feat(helpdesk): add team workload dashboard with per-agent metrics

New standalone page (helpdesk/team) showing support agent workload
aggregated from BC tickets. KPI bar (open, unassigned, avg age, resolved),
per-agent table sorted by open tickets, period selector (30/90/180/365d).
Global OData query via getTicketsForTeam() without customer filter.
New permission helpdesk.team-workload.view with admin role assignment.
Includes 6 PHPUnit tests for buildTeamWorkloadDashboard().

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

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

@@ -0,0 +1,120 @@
+/**
+ * Team workload dashboard — fetches and renders team metrics.
+ */
+
+const container = document.querySelector('.app-details-container[data-team-workload-url]');
+if (container) {
+  const dataUrl = container.dataset.teamWorkloadUrl;
+  const labelNotAssigned = container.dataset.labelNotAssigned || '—';
+
+  const elLoading = document.getElementById('team-loading');
+  const elError = document.getElementById('team-error');
+  const elEmpty = document.getElementById('team-empty');
+  const elContent = document.getElementById('team-content');
+  const elBody = document.getElementById('team-table-body');
+  const elRefresh = container.querySelector('button[name="team-refresh"]');
+  const periodButtons = container.querySelectorAll('.helpdesk-team-period-button');
+
+  let currentPeriod = 90;
+
+  function showState(state) {
+    if (elLoading) elLoading.hidden = state !== 'loading';
+    if (elError) elError.hidden = state !== 'error';
+    if (elEmpty) elEmpty.hidden = state !== 'empty';
+    if (elContent) elContent.hidden = state !== 'success';
+    if (elLoading) elLoading.setAttribute('aria-busy', state === 'loading' ? 'true' : 'false');
+  }
+
+  function setText(id, value) {
+    const el = document.getElementById(id);
+    if (el) el.textContent = value;
+  }
+
+  function renderKpis(kpis) {
+    setText('team-kpi-open', kpis.open_tickets ?? 0);
+    setText('team-kpi-unassigned', kpis.unassigned ?? 0);
+    setText('team-kpi-avg-age', kpis.avg_age_hours ?? 0);
+    setText('team-kpi-resolved', kpis.resolved_in_period ?? 0);
+  }
+
+  function createCell(text) {
+    const td = document.createElement('td');
+    td.textContent = text;
+    return td;
+  }
+
+  function renderTable(members) {
+    if (!elBody) return;
+    elBody.replaceChildren();
+
+    for (const m of members) {
+      const tr = document.createElement('tr');
+      const isUnassigned = m.support_user === '';
+      const name = isUnassigned ? labelNotAssigned : m.display_name;
+
+      const nameCell = document.createElement('td');
+      nameCell.textContent = name;
+
+      tr.appendChild(nameCell);
+      tr.appendChild(createCell(String(m.open_tickets)));
+      tr.appendChild(createCell(String(m.critical_tickets)));
+      tr.appendChild(createCell(String(m.avg_age_hours)));
+      tr.appendChild(createCell(String(m.resolved_in_period)));
+
+      if (isUnassigned) {
+        tr.classList.add('helpdesk-team-row-unassigned');
+      }
+
+      elBody.appendChild(tr);
+    }
+  }
+
+  async function fetchData(refresh = false) {
+    showState('loading');
+
+    const params = new URLSearchParams({ periodDays: String(currentPeriod) });
+    if (refresh) params.set('refresh', '1');
+
+    try {
+      const res = await fetch(dataUrl + '?' + params.toString(), { credentials: 'same-origin' });
+      const json = await res.json();
+
+      if (!json.ok) {
+        showState('error');
+        return;
+      }
+
+      if (!json.members || json.members.length === 0) {
+        showState('empty');
+        return;
+      }
+
+      renderKpis(json.kpis);
+      renderTable(json.members);
+      showState('success');
+    } catch {
+      showState('error');
+    }
+  }
+
+  for (const button of periodButtons) {
+    button.addEventListener('click', () => {
+      const period = parseInt(button.dataset.period, 10);
+      if (period === currentPeriod) return;
+      currentPeriod = period;
+
+      for (const b of periodButtons) {
+        b.classList.toggle('active', b === button);
+        b.setAttribute('aria-pressed', b === button ? 'true' : 'false');
+      }
+
+      fetchData();
+    });
+  }
+
+  if (elRefresh) {
+    elRefresh.addEventListener('click', () => fetchData(true));
+  }
+
+  fetchData();
+}