fix: Add missing API routes to index.php

Added routes for all API endpoints that were missing:
- ticket_dependencies, upload_attachment, delete_attachment
- get_users, assign_ticket, get_template
- bulk_operation, export_tickets
- generate_api_key, revoke_api_key
- manage_templates, manage_workflows, manage_recurring
- check_duplicates

This fixes the 500/404 errors on Dependencies tab and other API calls.

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

index.php

@@ -82,6 +82,62 @@ switch (true) {
         require_once 'api/add_comment.php';
         break;
 
+    case $requestPath == '/api/ticket_dependencies.php':
+        require_once 'api/ticket_dependencies.php';
+        break;
+
+    case $requestPath == '/api/upload_attachment.php':
+        require_once 'api/upload_attachment.php';
+        break;
+
+    case $requestPath == '/api/delete_attachment.php':
+        require_once 'api/delete_attachment.php';
+        break;
+
+    case $requestPath == '/api/get_users.php':
+        require_once 'api/get_users.php';
+        break;
+
+    case $requestPath == '/api/assign_ticket.php':
+        require_once 'api/assign_ticket.php';
+        break;
+
+    case $requestPath == '/api/get_template.php':
+        require_once 'api/get_template.php';
+        break;
+
+    case $requestPath == '/api/bulk_operation.php':
+        require_once 'api/bulk_operation.php';
+        break;
+
+    case $requestPath == '/api/export_tickets.php':
+        require_once 'api/export_tickets.php';
+        break;
+
+    case $requestPath == '/api/generate_api_key.php':
+        require_once 'api/generate_api_key.php';
+        break;
+
+    case $requestPath == '/api/revoke_api_key.php':
+        require_once 'api/revoke_api_key.php';
+        break;
+
+    case $requestPath == '/api/manage_templates.php':
+        require_once 'api/manage_templates.php';
+        break;
+
+    case $requestPath == '/api/manage_workflows.php':
+        require_once 'api/manage_workflows.php';
+        break;
+
+    case $requestPath == '/api/manage_recurring.php':
+        require_once 'api/manage_recurring.php';
+        break;
+
+    case $requestPath == '/api/check_duplicates.php':
+        require_once 'api/check_duplicates.php';
+        break;
+
     // Admin Routes - require admin privileges
     case $requestPath == '/admin/recurring-tickets':
         if (!$currentUser || !$currentUser['is_admin']) {