diff --git a/assets/js/dashboard.js b/assets/js/dashboard.js
index 7f8b96f..68af2aa 100644
--- a/assets/js/dashboard.js
+++ b/assets/js/dashboard.js
@@ -545,6 +545,8 @@ function performBulkCloseAction(ticketIds) {
     });
 }
 
+var _bulkAssignUserId = null; // set by combobox onSelect
+
 function showBulkAssignModal() {
     const ticketIds = getSelectedTicketIds();
 
@@ -553,7 +555,8 @@ function showBulkAssignModal() {
         return;
     }
 
-    // Create modal HTML
+    _bulkAssignUserId = null;
+
     const modalHtml = `
         <div class="lt-modal-overlay" id="bulkAssignModal" aria-hidden="true" role="dialog" aria-modal="true" aria-labelledby="bulkAssignModalTitle">
             <div class="lt-modal">
@@ -562,10 +565,15 @@ function showBulkAssignModal() {
                     <button class="lt-modal-close" data-modal-close aria-label="Close">✕</button>
                 </div>
                 <div class="lt-modal-body">
-                    <label for="bulkAssignUser">Assign to:</label>
-                    <select id="bulkAssignUser" class="lt-select">
-                        <option value="">Select User...</option>
-                    </select>
+                    <label class="lt-label">Assign to:</label>
+                    <div class="lt-combobox" id="bulkAssignCombobox">
+                        <div class="lt-combobox-input-wrap">
+                            <input type="text" class="lt-combobox-input" id="bulkAssignUserInput"
+                                   placeholder="Search users…" autocomplete="off" aria-label="Search users">
+                        </div>
+                        <ul class="lt-combobox-list" role="listbox" aria-hidden="true"></ul>
+                    </div>
+                    <span class="lt-field-hint lt-text-muted">Type to search — supports large user lists</span>
                 </div>
                 <div class="lt-modal-footer">
                     <button data-action="perform-bulk-assign" class="lt-btn lt-btn-primary">ASSIGN</button>
@@ -578,19 +586,18 @@ function showBulkAssignModal() {
     document.body.insertAdjacentHTML('beforeend', modalHtml);
     lt.modal.open('bulkAssignModal');
 
-    // Fetch users for the dropdown
     lt.api.get('/api/get_users.php')
         .then(data => {
             if (data.success && data.users) {
-                const select = document.getElementById('bulkAssignUser');
-                if (select) {
-                    data.users.forEach(user => {
-                        const option = document.createElement('option');
-                        option.value = user.user_id;
-                        option.textContent = user.display_name || user.username;
-                        select.appendChild(option);
-                    });
-                }
+                const input = document.getElementById('bulkAssignUserInput');
+                if (!input) return;
+                const items = data.users.map(u => ({
+                    value: String(u.user_id),
+                    label: u.display_name || u.username
+                }));
+                lt.combobox.init(input, items, {
+                    onSelect: function(item) { _bulkAssignUserId = item.value; }
+                });
             }
         })
         .catch(() => lt.toast.error('Error loading users'));
@@ -603,11 +610,11 @@ function closeBulkAssignModal() {
 }
 
 function performBulkAssign() {
-    const userId = document.getElementById('bulkAssignUser').value;
+    const userId = _bulkAssignUserId;
     const ticketIds = getSelectedTicketIds();
 
     if (!userId) {
-        lt.toast.warning('Please select a user', 2000);
+        lt.toast.warning('Please select a user from the list', 2000);
         return;
     }
 
@@ -997,10 +1004,14 @@ function performQuickStatusChange(ticketId) {
     });
 }
 
+var _quickAssignUserId = undefined; // undefined = no change; null = unassign; string = user_id
+
 /**
  * Quick assign from dashboard
  */
 function quickAssign(ticketId) {
+    _quickAssignUserId = undefined;
+
     const modalHtml = `
         <div class="lt-modal-overlay" id="quickAssignModal" aria-hidden="true" role="dialog" aria-modal="true" aria-labelledby="quickAssignModalTitle">
             <div class="lt-modal lt-modal-xs">
@@ -1009,14 +1020,18 @@ function quickAssign(ticketId) {
                     <button class="lt-modal-close" data-modal-close aria-label="Close">✕</button>
                 </div>
                 <div class="lt-modal-body">
-                    <p class="lt-mb-xs">Ticket #${lt.escHtml(ticketId)}</p>
-                    <label for="quickAssignSelect">Assign to:</label>
-                    <select id="quickAssignSelect" class="lt-select">
-                        <option value="">Unassigned</option>
-                    </select>
+                    <p class="lt-mb-xs lt-text-muted lt-text-xs">Ticket #${lt.escHtml(String(ticketId))}</p>
+                    <label class="lt-label">Assign to:</label>
+                    <div class="lt-combobox" id="quickAssignCombobox">
+                        <div class="lt-combobox-input-wrap">
+                            <input type="text" class="lt-combobox-input" id="quickAssignInput"
+                                   placeholder="Search users…" autocomplete="off" aria-label="Search users">
+                        </div>
+                        <ul class="lt-combobox-list" role="listbox" aria-hidden="true"></ul>
+                    </div>
                 </div>
                 <div class="lt-modal-footer">
-                    <button data-action="perform-quick-assign" data-ticket-id="${ticketId}" class="lt-btn lt-btn-primary">ASSIGN</button>
+                    <button data-action="perform-quick-assign" data-ticket-id="${lt.escHtml(String(ticketId))}" class="lt-btn lt-btn-primary">ASSIGN</button>
                     <button data-action="close-quick-assign-modal" class="lt-btn lt-btn-ghost">CANCEL</button>
                 </div>
             </div>
@@ -1026,16 +1041,20 @@ function quickAssign(ticketId) {
     document.body.insertAdjacentHTML('beforeend', modalHtml);
     lt.modal.open('quickAssignModal');
 
