fix: resolve 500 error caused by extra brace in index.php and missing Db::connect method

public/index.php

@@ -509,7 +509,6 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
         }
     }
 }
-}
 
 // Fetch All Data
 $projects = $pdo->query('SELECT * FROM dc_projects ORDER BY name ASC')->fetchAll();

src/Core/Db.php

@@ -12,8 +12,8 @@ class Db
     public static function init(array $config): PDO
     {
         if (self::$instance === null) {
-            $dbCfg = $config['db'];
-            $dsn = sprintf('mysql:host=%s;dbname=%s;charset=%s', $dbCfg['host'], $dbCfg['dbname'], $dbCfg['charset']);
+            $dbCfg = isset($config['db']) ? $config['db'] : $config;
+            $dsn = sprintf('mysql:host=%s;dbname=%s;charset=%s', $dbCfg['host'], $dbCfg['dbname'], $dbCfg['charset'] ?? 'utf8mb4');
             
             $options = [
                 PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
@@ -30,6 +30,11 @@ class Db
         return self::$instance;
     }
 
+    public static function connect(array $config): PDO
+    {
+        return self::init($config);
+    }
+
     public static function getInstance(): PDO
     {
         if (self::$instance === null) {