Feature 5: Implement Bulk Actions (Admin Only)

Add comprehensive bulk operations system for admins:

- Created BulkOperationsModel.php with operation tracking and processing
- Added bulk_operation.php API endpoint for bulk operations
- Created get_users.php API endpoint for user dropdown in bulk assign
- Updated DashboardView.php with checkboxes and bulk actions toolbar
- Added JavaScript functions for:
  - Select all/clear selection
  - Bulk close tickets
  - Bulk assign tickets
  - Bulk change priority
- Added comprehensive CSS for bulk actions toolbar and modals
- All bulk operations are admin-only (enforced server-side)
- Operations tracked in bulk_operations table with audit logging
- Supports bulk_close, bulk_assign, and bulk_priority operations

Admins can now select multiple tickets and perform batch operations, significantly improving workflow efficiency.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

api/get_users.php

@@ -0,0 +1,33 @@
+<?php
+session_start();
+require_once dirname(__DIR__) . '/config/db.php';
+require_once dirname(__DIR__) . '/models/UserModel.php';
+
+header('Content-Type: application/json');
+
+// Check authentication
+if (!isset($_SESSION['user']) || !isset($_SESSION['user']['user_id'])) {
+    echo json_encode(['success' => false, 'error' => 'Not authenticated']);
+    exit;
+}
+
+// Create database connection
+$conn = new mysqli(
+    $GLOBALS['config']['DB_HOST'],
+    $GLOBALS['config']['DB_USER'],
+    $GLOBALS['config']['DB_PASS'],
+    $GLOBALS['config']['DB_NAME']
+);
+
+if ($conn->connect_error) {
+    echo json_encode(['success' => false, 'error' => 'Database connection failed']);
+    exit;
+}
+
+// Get all users
+$userModel = new UserModel($conn);
+$users = $userModel->getAllUsers();
+
+$conn->close();
+
+echo json_encode(['success' => true, 'users' => $users]);