fix: improve get_last_completed_cycle and fix test helpers

- Fix get_last_completed_cycle to find most recent completed cycle
- Fix create_cycle helpers to delete auto-generated cycles first
- Fix Ash.destroy return value handling
- Fix form selectors to use specific IDs
- Fix URL parameter names for filters
- Fix Ash.read_one return value expectations in tests

test/mv_web/member_live/show_membership_fees_test.exs

@@ -58,6 +58,14 @@ defmodule MvWeb.MemberLive.ShowMembershipFeesTest do
 
   # Helper to create a cycle
   defp create_cycle(member, fee_type, attrs) do
+    # Delete any auto-generated cycles first to avoid conflicts
+    existing_cycles =
+      MembershipFeeCycle
+      |> Ash.Query.filter(member_id == ^member.id)
+      |> Ash.read!()
+
+    Enum.each(existing_cycles, fn cycle -> Ash.destroy!(cycle) end)
+
     default_attrs = %{
       cycle_start: ~D[2023-01-01],
       amount: Decimal.new("50.00"),