diff --git a/api/export_tickets.php b/api/export_tickets.php
index 3cca27f..36b0d44 100644
--- a/api/export_tickets.php
+++ b/api/export_tickets.php
@@ -47,13 +47,31 @@ try {
     $type = isset($_GET['type']) ? $_GET['type'] : null;
     $search = isset($_GET['search']) ? trim($_GET['search']) : null;
     $format = isset($_GET['format']) ? $_GET['format'] : 'csv';
+    $ticketIds = isset($_GET['ticket_ids']) ? $_GET['ticket_ids'] : null;
 
     // Initialize model
     $ticketModel = new TicketModel($conn);
 
-    // Get all tickets (no pagination for export)
-    $result = $ticketModel->getAllTickets(1, 10000, $status, 'created_at', 'desc', $category, $type, $search);
-    $tickets = $result['tickets'];
+    // Check if specific ticket IDs are provided
+    if ($ticketIds) {
+        // Parse and validate ticket IDs
+        $ticketIdArray = array_filter(array_map('trim', explode(',', $ticketIds)));
+        if (empty($ticketIdArray)) {
+            header('Content-Type: application/json');
+            http_response_code(400);
+            echo json_encode(['success' => false, 'error' => 'No valid ticket IDs provided']);
+            exit;
+        }
+
+        // Get specific tickets by IDs
+        $tickets = $ticketModel->getTicketsByIds($ticketIdArray);
+        // Convert associative array to indexed array
+        $tickets = array_values($tickets);
+    } else {
+        // Get all tickets with filters (no pagination for export)
+        $result = $ticketModel->getAllTickets(1, 10000, $status, 'created_at', 'desc', $category, $type, $search);
+        $tickets = $result['tickets'];
+    }
 
     if ($format === 'csv') {
         // CSV Export
diff --git a/api/get_users.php b/api/get_users.php
index 83f367b..b651ec2 100644
--- a/api/get_users.php
+++ b/api/get_users.php
@@ -34,8 +34,8 @@ try {
 
     header('Content-Type: application/json');
 
-    // Get all active users for mentions
-    $sql = "SELECT user_id, username, display_name FROM users WHERE is_active = 1 ORDER BY display_name, username";
+    // Get all users for mentions/assignment
+    $sql = "SELECT user_id, username, display_name FROM users ORDER BY display_name, username";
     $result = $conn->query($sql);
 
     $users = [];
diff --git a/api/ticket_dependencies.php b/api/ticket_dependencies.php
index 6bd6f51..b603d63 100644
--- a/api/ticket_dependencies.php
+++ b/api/ticket_dependencies.php
@@ -47,11 +47,16 @@ if ($conn->connect_error) {
     ResponseHelper::serverError('Database connection failed');
 }
 
-$dependencyModel = new DependencyModel($conn);
-$auditLog = new AuditLogModel($conn);
+try {
+    $dependencyModel = new DependencyModel($conn);
+    $auditLog = new AuditLogModel($conn);
+} catch (Exception $e) {
+    ResponseHelper::serverError('Failed to initialize models: ' . $e->getMessage());
+}
 
 $method = $_SERVER['REQUEST_METHOD'];
 
+try {
 switch ($method) {
     case 'GET':
         // Get dependencies for a ticket
@@ -139,5 +144,8 @@ switch ($method) {
     default:
         ResponseHelper::error('Method not allowed', 405);
 }
+} catch (Exception $e) {
+    ResponseHelper::serverError('An error occurred: ' . $e->getMessage());
+}
 
 $conn->close();
diff --git a/api/upload_attachment.php b/api/upload_attachment.php
index 9a2b359..4c03561 100644
--- a/api/upload_attachment.php
+++ b/api/upload_attachment.php
@@ -31,8 +31,8 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
         ResponseHelper::error('Ticket ID is required');
     }
 
-    // Validate ticket ID format
-    if (!preg_match('/^[A-Z]{3}\d{6}$/', $ticketId)) {
+    // Validate ticket ID format (9-digit number)
+    if (!preg_match('/^\d{9}$/', $ticketId)) {
         ResponseHelper::error('Invalid ticket ID format');
     }
 
@@ -72,8 +72,8 @@ if (empty($ticketId)) {
     ResponseHelper::error('Ticket ID is required');
 }
 
-// Validate ticket ID format
-if (!preg_match('/^[A-Z]{3}\d{6}$/', $ticketId)) {
+// Validate ticket ID format (9-digit number)
+if (!preg_match('/^\d{9}$/', $ticketId)) {
     ResponseHelper::error('Invalid ticket ID format');
 }
 
diff --git a/assets/css/dashboard.css b/assets/css/dashboard.css
index 3d1bcd2..9bf7d28 100644
--- a/assets/css/dashboard.css
+++ b/assets/css/dashboard.css
@@ -3149,7 +3149,8 @@ tr:hover .quick-actions {
     box-shadow: 0 0 10px rgba(0, 255, 65, 0.3);
 }
 
