fix(helpdesk): neutral count badges, bordered tables, critical legend

- Count badge in section title is always neutral (no warning color)
- Critical highlighting only on ticket number, not entire row
- Ticket tables have border + border-radius + subtle header background
  matching the existing table widget pattern
- Legend at bottom explains the warning color when critical tickets exist

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

modules/helpdesk/web/js/helpdesk-team.js

@@ -9,6 +9,7 @@ if (container) {
   const dataUrl = container.dataset.teamWorkloadUrl;
   const labelQueue = container.dataset.labelQueue || 'Queue';
   const labelTickets = container.dataset.labelTickets || 'Tickets';
+  const labelCritical = container.dataset.labelCritical || 'Critical (>48h open)';
 
   const elLoading = document.getElementById('team-loading');
   const elError = document.getElementById('team-error');
@@ -87,9 +88,7 @@ if (container) {
     }
     title.appendChild(document.createTextNode(name));
 
-    const badge = h('span', 'helpdesk-team-title-count', count);
-    if (m.critical_tickets > 0) badge.classList.add('helpdesk-team-title-count-warning');
-    title.appendChild(badge);
+    title.appendChild(h('span', 'helpdesk-team-title-count', count));
     section.appendChild(title);
 
     // Ticket table
@@ -139,6 +138,17 @@ if (container) {
 
     if (queue) elCurrentCards.appendChild(buildAgentWidget(queue, true));
     for (const m of agents) elCurrentCards.appendChild(buildAgentWidget(m, false));
+
+    // Legend
+    const hasCritical = members.some(m => m.critical_tickets > 0);
+    if (hasCritical) {
+      const legend = h('div', 'helpdesk-team-legend');
+      const item = h('span', 'helpdesk-team-legend-item');
+      item.appendChild(h('span', 'helpdesk-team-legend-dot helpdesk-team-legend-dot-warning'));
+      item.appendChild(h('span', '', labelCritical));
+      legend.appendChild(item);
+      elCurrentCards.appendChild(legend);
+    }
   }
 
   function renderPerformanceTab(members) {