feat(alerts): the whole rule row opens the rule (#5214)

The name's link stretches over its row (.row-link / .row-target); the
History and Disable buttons sit above it and keep their own clicks.

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

steward/static/steward.css

@@ -210,6 +210,12 @@ strong, b, th { font-weight: 500; }
 /* The Docker page's one-line answer, above its tiles (#5298). */
 .page-verdict { margin: 0 0 0.75rem; font-size: 0.95rem; }
 .table tr.row-off > td { opacity: 0.55; }
+/* A row that opens as a whole: its one .row-target link stretches over the
+   row, and the actions cell sits above it so its buttons keep their own
+   clicks. One real link per row, so keyboard and screen readers meet it once. */
+.table tr.row-link { position: relative; cursor: pointer; }
+.table tr.row-link .row-target::after { content: ""; position: absolute; inset: 0; }
+.table tr.row-link .td-actions { position: relative; z-index: 1; cursor: auto; }
 .table td.nowrap { white-space: nowrap; }
 .cell-note { font-size: 0.78rem; color: var(--text-muted); margin-top: 0.2rem; }
 /* An alert episode's own transitions, folded under it (#5316). */

steward/templates/alerts/list.html

@@ -1,7 +1,8 @@
 {# alerts/list.html — the Alerts page (#5315): the verdict and what is active
    (alerts/_active.html, polled), then every rule: what it is doing now and
-   when it last fired, what it fires on, and its History and Disable. A rule's
-   name opens it; deleting one is on its own page, behind the confirm dialog. #}
+   when it last fired, what it fires on, and its History and Disable. The
+   whole row opens the rule (.row-link, its name is the link); deleting one is
+   on its own page, behind the confirm dialog. #}
 {% extends "base.html" %}
 {% block title %}Alerts — Steward{% endblock %}
 {% from "_macros.html" import page_header, status_badge, empty_state %}
@@ -36,9 +37,9 @@
         <tbody>
             {% for rule in rules %}
             {% set fired = (last_fired or {}).get(rule.id) %}
-            <tr{% if not rule.enabled %} class="row-off"{% endif %}>
+            <tr class="row-link{% if not rule.enabled %} row-off{% endif %}">
                 <td class="cell-name">
-                  <a href="{{ ('/alerts/rules/' ~ rule.id ~ '/edit') if can_edit else ('/alerts/history?rule=' ~ rule.id) }}" title="{{ rule.name }}">{{ rule.name }}</a>
+                  <a class="row-target" href="{{ ('/alerts/rules/' ~ rule.id ~ '/edit') if can_edit else ('/alerts/history?rule=' ~ rule.id) }}" title="{{ rule.name }}">{{ rule.name }}</a>
                   <div class="cell-sub">{{ source_label(rule.source_module) }}</div>
                 </td>
                 <td>