webui: add dashboard-style theme polish

tests/test_http_api_contract.py

@@ -473,7 +473,7 @@ def test_embedded_webui_preserves_config_input_while_polling():
     assert 'setConfigValue("apSsidInput"' in source
     assert "deviceNameInput" in source
     assert "bmsNameInput" in source
-    assert 'setConfigValue("tempEnabledCount"' in source
+    assert "tempEnabledCount" in source
 
 
 def test_ap_config_can_be_reset_to_defaults():
@@ -500,3 +500,16 @@ def test_embedded_webui_has_consistent_button_intent_styles():
     assert 'class="save" onclick="saveApConfig()"' in source
     assert 'class="danger" onclick="resetApConfig()"' in source
     assert 'class="save" onclick="saveWifi()"' in source
+
+
+def test_embedded_webui_theme_v3():
+    source = firmware_source()
+
+    assert "/* UI theme v3 */" in source
+    assert "--accent:#5f8fcf" in source
+    assert "@media(min-width:980px)" in source
+    assert "#configPage" in source
+    assert "grid-template-columns:190px 1fr" in source
+    assert "button.save" in source
+    assert "button.danger" in source
+    assert "button.secondary" in source