Fix mobile Today handoff clearance (#1202)

tests/test_mobile_today_command_bar.py

@@ -129,6 +129,15 @@ process.stdout.write(JSON.stringify(values));
     assert result == {"--mobile-today-clearance": "168px"}
 
 
+def test_visible_mobile_today_hud_reserves_measured_scroll_clearance_without_timer_class():
+    css = (FRONTEND / "dashboard.css").read_text()
+
+    assert (
+        'body:has(.mobile-today-hud:not([hidden]):not([data-overlay-hidden="true"])) '
+        "{ padding-bottom:calc(var(--mobile-today-clearance, 166px)"
+    ) in css
+
+
 def test_mobile_command_bar_keeps_primary_actions_visible_and_secondary_actions_modal():
     html = (FRONTEND / "index.html").read_text()
     css = (FRONTEND / "dashboard.css").read_text()