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>

create_ticket_api.php

@@ -234,12 +234,16 @@ $priorityColors = [
     "4" => 6736490   // --priority-4: #66bb6a
 ];
 
+$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';
+$host = $_SERVER['HTTP_HOST'] ?? 't.lotusguild.org';
+$ticketUrl = "{$protocol}://{$host}/ticket/{$ticket_id}";
+
 $discord_data = [
     "content" => "",
     "embeds" => [[
         "title" => "New Ticket Created: #" . $ticket_id,
         "description" => $title,
-        "url" => "http://t.lotusguild.org/ticket/" . $ticket_id,
+        "url" => $ticketUrl,
         "color" => $priorityColors[$priority],
         "fields" => [
             ["name" => "Priority", "value" => $priority, "inline" => true],