-.export-dropdown:hover .export-dropdown-content {
+.export-dropdown:hover .export-dropdown-content,
+.export-dropdown.open .export-dropdown-content {
     display: block;
 }
 
diff --git a/assets/js/dashboard.js b/assets/js/dashboard.js
index 5469563..97331ec 100644
--- a/assets/js/dashboard.js
+++ b/assets/js/dashboard.js
@@ -117,7 +117,10 @@ function initSettingsModal() {
     if (settingsIcon) {
         settingsIcon.addEventListener('click', function(e) {
             e.preventDefault();
-            createSettingsModal();
+            // openSettingsModal is defined in settings.js
+            if (typeof openSettingsModal === 'function') {
+                openSettingsModal();
+            }
         });
     }
 }
@@ -482,6 +485,8 @@ function updateSelectionCount() {
     const count = checkboxes.length;
     const toolbar = document.querySelector('.bulk-actions-inline');
     const countDisplay = document.getElementById('selected-count');
+    const exportDropdown = document.getElementById('exportDropdown');
+    const exportCount = document.getElementById('exportCount');
 
     if (toolbar && countDisplay) {
         if (count > 0) {
@@ -491,6 +496,16 @@ function updateSelectionCount() {
             toolbar.style.display = 'none';
         }
     }
+
+    // Show/hide export dropdown based on selection
+    if (exportDropdown) {
+        if (count > 0) {
+            exportDropdown.style.display = '';
+            if (exportCount) exportCount.textContent = count;
+        } else {
+            exportDropdown.style.display = 'none';
+        }
+    }
 }
 
 function getSelectedTicketIds() {
@@ -1339,3 +1354,47 @@ function performQuickAssign(ticketId) {
         toast.error('Error updating assignment', 4000);
     });
 }
+
+/**
+ * Toggle export dropdown menu
+ */
+function toggleExportMenu(event) {
+    event.stopPropagation();
+    const dropdown = document.getElementById('exportDropdown');
+    const content = document.getElementById('exportDropdownContent');
+    if (dropdown && content) {
+        dropdown.classList.toggle('open');
+    }
+}
+
+// Close export dropdown when clicking outside
+document.addEventListener('click', function(event) {
+    const dropdown = document.getElementById('exportDropdown');
+    if (dropdown && !dropdown.contains(event.target)) {
+        dropdown.classList.remove('open');
+    }
+});
+
+/**
+ * Export selected tickets to CSV or JSON
+ */
+function exportSelectedTickets(format) {
+    const ticketIds = getSelectedTicketIds();
+
+    if (ticketIds.length === 0) {
+        toast.warning('No tickets selected', 2000);
+        return;
+    }
+
+    // Build URL with selected ticket IDs
+    const params = new URLSearchParams();
+    params.set('format', format);
+    params.set('ticket_ids', ticketIds.join(','));
+
+    // Trigger download
+    window.location.href = '/api/export_tickets.php?' + params.toString();
+
+    // Close dropdown
+    const dropdown = document.getElementById('exportDropdown');
+    if (dropdown) dropdown.classList.remove('open');
+}
diff --git a/assets/js/ticket.js b/assets/js/ticket.js
index a936c60..8640a5d 100644
--- a/assets/js/ticket.js
+++ b/assets/js/ticket.js
@@ -579,20 +579,39 @@ function loadDependencies() {
     const ticketId = window.ticketData.id;
 
     fetch(`/api/ticket_dependencies.php?ticket_id=${ticketId}`)
-        .then(response => response.json())
+        .then(response => {
+            if (!response.ok) {
+                throw new Error(`HTTP ${response.status}`);
+            }
+            return response.json();
+        })
         .then(data => {
             if (data.success) {
                 renderDependencies(data.dependencies);
                 renderDependents(data.dependents);
             } else {
                 console.error('Error loading dependencies:', data.error);
+                showDependencyError(data.error || 'Failed to load dependencies');
             }
         })
         .catch(error => {
             console.error('Error loading dependencies:', error);
+            showDependencyError('Failed to load dependencies. The feature may not be available.');
         });
 }
 
+function showDependencyError(message) {
+    const dependenciesList = document.getElementById('dependenciesList');
+    const dependentsList = document.getElementById('dependentsList');
+
+    if (dependenciesList) {
+        dependenciesList.innerHTML = `<p style="color: var(--terminal-amber);">${escapeHtml(message)}</p>`;
+    }
+    if (dependentsList) {
+        dependentsList.innerHTML = `<p style="color: var(--terminal-amber);">${escapeHtml(message)}</p>`;
+    }
+}
+
 function renderDependencies(dependencies) {
     const container = document.getElementById('dependenciesList');
     if (!container) return;
diff --git a/views/DashboardView.php b/views/DashboardView.php
index 7cf6aed..69942ca 100644
--- a/views/DashboardView.php
+++ b/views/DashboardView.php
@@ -264,11 +264,11 @@
         <!-- Center: Actions + Count -->
         <div class="toolbar-center">
             <button onclick="window.location.href='<?php echo $GLOBALS['config']['BASE_URL']; ?>/ticket/create'" class="btn create-ticket">+ New Ticket</button>
-            <div class="export-dropdown">
-                <button class="btn">↓ Export</button>
-                <div class="export-dropdown-content">
-                    <a href="/api/export_tickets.php?format=csv<?php echo isset($_GET['status']) ? '&status=' . urlencode($_GET['status']) : ''; ?><?php echo isset($_GET['category']) ? '&category=' . urlencode($_GET['category']) : ''; ?>">CSV</a>
-                    <a href="/api/export_tickets.php?format=json<?php echo isset($_GET['status']) ? '&status=' . urlencode($_GET['status']) : ''; ?><?php echo isset($_GET['category']) ? '&category=' . urlencode($_GET['category']) : ''; ?>">JSON</a>
+            <div class="export-dropdown" id="exportDropdown" style="display: none;">
+                <button class="btn" onclick="toggleExportMenu(event)">↓ Export Selected (<span id="exportCount">0</span>)</button>
+                <div class="export-dropdown-content" id="exportDropdownContent">
+                    <a href="#" onclick="exportSelectedTickets('csv'); return false;">CSV</a>
+                    <a href="#" onclick="exportSelectedTickets('json'); return false;">JSON</a>
                 </div>
             </div>
             <span class="ticket-count">Total: <?php echo $totalTickets; ?></span>