Show midnight price change in page title

tests/test_health.py

@@ -37,7 +37,12 @@ def test_home_updates_title_from_latest_price():
 
     assert response.status_code == 200
     assert "new MutationObserver(updateTitleFromPrice)" in response.text
-    assert "document.title = price + ' | BTC Price'" in response.text
+    assert "currentPrice - midnightPrice" in response.text
+    assert "document.title = price + ' | ' + formattedChange" in response.text
+    assert '<h1 class="text-3xl font-bold text-gray-900">BTC Price</h1>' in response.text
+    assert "page-title" not in response.text
+    assert "formatPriceChange(change)" in response.text
+    assert "midnight.setHours(0, 0, 0, 0)" in response.text
 
 
 def test_price_fragment_exposes_formatted_price_for_title():
@@ -46,6 +51,7 @@ def test_price_fragment_exposes_formatted_price_for_title():
     )
 
     assert 'data-title-price="$67.432,10"' in html
+    assert 'data-price-value="67432.1"' in html
     assert ">$67.432,10</p>" in html