Fix case sensitivity in app folders

app/Core/Database.php

@@ -1,46 +0,0 @@
-<?php
-/**
- * Simple PDO Database Wrapper
- */
-
-declare(strict_types=1);
-
-namespace App\Core;
-
-use PDO;
-use PDOException;
-
-final class Database
-{
-    private static ?PDO $instance = null;
-
-    public static function getInstance(): PDO
-    {
-        if (self::$instance === null) {
-            $config = require APP_PATH . '/config/database.php';
-            
-            $dsn = sprintf(
-                "mysql:host=%s;port=%s;dbname=%s;charset=%s",
-                $config['host'],
-                $config['port'],
-                $config['database'],
-                $config['charset']
-            );
-
-            try {
-                self::$instance = new PDO($dsn, $config['username'], $config['password'], [
-                    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
-                    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
-                    PDO::ATTR_EMULATE_PREPARES   => false,
-                ]);
-            } catch (PDOException $e) {
-                http_response_code(500);
-                header('Content-Type: application/json');
-                echo json_encode(['success' => false, 'message' => 'Database connection failed']);
-                exit;
-            }
-        }
-
-        return self::$instance;
-    }
-}