fix: handle empty cycles result in regenerate_cycles event

- Match {:ok, cycles, notifications} tuple correctly
- Handle case when no cycles are generated ({:ok, [], []})
- Prevents CaseClauseError when regeneration produces no new cycles

lib/mv_web/live/member_live/show/membership_fees_component.ex

@@ -398,7 +398,7 @@ defmodule MvWeb.MemberLive.Show.MembershipFeesComponent do
     member = socket.assigns.member
 
     case CycleGenerator.generate_cycles_for_member(member.id) do
-      {:ok, _new_cycles} ->
+      {:ok, _new_cycles, _notifications} ->
         # Reload member with cycles
         updated_member =
           member