feat: Implement floors, locations, and racks management

- Added list, edit, and save functionalities for floors, locations, and racks.
- Enhanced UI with search and filter options for better usability.
- Implemented SVG upload for floor plans in the floors module.
- Added validation for required fields in the save processes.
- Improved navigation in the header to reflect new modules.
- Styled forms and tables for a consistent look and feel across modules.

app/templates/header.php

@@ -27,35 +27,34 @@
     <h1>Netzwerk-Dokumentation</h1>
 
     <?php
-    $currentPath = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
+    $currentModule = $_GET['module'] ?? 'dashboard';
 
     $navItems = [
-        '/' => 'Dashboard',
-        '/device-types' => 'Gerätetypen',
-        '/devices' => 'Geräte',
-        '/racks' => 'Racks',
-        '/floors' => 'Grundrisse',
-        '/connections' => 'Verbindungen',
+        'dashboard' => 'Dashboard',
+        'locations' => 'Standorte',
+        'buildings' => 'Gebäude',
+        'device_types' => 'Gerätetypen',
+        'devices' => 'Geräte',
+        'racks' => 'Racks',
+        'floors' => 'Stockwerke',
+        'connections' => 'Verbindungen',
     ];
     ?>
 
     <nav class="main-nav">
         <ul>
-            <?php foreach ($navItems as $url => $label): ?>
+            <?php foreach ($navItems as $module => $label): ?>
                 <?php
-                    $active = ($currentPath === $url || str_starts_with($currentPath, $url . '/'))
-                        ? 'active'
-                        : '';
+                    $active = ($currentModule === $module) ? 'active' : '';
                 ?>
                 <li class="<?= $active ?>">
-                    <a href="<?= htmlspecialchars($url) ?>">
-                        <?= htmlspecialchars($label) ?>
+                    <a href="?module=<?= $module ?>&action=list">
+                        <?= $label ?>
                     </a>
                 </li>
             <?php endforeach; ?>
         </ul>
     </nav>
-
 </header>
 
 <main>