Dropdown placeholders use "Select..." with disabled+hidden

The default empty option in <select> fields is "Select..."
instead of "-- Select --". The option is disabled, selected,
and hidden so users can't re-select it after making a choice.
Follows the standard UX pattern for placeholder options in
modern forms.

Author: audreyfeldroy

src/airform/forms.py

@@ -285,7 +285,7 @@ def default_form_widget(
         elif input_type == "select":
             options = _get_options(annotation, meta)
             parts.append(f"  <select{_attr_str(input_attrs)}>")
-            parts.append('    <option value="">-- Select --</option>')
+            parts.append('    <option value="" disabled selected hidden>Select...</option>')
             for opt_val, opt_label in options:
                 sel = " selected" if value is not None and str(value) == opt_val else ""
                 parts.append(f'    <option value="{escape(opt_val)}"{sel}>{escape(opt_label)}</option>')

tests/test_airform.py

@@ -384,7 +384,7 @@ class CompanionForm(AirForm[CompanionModel]):
     assert "<select" in html
     assert '<option value="tank">The One Who Gets Hit</option>' in html
     assert '<option value="bard">The One With Snacks</option>' in html
-    assert '<option value="">-- Select --</option>' in html
+    assert "Select...</option>" in html
 
 
 def test_render_airfield_choices_with_selected() -> None: