feat: improve field order for approvals and add seeds

lib/mv_web/live/global_settings_live.ex

@@ -93,6 +93,7 @@ defmodule MvWeb.GlobalSettingsLive do
       |> assign(:smtp_test_result, nil)
       |> assign(:smtp_test_to_email, "")
       |> assign_join_form_state(settings, custom_fields)
+      |> assign(:join_url, url(socket.endpoint, ~p"/join"))
       |> assign_form()
 
     {:ok, socket}
@@ -153,6 +154,33 @@ defmodule MvWeb.GlobalSettingsLive do
         </div>
 
         <div :if={@join_form_enabled}>
+          <%!-- Copyable join page link (below checkbox, above field list) --%>
+          <div class="mb-4 p-3 max-w-2xl rounded-lg border border-base-300 bg-base-200/50">
+            <p class="text-sm text-base-content/70 mb-2">
+              {gettext("Link to the public join page (share this with applicants):")}
+            </p>
+            <div class="flex flex-wrap items-center gap-2">
+              <input
+                type="text"
+                readonly
+                value={@join_url}
+                class="input input-bordered input-sm flex-1 min-w-0 font-mono text-sm"
+                aria-label={gettext("Join page URL")}
+              />
+              <.button
+                variant="secondary"
+                size="sm"
+                id="copy-join-url-btn"
+                phx-hook="CopyToClipboard"
+                phx-click="copy_join_url"
+                aria-label={gettext("Copy join page URL")}
+              >
+                <.icon name="hero-clipboard-document" class="size-4" />
+                {gettext("Copy")}
+              </.button>
+            </div>
+          </div>
+
           <%!-- Field list header + Add button (left-aligned) --%>
           <h3 class="font-medium mb-3">{gettext("Fields on the join form")}</h3>
           <div class="relative mb-3 w-fit" phx-click-away="hide_add_field_dropdown">
@@ -796,6 +824,16 @@ defmodule MvWeb.GlobalSettingsLive do
 
   # ---- Join form event handlers ----
 
+  @impl true
+  def handle_event("copy_join_url", _params, socket) do
+    socket =
+      socket
+      |> push_event("copy_to_clipboard", %{text: socket.assigns.join_url})
+      |> put_flash(:success, gettext("Join page URL copied to clipboard."))
+
+    {:noreply, socket}
+  end
+
   @impl true
   def handle_event("toggle_join_form_enabled", _params, socket) do
     socket = assign(socket, :join_form_enabled, not socket.assigns.join_form_enabled)