test(alerts): the widget test reads the time as |ago writes it (#5510)

Under an hour |ago says "12m 3s ago", so the test looks for the minutes
alone; the reading cell drops an empty class.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

steward/templates/alerts/widget.html

@@ -38,7 +38,7 @@
       <span class="w-sub">{{ rule.resource_name }} · fires on {{ r.condition }}</span>
       {%- endif %}
     </td>
-    <td class="{{ 'tone-crit' if r.label == 'firing' else ('tone-warn' if r.label == 'pending') }}">
+    <td{% if r.label in ("firing", "pending") %} class="{{ 'tone-crit' if r.label == 'firing' else 'tone-warn' }}"{% endif %}>
       {%- if r.label == "no_data" %}—{% else %}{{ metric_value(rule.metric_name, r.value) }}{% endif -%}
     </td>
     <td>{% if r.since %}{{ r.since|ago }}{% else %}—{% endif %}</td>

tests/core/test_alerts_widget.py

@@ -65,9 +65,9 @@ async def test_firing_and_silent_come_first_then_who_acknowledged(app):
     assert re.search(r'w-verdict tone-crit">\s*1 firing, 1 silent, 1 acknowledged\.', page)
     assert page.index("web-1 CPU high") < page.index("nas agent") < page.index("db disk")
     assert 'href="/alerts/history?rule=r1"' in page
-    assert "web-1 · fires on CPU &gt; 90%" in page and "94%" in page and "12m ago" in page
+    assert "web-1 · fires on CPU &gt; 90%" in page and ">94%<" in page and ">12m " in page
     assert "nas · no reading" in page
-    assert "db-1:/var · acknowledged by bryan" in page and "40m ago" in page
+    assert "db-1:/var · acknowledged by bryan <time" in page and ">40m " in page
     assert "+1 rule quiet" in page and 'href="/alerts/"' in page
     assert len(re.findall(r"<th[ >]", page)) == 3
     assert not hex_colours(page), hex_colours(page)