style: consistent save buttons and active tab

lib/mv_web/live/group_live/form.ex

@@ -77,7 +77,7 @@ defmodule MvWeb.GroupLive.Form do
   def render(assigns) do
     ~H"""
     <Layouts.app flash={@flash} current_user={@current_user}>
-      <.form for={@form} id="group-form" phx-change="validate" phx-submit="save">
+      <.form class="max-w-2xl" for={@form} id="group-form" phx-change="validate" phx-submit="save">
         <.header>
           <:leading>
             <.button navigate={return_path(@return_to, @group)} variant="neutral">
@@ -86,11 +86,6 @@ defmodule MvWeb.GroupLive.Form do
             </.button>
           </:leading>
           {@page_title}
-          <:actions>
-            <.button phx-disable-with={gettext("Saving...")} variant="primary" type="submit">
-              {gettext("Save")}
-            </.button>
-          </:actions>
         </.header>
 
         <div class="mt-6 space-y-6">
@@ -104,6 +99,20 @@ defmodule MvWeb.GroupLive.Form do
             />
           </div>
 
+          <%!-- Buttons: below all form fields, Abbrechen left (secondary), Speichern right (primary) --%>
+          <div class="mt-6 flex items-center justify-end gap-4">
+            <.button navigate={return_path(@return_to, @group)} variant="neutral" type="button">
+              {gettext("Cancel")}
+            </.button>
+            <.button
+              type="submit"
+              phx-disable-with={gettext("Saving...")}
+              variant="primary"
+            >
+              {gettext("Save group")}
+            </.button>
+          </div>
+
           <%!-- Danger zone: canonical pattern (same as member form) --%>
           <%= if @group && can?(@current_user, :destroy, @group) do %>
             <section class="mt-8 mb-6" aria-labelledby="danger-zone-heading">