feat: status dots, priority banners, lt-tags, command palette, activity timeline improvements

- Fix DashboardView asset version (was hardcoded 20260327, now uses config ASSET_VERSION)
- Add lt-dot status indicators on dashboard table rows and ticket view toolbar
- Add lt-tag display for Category/Type in ticket read mode (swaps to select in edit mode)
- Add P1/P2 SLA alert banner with elapsed time, progress bar, per-session dismiss
- Wire command palette (Ctrl+K): global nav + admin links via lt.cmdPalette.init()
- Fix cmdPalette.init() call format (flat array, not nested group objects)
- Improve activity timeline: richer formatAction(), better color coding by event type,
  inline status transitions shown in meta row, icon column added

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

views/DashboardView.php

@@ -14,13 +14,14 @@ require_once __DIR__ . '/../middleware/CsrfMiddleware.php';
 $nonce      = SecurityHeadersMiddleware::getNonce();
 $pageTitle  = 'Dashboard';
 $activeNav  = 'dashboard';
-$pageStyles = ['/assets/css/dashboard.css?v=20260327'];
+$_v = $GLOBALS['config']['ASSET_VERSION'] ?? '1';
+$pageStyles = ["/assets/css/dashboard.css?v={$_v}"];
 $pageScripts = [
-    '/assets/js/markdown.js?v=20260327',
-    '/assets/js/dashboard.js?v=20260327',
-    '/assets/js/advanced-search.js?v=20260327',
-    '/assets/js/keyboard-shortcuts.js?v=20260327',
-    '/assets/js/settings.js?v=20260327',
+    "/assets/js/markdown.js?v={$_v}",
+    "/assets/js/dashboard.js?v={$_v}",
+    "/assets/js/advanced-search.js?v={$_v}",
+    "/assets/js/keyboard-shortcuts.js?v={$_v}",
+    "/assets/js/settings.js?v={$_v}",
 ];
 
 // ── Pagination helpers ────────────────────────────────────────────────────────
@@ -431,6 +432,14 @@ include __DIR__ . '/layout_header.php';
                   <td data-label="Category" class="lt-text-muted lt-text-xs"><?= htmlspecialchars($row['category']) ?></td>
                   <td data-label="Type" class="lt-text-muted lt-text-xs"><?= htmlspecialchars($row['type']) ?></td>
                   <td data-label="Status">
+                    <?php $rowDotClass = match($row['status']) {
+                      'Open'        => 'lt-dot-up',
+                      'In Progress' => 'lt-dot-warn',
+                      'Pending'     => 'lt-dot--orange',
+                      'Closed'      => 'lt-dot-idle',
+                      default       => 'lt-dot-idle',
+                    }; ?>
+                    <span class="lt-dot <?= $rowDotClass ?>" aria-hidden="true" style="vertical-align:middle;margin-right:0.3rem"></span>
                     <span class="lt-status lt-status-<?= $rowStatusSlug ?>"><?= htmlspecialchars($row['status']) ?></span>
                   </td>
                   <td data-label="Created By" class="lt-text-xs"><?= $creator ?></td>