refactor: Code cleanup and documentation updates

Bug fixes:
- Fix ticket ID extraction using URLSearchParams instead of split()
- Add error handling for query result in get_users.php
- Make Discord webhook URLs dynamic (use HTTP_HOST)

Code cleanup:
- Remove debug console.log statements from dashboard.js and ticket.js
- Add getTicketIdFromUrl() helper function to both JS files

Documentation:
- Update Claude.md: fix web server (nginx not Apache), add new notes
- Update README.md: add keyboard shortcuts, update setup instructions

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

controllers/TicketController.php

@@ -212,7 +212,9 @@ class TicketController {
         $webhookUrl = $this->envVars['DISCORD_WEBHOOK_URL'];
         
         // Create ticket URL
-        $ticketUrl = "http://t.lotusguild.org/ticket/$ticketId";
+        $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';
+        $host = $_SERVER['HTTP_HOST'] ?? 't.lotusguild.org';
+        $ticketUrl = "{$protocol}://{$host}/ticket/{$ticketId}";
         
         // Map priorities to Discord colors
         $priorityColors = [