Refactored file system

Changed the file system to a more ordered state and updated links in
files accordingly. Also the reffering to files is now uniform

php/save_ticket.php

@@ -0,0 +1,40 @@
+<?php
+if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+    http_response_code(405);
+    echo "Method not allowed";
+    exit;
+}
+
+$title = trim($_POST['title'] ?? '');
+$description = trim($_POST['description'] ?? '');
+$category = $_POST['category'] ?? 'Sonstiges';
+$room = trim($_POST['room'] ?? '');
+$name = trim($_POST['name'] ?? '');
+$date = date("Y-m-d H:i:s");
+
+$newTicket = [
+    'title' => $title,
+    'description' => $description,
+    'category' => $category,
+    'room' => $room,
+    'name' => $name,
+    'status' => 'To-Do',
+    'date' => $date
+];
+
+$ticketsPath = __DIR__ . '../data/tickets.json';
+$tickets = [];
+
+if (file_exists($ticketsPath)) {
+    $json = file_get_contents($ticketsPath);
+    $tickets = json_decode($json, true);
+    if (!is_array($tickets)) $tickets = [];
+}
+
+$tickets[] = $newTicket;
+
+file_put_contents($ticketsPath, json_encode($tickets, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE), LOCK_EX);
+
+// Redirect zurück ins Dashboard oder zur Hauptseite
+header('Location: ../pages/ticket_submit.html?success=1');
+exit;