-    // Load users
     lt.api.get('/api/get_users.php')
         .then(data => {
             if (data.success && data.users) {
-                const select = document.getElementById('quickAssignSelect');
-                data.users.forEach(user => {
-                    const option = document.createElement('option');
-                    option.value = user.user_id;
-                    option.textContent = user.display_name || user.username;
-                    select.appendChild(option);
+                const input = document.getElementById('quickAssignInput');
+                if (!input) return;
+                const items = [
+                    { value: '', label: 'Unassigned' },
+                    ...data.users.map(u => ({
+                        value: String(u.user_id),
+                        label: u.display_name || u.username
+                    }))
+                ];
+                lt.combobox.init(input, items, {
+                    onSelect: function(item) { _quickAssignUserId = item.value || null; }
                 });
             }
         })
@@ -1049,7 +1068,11 @@ function closeQuickAssignModal() {
 }
 
 function performQuickAssign(ticketId) {
-    const assignedTo = document.getElementById('quickAssignSelect').value || null;
+    if (_quickAssignUserId === undefined) {
+        lt.toast.warning('Please select a user from the list', 2000);
+        return;
+    }
+    const assignedTo = _quickAssignUserId;
 
     lt.api.post('/api/assign_ticket.php', { ticket_id: ticketId, assigned_to: assignedTo })
     .then(data => {
diff --git a/views/DashboardView.php b/views/DashboardView.php
index fcb2044..01e3780 100644
--- a/views/DashboardView.php
+++ b/views/DashboardView.php
@@ -857,7 +857,9 @@ document.querySelectorAll('.lt-stat-card').forEach(function (card) {
     });
 });
 
-// Event delegation for click actions
+// Event delegation for click actions — only handles cases NOT covered by dashboard.js
+// bulk-*, navigate, view-ticket, quick-*, set-view-mode, clear-selection, toggle-*
+// are all handled by dashboard.js to avoid double-firing (duplicate handlers = duplicate users in selects).
 document.addEventListener('click', function (e) {
     var target = e.target.closest('[data-action]');
     if (!target) return;
@@ -870,19 +872,8 @@ document.addEventListener('click', function (e) {
         case 'open-advanced-search':  openAdvancedSearch();                           break;
         case 'close-advanced-search': closeAdvancedSearch();                          break;
         case 'reset-advanced-search': resetAdvancedSearch();                          break;
-        case 'set-view-mode':         setViewMode(target.getAttribute('data-mode')); break;
-        case 'navigate':              window.location.href = target.getAttribute('data-url'); break;
         case 'toggle-export-menu':    e.stopPropagation(); toggleExportMenu(e);       break;
         case 'export-tickets':        e.preventDefault(); exportSelectedTickets(target.getAttribute('data-format')); break;
-        case 'bulk-status':           showBulkStatusModal();                          break;
-        case 'bulk-assign':           showBulkAssignModal();                          break;
-        case 'bulk-priority':         showBulkPriorityModal();                        break;
-        case 'clear-selection':       clearSelection();                               break;
-        case 'toggle-select-all':     toggleSelectAll();                              break;
-        case 'toggle-row-checkbox':   toggleRowCheckbox(e, target);                   break;
-        case 'view-ticket':           e.stopPropagation(); window.location.href = '/ticket/' + target.getAttribute('data-ticket-id'); break;
-        case 'quick-status':          e.stopPropagation(); quickStatusChange(target.getAttribute('data-ticket-id'), target.getAttribute('data-status')); break;
-        case 'quick-assign':          e.stopPropagation(); quickAssign(target.getAttribute('data-ticket-id')); break;
         case 'save-filter':           saveCurrentFilter();                            break;
         case 'delete-filter':         deleteSavedFilter();                            break;
         case 'remove-filter':         removeFilter(target.getAttribute('data-filter-type'), target.getAttribute('data-filter-value')); break;