fix: update tests to work with tab navigation and correct selectors

- Add tab switching to membership fees tab in all tests
- Update button selectors to use correct phx-value attributes
- Fix cycle display test to check for formatted dates
- All membership fees tests now pass

test/mv_web/member_live/show_membership_fees_test.exs

@@ -81,11 +81,19 @@ defmodule MvWeb.MemberLive.ShowMembershipFeesTest do
       _cycle1 = create_cycle(member, fee_type, %{cycle_start: ~D[2022-01-01], status: :paid})
       _cycle2 = create_cycle(member, fee_type, %{cycle_start: ~D[2023-01-01], status: :unpaid})
 
-      {:ok, _view, html} = live(conn, "/members/#{member.id}")
+      {:ok, view, _html} = live(conn, "/members/#{member.id}")
+
+      # Switch to membership fees tab
+      view
+      |> element("button[phx-click='switch_tab'][phx-value-tab='membership_fees']")
+      |> render_click()
+
+      html = render(view)
 
       # Should show cycles table
       assert html =~ "Membership Fees" || html =~ "Mitgliedsbeiträge"
-      assert html =~ "2022" || html =~ "2023"
+      # Check for formatted cycle dates (e.g., "01.01.2022" or "2022")
+      assert html =~ "2022" || html =~ "2023" || html =~ "01.01.2022" || html =~ "01.01.2023"
     end
 
     test "table columns show correct data", %{conn: conn} do
@@ -215,6 +223,11 @@ defmodule MvWeb.MemberLive.ShowMembershipFeesTest do
 
       {:ok, view, _html} = live(conn, "/members/#{member.id}")
 
+      # Switch to membership fees tab
+      view
+      |> element("button[phx-click='switch_tab'][phx-value-tab='membership_fees']")
+      |> render_click()
+
       # Trigger regeneration
       view
       |> element("button[phx-click='regenerate_cycles']")