feat: added Sessionstart to header; changed navlinks in header; rework registration of services; created employee list with refund; created function for getting avatar and insert entry; changed data fetch for user; new style added

header.php

@@ -1,20 +1,29 @@
-   <div class="navbar">
+<?php
+if (session_status() === PHP_SESSION_NONE) {
+    session_start();
+}
+?>
+
+  
+  
+  
+  <div class="navbar">
         <div class="navbar-links" id="mobileMenu">
             <a href="index.php">🏠 Home</a>
             <?php if ($_SESSION['user']['hasRole']): ?>
-                <a href="admin.php">✍️ Eintragung</a>
+                <a href="registration.php">✍️ Eintragung</a>
                 <div class="dropdown">
                     <a href="#">📂 Verwaltung ▼</a>
                     <div class="dropdown-content">
                         <a href="statistik.php">📊 Statistik</a>
                         <a href="lager.php">🔧 Lager</a>
-                        <a href="#">📝 Platzhalter</a>
+                        <a href="personal.php">📝 Personalakten</a>
                     </div>
                 </div>
             <?php endif; ?>
         </div>
         <div class="user-info">
-            <img src="https://cdn.discordapp.com/avatars/<?php echo $_SESSION['user']['id']; ?>/<?php echo $_SESSION['user']['avatar']; ?>.png" alt="Avatar">
+            <img src="https://cdn.discordapp.com/avatars/<?php echo $_SESSION['user']['discord_id']; ?>/<?php echo $_SESSION['user']['avatar']; ?>.png" alt="Avatar">
             <span><?php echo htmlspecialchars($_SESSION['user']['nickname']); ?></span>
             <a href="logout.php"><button class="logout-btn">Logout</button></a>
             <span class="burger" onclick="toggleMenu()">☰</span>