
   # -------------------------------------------------------------
   # FUNCTIONS
   # -------------------------------------------------------------
+
+  # Determines new sort field and order based on current state
+  defp determine_new_sort(field, socket) do
+    if socket.assigns.sort_field == field do
+      {field, toggle_order(socket.assigns.sort_order)}
+    else
+      {field, :asc}
+    end
+  end
+
+  # Updates both the active and old SortHeader components
+  defp update_sort_components(socket, old_field, new_field, new_order) do
+    active_id = :"sort_#{new_field}"
+    old_id = :"sort_#{old_field}"
+
+    # Update the new SortHeader
+    send_update(MvWeb.Components.SortHeaderComponent,
+      id: active_id,
+      sort_field: new_field,
+      sort_order: new_order
+    )
+
+    # Reset the current SortHeader
+    send_update(MvWeb.Components.SortHeaderComponent,
+      id: old_id,
+      sort_field: new_field,
+      sort_order: new_order
+    )
+
+    socket
+  end
+
+  # Builds sort URL and pushes navigation patch
+  defp push_sort_url(socket, field, order) do
+    query_params = %{
+      "query" => socket.assigns.query,
+      "sort_field" => Atom.to_string(field),
+      "sort_order" => Atom.to_string(order)
+    }
+
+    new_path = ~p"/members?#{query_params}"
+
+    {:noreply,
+     push_patch(socket,
+       to: new_path,
+       replace: true
+     )}
+  end
+
   # Load members eg based on a query for sorting
   defp load_members(socket, search_query) do
     query =