Update -> refactor and optimize UI , code ,...

app/core/security.php

@@ -1,15 +1,32 @@
 <?php
-function encryptText($text, $key) {
-    $iv = random_bytes(16);
+
+function encryptText(string $text, string $key): array
+{
+    $iv     = random_bytes(16);
     $cipher = openssl_encrypt($text, 'AES-256-CBC', $key, 0, $iv);
+    if ($cipher === false) {
+        throw new RuntimeException('Encryption failed.');
+    }
     return [
         'cipher' => $cipher,
-        'iv' => base64_encode($iv)
+        'iv'     => base64_encode($iv),
     ];
 }
-function decryptText($cipher, $iv, $key) {
+
+function decryptText(string $cipher, string $iv, string $key): string|false
+{
     return openssl_decrypt($cipher, 'AES-256-CBC', $key, 0, base64_decode($iv));
 }
-function generateId() {
+
+function generateId(): string
+{
     return bin2hex(random_bytes(16));
 }
+
+function jsonResponse(array $data, int $status = 200): void
+{
+    http_response_code($status);
+    header('Content-Type: application/json');
+    echo json_encode($data);
+    exit;
+}