Add lt.autoRefresh, fix showToast in admin, clean up inline styles

- Replace all 8 showToast() calls in ApiKeysView.php with lt.toast.*
  — all toast calls in the codebase now use lt.toast directly
- Add .duplicate-list, .duplicate-meta, .duplicate-hint CSS classes to
  dashboard.css; replace inline styles in duplicate detection JS with them
- Add dashboardAutoRefresh() using lt.autoRefresh — reloads page every
  5 minutes, skipping if a modal is open or user is typing in an input
- Add REFRESH button to dashboard header that triggers lt.autoRefresh.now()
  for immediate manual refresh with timer restart

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

views/CreateTicketView.php

@@ -295,18 +295,18 @@ $nonce = SecurityHeadersMiddleware::getNonce();
                 const listDiv = document.getElementById('duplicatesList');
 
                 if (data.success && data.duplicates && data.duplicates.length > 0) {
-                    let html = '<ul style="margin: 0; padding-left: 1.5rem; color: var(--terminal-green);">';
+                    let html = '<ul class="duplicate-list">';
                     data.duplicates.forEach(dup => {
-                        html += `<li style="margin-bottom: 0.5rem;">
-                            <a href="/ticket/${escapeHtml(dup.ticket_id)}" target="_blank" style="color: var(--terminal-green);">
+                        html += `<li>
+                            <a href="/ticket/${escapeHtml(dup.ticket_id)}" target="_blank">
                                 #${escapeHtml(dup.ticket_id)}
                             </a>
                             - ${escapeHtml(dup.title)}
-                            <span style="color: var(--terminal-amber);">(${dup.similarity}% match, ${escapeHtml(dup.status)})</span>
+                            <span class="duplicate-meta">(${dup.similarity}% match, ${escapeHtml(dup.status)})</span>
                         </li>`;
                     });
                     html += '</ul>';
-                    html += '<p style="margin-top: 0.5rem; font-size: 0.85rem; color: var(--terminal-green-dim);">Consider checking these tickets before creating a new one.</p>';
+                    html += '<p class="duplicate-hint">Consider checking these tickets before creating a new one.</p>';
 
                     listDiv.innerHTML = html;
                     warningDiv.style.display = 'block';