fix: correct require paths and database connection in album processors

- Fix rootPath calculation in all album processors (was going up too many levels)
- Use global \ from connection.php instead of calling openDatabaseConnection()
- Fix cleanup code in save_album.php to use existing \
- Update all processors to use proper config file includes (env.php, session.php, connection.php, functions.php)
- Ensures validateCSRFToken() and other functions are properly available

src/processors/delete_album.php

@@ -1,14 +1,14 @@
 <?php
-session_start();
+$rootPath = dirname(dirname(__DIR__));
+require_once($rootPath . '/src/config/env.php');
+require_once($rootPath . '/src/config/session.php');
+require_once($rootPath . '/src/config/connection.php');
 
 if (!isset($_SESSION['user_id'])) {
     http_response_code(403);
     exit('Forbidden');
 }
 
-$rootPath = dirname(dirname(dirname(__DIR__)));
-require_once($rootPath . '/connection.php');
-
 $album_id = intval($_GET['id'] ?? 0);
 
 if (!$album_id) {
@@ -16,8 +16,6 @@ if (!$album_id) {
     exit('Album ID is required');
 }
 
-$conn = openDatabaseConnection();
-
 // Verify ownership
 $albumCheck = $conn->prepare("SELECT user_id FROM photo_albums WHERE album_id = ?");
 $albumCheck->bind_param("i", $album_id);