Organize scattered PHP files into scripts/ and tests/ directories

scripts/fix_db.php

@@ -0,0 +1,24 @@
+<?php
+
+require __DIR__ . '/../vendor/autoload.php';
+require __DIR__ . '/../config.php';
+
+use App\Database;
+use App\Models\Category;
+
+$db = Database::getInstance();
+
+$categories = Category::getAll($db);
+
+foreach ($categories as $cat) {
+    $path = Category::getFullPath($db, $cat['id']);
+    if (strpos($path, '[Circular]') !== false) {
+        echo "Circular reference found for category {$cat['id']}: {$cat['name']}\n";
+        // Reset parent_id to null
+        $stmt = $db->prepare('UPDATE categories SET parent_id = NULL WHERE id = :id');
+        $stmt->execute([':id' => $cat['id']]);
+        echo "Fixed by setting parent_id to NULL\n";
+    }
+}
+
+echo "Done checking and fixing circular references.\n";