feat: make checkbox column in member view sticky

test/mv_web/member_live/index_test.exs

@@ -90,6 +90,25 @@ defmodule MvWeb.MemberLive.IndexTest do
       refute html =~ ~s(id="members-keyboard" class="overflow-x-auto")
       refute html =~ ~s(id="members-keyboard" class="overflow-auto")
     end
+
+    test "members table keeps checkbox column sticky while horizontally scrolling", %{conn: conn} do
+      system_actor = SystemActor.get_system_actor()
+
+      {:ok, _member} =
+        Membership.create_member(
+          %{first_name: "Sticky", last_name: "Column", email: "sticky-column@example.com"},
+          actor: system_actor
+        )
+
+      conn = conn_with_oidc_user(conn)
+      {:ok, _view, html} = live(conn, ~p"/members")
+
+      # Contract: first column (select-all header + row checkbox cells) is sticky on the left
+      assert html =~ "left-0"
+      assert html =~ "sticky"
+      assert html =~ "z-30"
+      assert html =~ "z-20"
+    end
   end
 
   describe "translations" do
@@ -351,10 +370,12 @@ defmodule MvWeb.MemberLive.IndexTest do
     assert_redirect(view, ~p"/members/#{member}")
   end
 
-  describe "table row outline (hover and selected)" do
+  describe "table row highlight (hover and selected)" do
     @describetag :ui
 
-    test "clickable rows have hover and focus-within ring classes", %{conn: conn} do
+    test "clickable rows with sticky first column use hover/focus background highlight", %{
+      conn: conn
+    } do
       system_actor = SystemActor.get_system_actor()
 
       {:ok, _member} =
@@ -366,10 +387,9 @@ defmodule MvWeb.MemberLive.IndexTest do
       conn = conn_with_oidc_user(conn)
       {:ok, _view, html} = live(conn, "/members")
 
-      # CoreComponents table adds hover and focus-within ring when row_click is set
-      assert html =~ "hover:ring-2"
-      assert html =~ "focus-within:ring-2"
-      assert html =~ "hover:ring-base-content/10"
+      # Sticky-first-column tables: hover/focus fills live in CSS; wrapper is marked for tests.
+      assert html =~ ~s(data-sticky-first-col-rows="true")
+      refute html =~ "hover:ring-2"
     end
 
     test "selected outline only from checkbox selection, not from highlight param", %{conn: conn} do