add column and alias are separate

web/templates/pages/admin/table_definition/add_columns.html

@@ -0,0 +1,18 @@
+{# GET /admin/tables/columns/add — crate::pages::admin::table_definition::ui::AddColumnsPage #}
+{% extends "ui/base.html" %}
+
+{% block title %}{{ nav.tr("td-add-columns-title") }}{% endblock %}
+
+{% block content %}
+<main>
+  {% include "pages/admin/table_definition/context.html" %}
+
+  <div id="table-panel" aria-live="polite">
+    {% include "pages/admin/table_definition/add_columns_panel.html" %}
+  </div>
+</main>
+
+<datalist id="currency-codes">
+  {% for code in currency_codes %}<option value="{{ code }}"></option>{% endfor %}
+</datalist>
+{% endblock %}