Fix views/controllers/router: command palette, create form, admin views

- Consolidate the duplicated command palette to a single overlay + init in
  the footer; fix New Ticket to route to /ticket/create (was a 404 /create);
  keep the CSP nonce and all commands
- TicketController create(): trim title, require a non-empty description,
  and honor the posted status (validated against the canonical list) instead
  of silently discarding it
- UserActivityView: 'Active Users' counts only users active in the selected
  range, not every registered user
- layout_footer/DashboardView: local esc() now escapes quotes so values used
  in HTML attributes can't break out
- TicketView: comments tab badge shows the true total, not just page one
- layout_header: gate the 'View activity log' link behind the admin flag
- index.php: validate /admin/user-activity date params; anchor the legacy
  /ticket.php route; align the audit action-type whitelist with the dropdown
- ApiKeysView: correct the external API sample to /create_ticket_api.php

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

views/layout_footer.php

@@ -138,10 +138,13 @@
       var themeBtn = document.getElementById('lt-theme-btn');
       if (themeBtn) themeBtn.addEventListener('click', function() { lt.theme.toggle(); });
 
-      // Command palette — global navigation commands available on all pages
+      // Command palette — single global instance (overlay DOM above; base.js binds Ctrl/Cmd+K)
       var _cpCmds = [
         { id: 'nav-dashboard',   group: 'Navigation', icon: '~', label: 'Dashboard',          kbd: 'G D', action: function() { window.location.href = '/'; } },
         { id: 'nav-new-ticket',  group: 'Navigation', icon: '+', label: 'New Ticket',          kbd: 'N',   action: function() { window.location.href = '/ticket/create'; } },
+        { id: 'filter-mine',        group: 'Filter', icon: '◈', label: 'My Open Tickets',      action: function() { window.location.href = '/?assigned_to=me&status=Open,In+Progress,Pending'; } },
+        { id: 'filter-unassigned',  group: 'Filter', icon: '◌', label: 'Unassigned Tickets',   action: function() { window.location.href = '/?assigned_to=unassigned'; } },
+        { id: 'filter-critical',    group: 'Filter', icon: '!', label: 'P1 Critical Tickets',  action: function() { window.location.href = '/?priority=1'; } },
         { id: 'help-shortcuts',  group: 'Help',       icon: '?', label: 'Keyboard Shortcuts',  kbd: '?',   action: function() { lt.modal.open('lt-keys-help'); } },
         { id: 'help-theme',      group: 'Help',       icon: '*', label: 'Toggle Theme',                    action: function() { lt.theme.toggle(); } },
       ];
@@ -156,7 +159,20 @@
         { id: 'admin-api-keys',   group: 'Admin', icon: 'K', label: 'API Keys',         action: function() { window.location.href = '/admin/api-keys'; } },
       ]);
       <?php endif ?>
+      // Recently viewed tickets from localStorage
+      try {
+        var _recent = JSON.parse(localStorage.getItem('lt_recent_tickets') || '[]');
+        _recent.slice(0, 5).forEach(function(id) {
+          _cpCmds.push({ id: 'recent-' + id, group: 'Recent', icon: '◷', label: 'Ticket #' + id, tags: ['ticket'], action: function(tid) { return function() { window.location.href = '/ticket/' + tid; }; }(id) });
+        });
+      } catch (_e) { /* ignore malformed localStorage */ }
       lt.cmdPalette.init(_cpCmds);
+
+      // Bind the header ⌘K trigger button (no inline onclick — CSP blocks inline handlers)
+      var _cmdTrigger = document.getElementById('lt-cmd-trigger');
+      if (_cmdTrigger) {
+        _cmdTrigger.addEventListener('click', function() { lt.cmdPalette.open(); });
+      }
     }
 
     // Patch lt.api mutating methods to auto-rotate CSRF token when server returns a new one
@@ -194,7 +210,7 @@
         return Math.floor(diff / 86400) + 'd ago';
       }
 
-      function esc(s) { return String(s).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;'); }
+      function esc(s) { return String(s).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/"/g,'&quot;').replace(/'/g,'&#39;'); }
 
       function renderNotifications(data) {
         lt.notif.set(bell, data.unread_count || 0);