Add request logging, bot blocking, and admin log viewer

public/admin.php

@@ -131,6 +131,10 @@ switch ($route) {
         handleGuide($auth, $appConfig);
         break;
 
+    case 'logs':
+        handleLogs($auth, $appConfig);
+        break;
+
     case 'users':
         handleUsers($auth, $appConfig);
         break;
@@ -1451,6 +1455,66 @@ function handleGuide(AdminAuth $auth, array $config): void
     require __DIR__ . '/../admin/templates/layout.php';
 }
 
+function handleLogs(AdminAuth $auth, array $config): void
+{
+    $user = $auth->getCurrentUser();
+    $csrf = $auth->getCsrfToken();
+
+    $activeTab = $_GET['tab'] ?? 'admin';
+    if (!in_array($activeTab, ['admin', 'requests'])) $activeTab = 'admin';
+
+    $adminLogFile = $config['log_file'];
+    $requestLogFile = $config['request_log'];
+
+    // Clear
+    if (isset($_GET['clear'])) {
+        $target = $activeTab === 'admin' ? $adminLogFile : $requestLogFile;
+        @file_put_contents($target, '');
+        $message = $activeTab === 'admin' ? 'Activiteitenlog gewist.' : 'Requestlog gewist.';
+        header('Location: /admin/logs?tab=' . $activeTab);
+        exit;
+    }
+
+    // Download
+    if (isset($_GET['download'])) {
+        $target = $activeTab === 'admin' ? $adminLogFile : $requestLogFile;
+        $filename = $activeTab === 'admin' ? 'admin.log' : 'requests.log';
+        if (file_exists($target)) {
+            header('Content-Type: text/plain');
+            header('Content-Disposition: attachment; filename="' . $filename . '"');
+            header('Content-Length: ' . filesize($target));
+            readfile($target);
+        }
+        exit;
+    }
+
+    // Read admin log
+    $adminLogs = [];
+    if (file_exists($adminLogFile)) {
+        $lines = file($adminLogFile);
+        $lines = array_slice($lines, -200);
+        foreach ($lines as $line) {
+            if (preg_match('/^\[([^\]]+)\] \[([^\]]+)\] \[([^\]]+)\] (.+)$/', trim($line), $m)) {
+                $adminLogs[] = [
+                    'time' => $m[1],
+                    'level' => strtolower($m[2]),
+                    'ip' => $m[3],
+                    'message' => $m[4],
+                ];
+            }
+        }
+        $adminLogs = array_reverse($adminLogs);
+    }
+
+    // Read request log
+    require_once __DIR__ . '/../cms/core/class/RequestLogger.php';
+    $requestLogger = new RequestLogger($requestLogFile);
+    $requestLogs = $requestLogger->getLogs(200);
+
+    $route = 'logs';
+    require __DIR__ . '/../admin/templates/layout.php';
+}
+
 // --- Frontmatter helpers ---
 
 function parseFrontmatterField(string $content, string $key, string $default = ''): string